View MCP98244T-BEMNYAA_8865742.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

? 2012-2013 microchip technology inc. ds22327c-page 1 mcp98244 features meets jedec specification - mcp98244 --> jc42.4-tse2004b1 temperature sensor with 4 kbit serial eeprom for serial presence detect (spd) 1mhz, 2-wire i 2 c? interface specified v dd range: 1.7v to 3.6v operating current: 100 a (typ., eeprom idle) available package: tdfn-8 temperature sensor features temperature-to-digital converter (c) sensor accuracy (grade b): - 0.2c/1c (typ./max.) ? +75c to +95c - 0.5c/2c (typ./max.) ? +40c to +125c - 1c/3c (typ./max.) ? -40c to +125c serial eeprom features operating current: -write ?? 250 a (typical) for 3 ms (typical) - read ?? 100 a (typical) reversible software write protect software write protection for each 1 kbit block organized as two banks of 256 x 8-bit (2 kbit x 2) typical applications dimm modules for servers, pcs, and laptops temperature sensing for solid state drive (ssd) general purpose temperature datalog description microchip technology inc.s mcp98244 digital temperature sensor converts temperature from -40c and +125c to a digital word. this sensor meets jedec specification jc42.4-tse3000b1 memory module thermal sensor component. it provides an accuracy of 0.2c/1c (typical/maximum) from +75c to +95c with an operating voltage of 1.7v to 3.6v. in addition, mcp98244 has an integrated eeprom with two banks of 256 by 8 bit eeprom (4k bit) which can be used to store memory module details and vendor information. the mcp98244 digital temperature sensor comes with user-programmable registers that provide flexibility for dimm temperature-sensing applications. the registers allow user-selectable settings such as shutdown or low-power modes and the specification of temperature event boundaries. when the temperature changes beyond the specified event boundary limits, the mcp98244 outputs an alert signal at the event pin. the user has the option of setting the temperature event output signal polarity as either an active-low or active-high comparator output for thermostat operation, or as a temperature event interrupt output for microprocessor-based systems. the mcp98244 eeprom is designed specifically for dram dimms (dual in-line memory modules) serial presence detect (spd). it has four 128 byte pages, which can be software write protected individually. this allows dram vendor and product information to be stored and write-protected. this sensor has an industry standard i 2 c fast mode plus compatible 1 mhz serial interface. package types dimm module mcp98244 8-pin 2x3 tdfn* * includes exposed thermal pad (ep); see ta b l e 3 -1 . scl event sda a1a2 1 2 3 4 8 7 6 5 gnd a0 v dd ep 9 ddr4 dimm temperature se nsor with eeprom for spd downloaded from: http:///
mcp98244 ds22327c-page 2 ? 2012-2013 microchip technology inc. notes: downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 3 mcp98244 1.0 electrical characteristics absolute maximum ratings ? v dd .................................................................................. 4.0v voltage at all input/output pins ............... gnd C 0.3v to 4.0v pin a0 .......................................................gnd C 0.3v to 11v storage temperature .....................................-65c to +150c ambient temp. with power applied ................-40c to +125c junction temperature (t j ) .......................................... +150c esd protection on all pins (hbm:mm) ................. (4 kv:200v) latch-up current at each pin (25c) ....................... 200 ma ?notice: stresses above those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this s pecification is not implied. exposure to maximum rating conditions for extended periods may affect device reliability. temperature sensor dc characteristics electrical specifications: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground, and t a = -40c to +125c. parameters sym min typ max unit conditions temperature sensor accuracy +75c < t a ? +95c t acy -1.0 0.2 +1.0 c jc42.4 - tse2004b1 grade b accuracy specification v dd = 1.7v to 3.6v +40c < t a ? +125c -2.0 0.5 +2.0 c -40c < t a ? +125c -3.0 1 +3.0 c temperature conversion time 0.5c/bit t conv 3 0 m s 0.25c/bit 65 125 ms 15 s/sec (typical) (see section 5.2.4 ) 0.125c/bit 130 ms 0.0625c/bit 260 ms power supply specified voltage range v dd 1.7 3.6 v operating current i dd_ts 100 500 a eeprom inactive shutdown current i shdn 0.2 1 a eeprom inactive, i 2 c bus inactive, t a = 85c power on reset (por) v por 1.4 1.6 v threshold for rising and falling v dd settling time after por t por 1 ms for warm and cold power cycles line regulation ? c 0.2 c v dd = 1.7v to 3.6v event output (open-drain output, external pull-up resistor required), see section 5.2.3 high-level current (leakage) i oh 1 av oh = v dd low-level voltage v ol 0 . 4 vi ol = 3 ma (active-low, pull-up resistor) thermal response, from +25c (air) to +125c (oil bath) tdfn-8 t res 0.7 s time to 63% (89c) downloaded from: http:///
mcp98244 ds22327c-page 4 ? 2012-2013 microchip technology inc. temperature characteristics mcp98244 eeprom dc characteristics electrical specifications: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground, and t a = -40c to +125c. parameters sym min typ max unit conditions current, eeprom write (for t wc )i dd_ee 250 2000 a sensor in shutdown mode current, eeprom read i dd_ee 100 500 a write cycle time (byte/page) t wc 3 5 m s endurance t a = +25c 10k cycles write cycles, v dd = 3.3v ( note 1 , note 2 ) eeprom write temperature ee write 0 8 5 c eeprom read temperature ee read -40 125 c for minimum read temperature, see note 1 write protect voltage swp and cwp voltage v hv 7 10 v applied at a0 pin note 1: characterized but not production tested. 2: for endurance estimates in a specific application, please consult the total endurance? model, which can be obtained from microchips web site at www.microchip.com/totalendurance . input/output pin dc characteristics electrical specifications: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground and t a = -40c to +125c. parameters sym min typ max units conditions serial input/output (scl, sda, a0, a1, a2) input high-level voltage v ih 0.7v dd v low-level voltage v il 0.3v dd v input current i in 5 a sda and scl only input impedance (a0, a1, a2) z in 1m ? v in > v ih input impedance (a0, a1, a2) z in 200 k ? v in < v il output (sda only) low-level voltage v ol 0 . 4vi ol = 3 ma high-level current (leakage) i oh 1 a v oh = v dd low-level current i ol 20 ma v ol = 0.4v; v dd 2.2v 6m a v ol = 0.6v capacitance c in 5p f sda and scl inputs hysteresis v hyst 0.05v dd v spike suppression t sp 50 ns electrical specifications: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground, and t a = -40c to +125c. parameters sym min typ max units conditions temperature ranges specified temperature range t a -40 +125 c note 1 operating temperature range t a -40 +125 c storage temperature range t a -65 +150 c thermal package resistances thermal resistance, 8l-tdfn ? ja 5 2 . 5 c / w note 1: operation in this range must not cause t j to exceed maximum junction temperature (+150c). downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 5 mcp98244 timing diagram serial interface timing specifications electrical specifications: unless otherwise indicated, gnd = ground, t a = -40c to +125c, and c l = 80 pf ( note 1 ) . v dd = 1.7v to 3.6v v dd = 2.2v to 3.6v 100 khz 400 khz 1000 khz parameters sym min max min max min max units 2-wire i 2 c interface serial port frequency ( note 2 , 4 )f scl 10 100 10 400 10 1000 khz low clock ( note 2 )t low 4700 1300 500 ns high clock t high 4000 600 260 ns rise time ( note 5 )t r 1000 20 300 120 ns fall time ( note 5 )t f 20 300 20 300 120 ns data in setup time ( note 3 ) t su:dat 250 100 5 0n s data in hold time ( note 6 )t hd:di 0 0 0n s data out hold time ( note 4 )t hd:do 200 900 200 900 0 350 ns start condition setup time t su:sta 4700 600 260 ns start condition hold time t hd:sta 4000 600 260 ns stop condition setup time t su:sto 4000 600 260 ns bus idle/free t b-free 4700 1300 500 ns time out t out 25 35 25 35 25 35 ms bus capacitive load c b 400 100 pf note 1: all values referred to v il max and v ih min levels. 2: if t low > t out , the temperature sensor i 2 c interface will time out. a repeat start command is required for communication. 3: this device can be used in a standard-mode i 2 c-bus system, but the requirement t su:dat ? 250 ns must be met. this device does not stretch scl low period. it outputs the next data bit to the sda line within t rmax + t su:dat min = 1000 ns + 250 ns = 1250 ns (according to the standard-mode i 2 c-bus specification) before the scl line is released. 4: as a transmitter, the device provides internal minimum delay time t hd:dat min to bridge the undefined region (min. 200 ns) of the falling edge of scl t f max to avoid unintended generation of start or stop conditions. 5: characterized but not production tested. 6: as a receiver, sda should not be sampled at the falling edge of scl. sda can transition t hd:di 0 ns after scl toggles low. t su:s to t su:di t su:di t su:sto t b:fr ee s c l sd a t h d :d i / t h d: d o t high t l ow t o u t t r , t f start condition data transmission stop condition downloaded from: http:///
mcp98244 ds22327c-page 6 ? 2012-2013 microchip technology inc. 2.0 typical performance curves note: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground, sda/scl pulled-up to v dd , and t a = -40c to +125c. figure 2-1: temperature accuracy. figure 2-2: temperature accuracy histogram, t a = + 85 c. figure 2-3: temperature accuracy histogram, t a = + 105 c. figure 2-4: supply current vs. temperature. figure 2-5: shutdown current vs. temperature. figure 2-6: power on reset threshold voltage vs. temperature. note: the graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. the performance characteristics listed herein are not tested or guaranteed. in some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. -1.0 0.0 1.0 2.0 3.0 e rature accuracy (c) v dd = 1.7 v to 3.6 v 16 units spec. limits +std. dev. a vera g e -3.0 -2.0 -40 -20 0 20 40 60 80 100 120 temp e t a (c) g -std. dev. 25% 50% 75% 100% occurrences t a = +85 c v dd = 1.7 v - 3.6 v 16 units 0% -1.00-0.75 -0.50 -0.25 0.000.25 0.50 0.75 1.00 temperature accuracy (c) 25% 50% 75% 100% occurrences t a = +25 c v dd = 1.7 v - 3.6 v 16 units 0% -1.00-0.75 -0.50 -0.25 0.000.25 0.50 0.75 1.00 temperature accuracy (c) 150 200 250 300 i dd (a) eeprom write (sensor in shutdown mode) eeprom read (sensor in shutdown mode) 50 100 -40 -20 0 20 40 60 80 100 120 t a (c) sensor (eeprom inactive) 025 0.50 0.75 1.00 i shdn (a) 0.00 0 . 25 -40 -20 0 20 40 60 80 100 120 t a (c ) 1 1.2 1.4 1.6 1.8 v por (v) falling v dd rising v dd 0.6 0.8 -40 -20 0 20 40 60 80 100 120 t a (c) downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 7 mcp98244 note: unless otherwise indicated, v dd = 1.7v to 3.6v, gnd = ground, sda/scl pulled-up to v dd , and t a = -40c to +125c. figure 2-7: event output and sda v ol vs. temperature. figure 2-8: temperature conversion rate vs. temperature. figure 2-9: sda i ol vs. temperature. figure 2-10: line regulation: change in temperature accuracy vs. change in v dd . figure 2-11: i 2 c protocol time-out vs. temperature. 01 0.2 0.3 0.4 e nt & sda v ol (v) sda, i ol = 20 ma v dd = 2.2 v to 3.6 v 0 0 . 1 -40 -20 0 20 40 60 80 100 120 ev e t a (c) event, i ol = 3 ma 50 75 100 125 150 175 200 t conv (ms) 0.0625 c/lsb 0.125 c/lsb 0 25 50 -40 -20 0 20 40 60 80 100 120 t a (c) 0.25 c/lsb 0.5 c/lsb 20 30 40 50 sda i ol (ma) v ol = 0.6v 10 20 -40 -20 0 20 40 60 80 100 120 t a (c) -1.0 0.0 1.0 2.0 3.0 l ized temp. error (c) v dd = 1.7 v v dd = 3.6 v -3.0 -2.0 -40 -20 0 20 40 60 80 100 120 norma l t a (c) 30 35 c bus t out (ms) 25 -40 -20 0 20 40 60 80 100 120 i 2 c t a (c) downloaded from: http:///
mcp98244 ds22327c-page 8 ? 2012-2013 microchip technology inc. 3.0 pin description the descriptions of the pins are listed in tab l e 3 - 1 . table 3-1: pin function tables 3.1 address pins (a0, a1, a2) these pins are device address input pins. the address pins correspond to the least significant bits (lsb) of address bits. the most significant bits (msb) are (a6, a5, a4, a3). this is shown in table 3-2 . the a0 address pin is a multi-function pin. this input pin is also used for high voltage input v hv to enable the eeprom software write protect feature, for more information see section 5.3.3 ?bank or page selec- tion for eeprom read/write operation? . all address pin have an internal pull-down resistors. 3.2 ground pin (gnd) the gnd pin is the system ground pin. 3.3 serial data line (sda) sda is a bidirectional input/output pin, used to serially transmit data to/from the host controller. this pin requires a pull-up resistor. (see section 4.0 ?serial communication? ). 3.4 serial clock line (scl) the scl is a clock input pin. all communication timing is relative to the signal on this pin. the clock is gener- ated by the host or master controller on the bus. (see section 4.0 ?serial communication? ). 3.5 temperature alert, open-drain output (event) the mcp98244 temperature event output pin is an open-drain output. the device outputs a signal when the ambient temperature goes beyond the user-pro- grammed temperature limit. (see section 5.2.3 ?event output configuration? ). 3.6 power pin (v dd ) v dd is the power pin. the operating voltage range, as specified in the dc electrical specification table, is applied on this pin. 3.7 exposed thermal pad (ep) there is an internal electrical connection between the exposed thermal pad (ep) and the gnd pin; they can be connected to the same potential on the printed circuit board (pcb). this provides better thermal conduction from the pcb to the die. mcp98244 symbol description tdfn 1 a0 slave address and eeprom software write protect high voltage input (v hv ) 2 a1 slave address 3 a2 slave address 4 gnd ground 5 sda serial data line 6 scl serial clock line 7 event temperature alert output 8v dd power pin 9 ep exposed thermal pad (ep); can be connected to gnd. table 3-2: mcp98244 address byte device address code slave address a6 a5 a4 a3 a2 a1 a0 sensor 0011 x 1 x 1 x 1 eeprom 1010 eeprom write protect 0110 2 2 2 note 1: user-selectable address is shown by x, where x is 1 or 0 for v dd and gnd, respectively. 2: the address pins are ignored for all write protect commands. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 9 mcp98244 4.0 serial communication 4.1 2-wire standard mode i 2 c? protocol-compatible interface the mcp98244 serial clock input (scl) and the bidirectional serial data line (sda) form a 2-wire bidirectional standard mode i 2 c-compatible communication port (refer to the input/output pin dc characteristics table and serial interface timing specifications table). the following bus protocol has been defined: table 4-1: mcp98244 serial bus protocol descriptions 4.1.1 data transfer data transfers are initiated by a start condition (start), followed by a 7-bit device address and a read/write bit. an acknowledge (ack) from the slave confirms the reception of each byte. each access must be terminated by a stop condition (stop). repeated communication is initiated after t b-free . this device does not support sequential register read/ write. each register needs to be addressed using the register pointer. this device supports the receive protocol. the register can be specified using the pointer for the initial read. each repeated read or receive begins with a start condition and address byte. the mcp98244 retains the previously selected register. therefore, they output data from the previously-specified register (repeated pointer specification is not necessary). 4.1.2 master/slave the bus is controlled by a master device (typically a microcontroller) that controls the bus access and generates the start and stop conditions. the mcp98244 is a slave device and does not control other devices in the bus. both master and slave devices can operate as either transmitter or receiver. however, the master device determines which mode is activated. 4.1.3 start/stop condition a high-to-low transition of the sda line (while scl is high) is the start condition. all data transfers must be preceded by a start condition from the master. a low- to-high transition of the sda line (while scl is high) signifies a stop condition. if a start or stop condition is introduced during data transmission, the mcp98244 releases the bus. all data transfers are ended by a stop condition from the master. 4.1.4 address byte following the start condition, the host must transmit an 8-bit address byte to the mcp98244. the address for the mcp98244 temperature sensor is 0011,a2,a1,a0 in binary, where the a2, a1 and a0 bits are set externally by connecting the corresponding pins to v dd 1 or gnd 0 . the 7-bit address transmitted in the serial bit stream must match the selected address for the mcp98244 to respond with an ack. bit 8 in the address byte is a read/write bit. setting this bit to 1 commands a read operation, while 0 commands a write operation (see figure 4-1 ). figure 4-1: device addressing. 4.1.5 data valid after the start condition, each bit of data in transmission needs to be settled for a time specified by t su-data before scl toggles from low-to-high (see serial interface timing specifications table). term description master the device that controls the serial bus, typically a microcontroller. slave the device addressed by the master, such as the mcp98244 . transmitter device sending data to the bus. receiver device receiving data from the bus. start a unique signal from master to initiate serial interface with a slave. stop a unique signal from the master to terminate serial interface from a slave. read/write a read or write to the mcp98244 registers. ack a receiver acknowledges (ack) the reception of each byte by polling the bus. nak a receiver not-acknowledges (nak) or releases the bus to show end-of-data (eod). busy communication is not possible because the bus is in use. not busy the bus is in the idle state, both sda and scl remain high. data valid sda must remain stable before scl becomes high in order for a data bit to be considered valid. during normal data transfers, sda only changes state while scl is low. 123456789 scl sda 0 0 1 1 a2 a1 a0 start address byte slave address r/w mcp98244 response code address ac k downloaded from: http:///
mcp98244 ds22327c-page 10 ? 2012-2013 microchip technology inc. 4.1.6 acknowledge (ack/nak) each receiving device, when addressed, is obliged to generate an ack bit after the reception of each byte. the master device must generate an extra clock pulse for ack to be recognized. the acknowledging device pulls down the sda line for t su-data before the low-to-high transition of scl from the master. sda also needs to remain pulled down for t h-data after a high-to-low transition of scl. during read, the master must signal an end-of-data (eod) to the slave by not generating an ack bit (nak) once the last bit has been clocked out of the slave. in this case, the slave will leave the data line released to enable the master to generate the stop condition. 4.1.7 time out (t out ) if the scl stays low or high for time specified by t out , the mcp98244 resets the serial interface. this dictates the minimum clock speed as indicated in the specification. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 11 mcp98244 5.0 functional description the mcp98244 temperature sensors consists of a band-gap type temperature sensor, a delta-sigma analog-to-digital converter ( ??? adc), user-program- mable registers and a 2-wire i 2 c protocol compatible serial interface. figure 5-1 shows a block diagram of the register structure. figure 5-1: functional block diagram. clear event 0.5c/bit 0.25c/bit 0.125c/bit 0.0625c/bit temperature t upper t lower configuration ?? adc band-gap temperature sensor event status output control critical event only event polarity event comp/int t crit capability temp. range accuracy output feature register pointer critical trip lock alarm win. lock bit shutdown hysteresis manufacturer id resolution device id/rev selected resolution standard i 2 c interface a0 a1 a2 event sda scl v dd gnd i 2 c bus time-out accepts v hv shutdown status mcp98244 temperature sensor mcp98244 eeprom memory control logic xdec hv generator software write write protect circuitry ydec sense amp r/w control protected area (00h-7fh) (7fh-ffh) software write protected area (00h-7fh) (7fh-ffh) software write protected area software write protected area downloaded from: http:///
mcp98244 ds22327c-page 12 ? 2012-2013 microchip technology inc. 5.1 registers the mcp98244 device has several registers that are user-accessible. these registers include the capability register, configuration register, event temperature upper-boundary and lower-boundary trip registers, critical temperature trip register, temperature register, manufacturer identification register and device identification register. the temperature register is read-only, used to access the ambient temperature data. the data is loaded in parallel to this register after t conv . the event temperature upper-boundary and lower-boundary trip registers are read/writes. if the ambient temperature drifts beyond the user-specified limits, the mcp98244 device outputs a signal using the event pin (refer to section 5.2.3 ?event output configuration? ). in addition, the critical temperature trip register is used to provide an additional critical temperature limit. the capability register is used to provide bits describing the mcp98244s capability in measurement resolution, measurement range and device accuracy. the device configuration register provides access to configure the mcp98244s various features. these registers are described in further detail in the following sections. the registers are accessed by sending a register pointer to the mcp98244 using the serial interface. this is an 8-bit write-only pointer, and register 5-1 describes the pointer assignment. register 5-1: register pointer (write only) w-0 w-0 w-0 w-0 w-0 w-0 w-0 w-0 pointer bits bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 7-4 writable bits: write 0 bit 3-0 pointer bits: 0000 = capability register 0001 = configuration register (config) 0010 = event temperature upper-boundary trip register (t upper ) 0011 = event temperature lower-boundary trip register (t lower ) 0100 = critical temperature trip register (t crit ) 0101 = temperature register (t a ) 0110 = manufacturer id register 0111 = device id/revision register 1000 = tse2004av device id and vendor silicon revision register 1001 = resolution register 1xxx = unused (the device will not acknowledge commands to other pointer locations.). downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 13 mcp98244 table 5-1: bit assignment summary for all temperature sensor registers (see section 5.4 ) register pointer (hex) msb/ lsb bit assignment 76543210 0x00 msb 00000000 lsb shdn status t out range v hv resolution range accuracy event 0x01 msb 00000 hysteresis shdn lsb crt loc win loc int clr evt stat evt cnt evt sel evt pol evt mod 0x02 msb 000 sign 2 7 c 2 6 c 2 5 c 2 4 c lsb 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c 0 0 0x03 msb 000 sign 2 7 c 2 6 c 2 5 c 2 4 c lsb 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c 0 0 0x04 msb 000 sign 2 7 c 2 6 c 2 5 c 2 4 c lsb 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c 0 0 0x05 msb t a ?? t crit t a ?? t upper t a ?? t lower sign 2 7 c 2 6 c 2 5 c 2 4 c lsb 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c 2 -3 c 2 -4 c 0x06 msb 00000000 lsb 01010100 0x07 msb 00100010 lsb 00000001 0x08 msb 00100010 lsb 00000001 0x09 msb 00000000 lsb 000000 resolution downloaded from: http:///
mcp98244 ds22327c-page 14 ? 2012-2013 microchip technology inc. 5.1.1 capability register this is a read-only register used to identify the temperature sensor capability. the device capability bit assignments are specified by tse2004av, and this device is factory configured to meet the default conditions as described in register 5-2 (these values can not be changed). for example, the mcp98244 device is capable of providing temperature at 0.25c resolution, measuring temperature below and above 0c, providing 1c and 2c accuracy over the active and monitor temperature ranges (respectively) and providing user- programmable temperature event boundary trip limits. these functions are described in further detail in the following sections. register 5-2: capability register (read-only) ? address ?0000 0000?b u-0 u-0 u-0 u-0 u-0 u-0 u-0 u-0 bit 15 bit 8 r-1 r-1 r-1 r-0 r-1 r-1 r-1 r-1 shdn status t out range v hv resolution meas. range accuracy temp alarm bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15-8 unimplemented: read as 0 bit 7 event output status during shutdown (shdn status): 0 = event output remains in previous state. if the output asserts before shutdown command, it remains asserted during shutdown. 1 = event output deasserts during shutdown. after shutdown, it takes t conv to re-assert the event output (power-up default) bit 6 i 2 c bus time-out (t out range): 0 = bus time-out range is 10 ms to 60 ms 1 = bus time-out range is 25 ms to 35 ms (power-up default) bit 5 high voltage input 0 = pin a0 does not accept high voltage 1 = pin a0 accepts high voltage for the eeprom write protect feature (power-up default) bit 4-3 resolution: 00 = 0.5c 01 = 0.25c (power up default) 10 = 0.125c 11 = 0.0625c these bits reflect the selected resolution (see section 5.2.4 ?temperature resolution? ) bit 2 temperature measurement range (meas. range): 0 =t a ?? 0 (decimal) for temperature below 0c ? 1 = the part can measure temperature below 0c (power-up default) downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 15 mcp98244 figure 5-2: timing diagram for reading the capability register (see section 4.0 ?serial communication? ). bit 1 accuracy: 0 =accuracy ?? 2c from +75c to +95c (active range) and 3c from +40c to +125c (monitor range) 1 =accuracy ?? 1c from +75c to +95c (active range) and 2c from +40c to +125c (monitor range) bit 0 temperature alarm: 0 = no defined function (this bit will never be cleared or set to 0.) 1 = the part has temperature boundary trip limits (t upper /t lower /t crit registers) and a temperature event output (jc 42.4 required feature) register 5-2: capability register (read-only) ? address ?0000 0000?b (continued) sda ac k 0011 a capability pointer 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte ac k 0011 a msb data ac k na k s p 2 a 1 a 0 12345678 12345678 12345678 address byte lsb data r mcp98244 mcp98244 mcp98244 master master w sda scl 000 00000 000 00001 111 downloaded from: http:///
mcp98244 ds22327c-page 16 ? 2012-2013 microchip technology inc. 5.1.2 sensor configuration register (config) the mcp98244 device has a 16-bit configuration reg- ister (config) that allows the user to set various func- tions for a robust temperature monitoring system. bits 10 thru 0 are used to select event output boundary hysteresis, device shutdown or low-power mode, temperature boundary and critical temperature lock, or temperature event output enable/disable. in addition, the user can select the event output condition (output set for t upper and t lower temperature boundary or t crit only), read event output status and set event output polarity and mode (comparator output or interrupt output mode). the temperature hysteresis bits 10 and 9 can be used to prevent output chatter when the ambient temperature gradually changes beyond the user- specified temperature boundary (see section 5.2.2 ?temperature hysteresis (t hyst )? . the continuous conversion or shutdown mode is selected using bit 8. in shutdown mode, the band gap temperature sensor circuit stops converting temperature and the ambient temperature register (t a ) holds the previous successfully converted temperature data (see section 5.2.1 ?shutdown mode? ). bits 7 and 6 are used to lock the user-specified boundaries t upper , t lower and t crit to prevent an accidental rewrite. bits 5 thru 0 are used to configure the temperature event output pin. all functions are described in register 5-3 (see section 5.2.3 ?event output configuration? ). register 5-3: co nfiguration register (config) ? address 0000 0001b u-0 u-0 u-0 u-0 u-0 r/w-0 r/w-0 r/w-0 t hyst shdn bit 15 bit 8 r/w-0 r/w-0 r/w-0 r-0 r/w-0 r/w-0 r/w-0 r/w-0 crit. lock win. lock int. clear event stat. event cnt. event sel. event pol. event mod. bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15-11 unimplemented: read as 0 bit 10-9 t upper and t lower limit hysteresis (t hyst ): 00 = 0c (power-up default) 01 = 1.5c 10 = 3.0c 11 = 6.0c (refer to section 5.2.3 ?event output configuration? ) this bit can not be altered when either of the lock bits are set (bit 6 and bit 7). this bit can be programmed in shutdown mode. bit 8 shutdown mode (shdn): 0 = continuous conversion (power-up default) 1 = shutdown (low-power mode) in shutdown, all power-consuming activities are disabled, though all registers can be written to or read. event output will deassert. this bit cannot be set 1 when either of the lock bits is set (bit 6 and bit 7). however, it can be cleared 0 for continuous conversion while locked (refer to section 5.2.1 ?shutdown mode? ). downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 17 mcp98244 bit 7 t crit lock bit (crit. lock): 0 = unlocked. t crit register can be written (power-up default) 1 =locked. t crit register can not be written when enabled, this bit remains set 1 or locked until cleared by internal reset ( section 5.4 ?summary of power-on default? ). this bit does not require a double-write. this bit can be programmed in shutdown mode. bit 6 t upper and t lower window lock bit (win. lock): 0 = unlocked. t upper and t lower registers can be written (power-up default) 1 =locked. t upper and t lower registers can not be written when enabled, this bit remains set 1 or locked until cleared by power-on respell ( section 5.4 ?sum- mary of power-on default? ). this bit does not require a double-write. this bit can be programmed in shutdown mode. bit 5 interrupt clear (int. clear) bit: 0 = no effect (power-up default) 1 = clear interrupt output. when read this bit returns 0 this bit clears the interrupt flag which deasserts event output. in shutdown mode, the event output is always deasserted. therefore, setting this bit in shutdown mode clears the interrupt after the device returns to normal operation. bit 4 event output status (event stat.) bit: 0 = event output is not asserted by the device (power-up default) 1 = event output is asserted as a comparator/interrupt or critical temperature output in shutdown mode this bit will clear because event output is always deasser ted in shutdown mode. bit 3 event output control (event cnt.) bit: 0 = event output disabled (power-up default) 1 = event output enabled this bit can not be altered when either of the lock bits is set (bit 6 and bit 7). this bit can be programmed in shutdown mode, but event output will remain deasserted. bit 2 event output select (event sel.) bit: 0 = event output for t upper , t lower and t crit (power-up default) 1 = t a t crit only. (t upper and t lower temperature boundaries are disabled.) when the alarm window lock bit is set, this bit cannot be altered until unlocked (bit 6). this bit can be programmed in shutdown mode, but event output will remain deasserted. bit 1 event output polarity (event pol.) bit: 0 = active low (power-up default. pull-up resistor required) 1 = active-high this bit cannot be altered when either of the lock bits is set (bit 6 and bit 7). this bit can be programmed in shutdown mode, but event output will remain deasserted, see section 5.2.3 ?event output configuration? bit 0 event output mode (event mod.) bit: 0 = comparator output (power-up default) 1 = interrupt output this bit cannot be altered when either of the lock bits is set (bit 6 and bit 7). this bit can be programmed in shutdown mode, but event output will remain deasserted. register 5-3: co nfiguration register (config) ? address 0000 0001b (continued) downloaded from: http:///
mcp98244 ds22327c-page 18 ? 2012-2013 microchip technology inc. figure 5-3: timing diagram for writing to the configuration register (see section 4.0 ?serial communication? . writing to the config register to enable the event output pin <0000 0000 0000 1000>b. sda ac k 0011 a 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte w mcp98244 mcp98244 msb data ac k ac k p 12345678 12345678 lsb data configuration pointer mcp98244 mcp98244 001 00000 000 00001 000 note: this is an example routine: i2c_start(); // send start command i2c_write(addressbyte & 0xfe); //write command //also, make sure bit 0 is cleared 0 i2c_write(0x01); // write config register i2c_write(0x00); // write data i2c_write(0x08); // write data i2c_stop(); // send stop command downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 19 mcp98244 figure 5-4: timing diagram for reading from the configuration register (see section 4.0 ?serial communication? ). sda ac k 0011 a configuration pointer 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte ac k 0011 a msb data ac k na k s p 2 a 1 a 0 12345678 12345678 12345678 address byte lsb data r mcp98244 mcp98244 mcp98244 master master w sda scl 001 00000 000 00001 000 reading the config register. note: it is not necessary to select the register pointer if it was set from the previous read/write. note: this is an example routine: i2c_start(); // send start command i2c_write(addressbyte & 0xfe); //write command //also, make sure bit 0 is cleared 0 i2c_write(0x01); // write config register i2c_start(); // send repeat start command i2c_write(addressbyte | 0x01); //read command //also, make sure bit 0 is set 1 upperbyte = i2c_read(ack); // read 8 bits //and send ack bit lowerbyte = i2c_read(nak); // read 8 bits //and send nak bit i2c_stop(); // send stop command downloaded from: http:///
mcp98244 ds22327c-page 20 ? 2012-2013 microchip technology inc. 5.1.3 upper/lower/critical temperature limit registers (t upper /t lower /t crit ) the mcp98244 device has a 16-bit read/write event output temperature upper-boundary trip register (t upper ), a 16-bit lower-boundary trip register (t lower ) and a 16-bit critical boundary trip register (t crit ) that contains 11-bit data in twos complement format (0.25c). this data represents the maximum and minimum temperature boundary or temperature window that can be used to monitor ambient temperature. if this feature is enabled ( section 5.1.2 ?sensor configuration register (config)? ) and the ambient temperature exceeds the specified boundary or window, the mcp98244 asserts an event output. (refer to section 5.2.3 ?event output configuration? ). register 5-4: upper/lower/critical temperature limit register (t upper /t lower / t crit ) ? address 0000 0010b/0000 0011b / 0000 0100b ( note 1 ) u-0 u-0 u-0 r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 s i g n2 7 c 2 6 c 2 5 c 2 4 c bit 15 bit 8 r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 r/w-0 u-0 u-0 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15-13 unimplemented: read as 0 bit 12 sign: 0 =t a ?? 0c ? 1 =t a ? 0c bit 11-2 t upper /t lower /t crit : temperature boundary trip data in twos complement format. bit 1-0 unimplemented: read as 0 note 1: this table shows two 16-bit registers for t upper , t lower and t crit located at 0000 0010b , 0000 0011b and 0000 0100b , respectively. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 21 mcp98244 figure 5-5: timing diagram for writing and reading from the t upper register (see section 4.0 ?serial communication? ). sda ac k 0011 a t upper pointer 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte ac k 0011 a msb data ac k na k s p 2 a 1 a 0 12345678 12345678 12345678 address byte lsb data r mcp98244 mcp98244 mcp98244 master master w sda scl 010 00000 101 10100 000 reading from the t upper register. writing 90c to the t upper register <0000 0101 1010 0000>b. sda ac k 0011 a 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte w mcp98244 mcp98244 msb data ac k ac k p 12345678 12345678 lsb data t upper pointer mcp98244 mcp98244 010 00000 101 10100 000 note: it is not necessary to select the register pointer if it was set from the previous read/write. downloaded from: http:///
mcp98244 ds22327c-page 22 ? 2012-2013 microchip technology inc. 5.1.4 ambient temperature register (t a ) the mcp98244 device uses a band gap temperature sensor circuit to output analog voltage proportional to absolute temperature. an internal ?? adc is used to convert the analog voltage to a digital word. the converter resolution is set to 0.25c + sign (11-bit data). the digital word is loaded to a 16-bit read-only ambient temperature register (t a ) that contains 11-bit temperature data in twos complement format. the t a register bits (bits 12 through 0) are double-buff- ered. therefore, the user can access the register while, in the background, the mcp98244 performs an analog- to-digital conversion. the temperature data from the ?? adc is loaded in parallel to the t a register at t conv refresh rate. in addition, the t a register uses three bits (bits 15, 14 and 13) to reflect the event pin state. this allows the user to identify the cause of the event output trigger (see section 5.2.3 ?event output configuration? ); bit 15 is set to 1 if t a is greater than or equal to t crit , bit 14 is set to 1 if t a is greater than t upper and bit 13 is set to 1 if t a is less than t lower . the t a register bit assignment and boundary conditions are described in register 5-5 . register 5-5: ambient temperature register (t a ) ? address 0000 0101b ( note 1 ) r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 t a vs. t crit t a vs. t upper t a vs. t lower sign 2 7 c 2 6 c 2 5 c 2 4 c bit 15 bit 8 r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 2 3 c 2 2 c 2 1 c 2 0 c 2 -1 c 2 -2 c 2 -3 c 2 -4 c bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15 t a vs. t crit bit: ( note 1 ) 0 =t a ?? t crit 1 =t a ?? t crit bit 14 t a vs. t upper bit ( note 1 ): 0 =t a ?? t upper 1 =t a ?? t upper bit 13 t a vs. t lower bit ( note 1 ): 0 =t a ?? t lower 1 =t a ?? t lower bit 12 sign bit:0 =t a ?? 0c ? 1 =t a ? 0c bit 11-0 ambient temperature (t a ) bits: ( note 2 ) 12-bit ambient temperature data in twos complement format. note 1: bits 15, 14 and 13 are not affected by the status of the event output configuration (bits 5 to 0 of config) ( register 5-3 ). 2: bits 2, 1, and 0 may remain clear '0' depending on the status of the resolution register. the power-up default is 0.25c/bit, bits 1 and 0 remain clear '0' . downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 23 mcp98244 5.1.4.1 t a bits to temperature conversion to convert the t a bits to decimal temperature, the upper three boundary bits (15, 14 and 13) must be masked out. then determine the sign bit (bit 12) to check positive or negative temperature, shift the bits accordingly and combine the upper and lower bytes of the 16-bit register. the upper byte contains data for temperatures greater than 32c, while the lower byte contains data for temperature less than 32c, including fractional data. when combining the upper and lower bytes, the upper byte must be right-shifted by 4 bits (or multiply by 2 4 ) and the lower byte must be left-shifted by 4 bits (or multiply by 2 -4 ). adding the results of the shifted values provides the temperature data in decimal format; see equation 5-1 . the temperature bits are in twos complement format, therefore, positive temperature data and negative tem- perature data are computed differently. equation 5-1 shows the temperature computation. the example instruction code outlined in figure 5-6 shows the communication flow, also see figure 5-7 for timing diagram. equation 5-1: bytes to temperature conversion figure 5-6: example instruction code. where: t a = ambient temperature (c) upperbyte = t a bit 11 to bit 8 lowerbyte = t a bit 7 to bit 0 temperature ? 0c (bit 12 or sign bit = 0) temperature ? 0c (bit 12 or sign bit = 1) t a upperbyte 2 4 lowerbyte 2 4 ? ? + ? ?? = t a upperbyte 2 4 lowerbyte 2 4 ? ? + ? ?? 256 ? = i2c_start(); // send start command i2c_write(addressbyte & 0xfe); //write command //also, make sure bit 0 is cleared 0 i2c_write(0x05); // write t a register address i2c_start(); //repeat start i2c_write(addressbyte | 0x01); // read command //also, make sure bit 0 is set 1 upperbyte = i2c_read(ack); // read 8 bits //and send ack bit lowerbyte = i2c_read(nak); // read 8 bits //and send nak bit i2c_stop(); // send stop command //convert the temperature data //first check flag bits if ((upperbyte & 0x80) == 0x80){ //t a ?? t crit } if ((upperbyte & 0x40) == 0x40){ //t a ?? t upper } if ((upperbyte & 0x20) == 0x20){ //t a ?? t lower } upperbyte = upperbyte & 0x1f; //clear flag bits if ((upperbyte & 0x10) == 0x10){ //t a ? 0c upperbyte = upperbyte & 0x0f; //clear sign temperature = 256 - (upperbyte x 16 + lowerbyte / 16); }else //t a ? 0c temperature = (upperbyte x 16 + lowerbyte / 16); // temperature = ambient temperature (c) this example routine assumes the variables and i 2 c communication subroutines are predefined: downloaded from: http:///
mcp98244 ds22327c-page 24 ? 2012-2013 microchip technology inc. figure 5-7: timing diagram for reading +25.25c temperature from the t a register (see section 4.0 ?serial communication? ). sda ac k 0011 a t a pointer 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte ac k 0011 a msb data ac k na k s p 2 a 1 a 0 12345678 12345678 12345678 address byte lsb data r mcp98244 mcp98244 mcp98244 master master w sda scl 101 00000 001 10010 100 note: it is not necessary to select the register pointer if it was set from the previous read/write. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 25 mcp98244 5.1.5 manufacturer id register this register is used to identify the manufacturer of the device in order to perform manufacturer specific operation. the manufacturer id for the mcp98244 is 0x0054 (hexadecimal). figure 5-8: timing diagram for reading the manufacturer id register (see section 4.0 ?serial communication? ). register 5-6: manufacturer id register (read-only) ? address 0000 0110b r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-0 manufacturer id bit 15 bit 8 r-0 r-1 r-0 r-1 r-0 r-1 r-0 r-0 manufacturer id bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15-0 device manufacturer identification number . sda ac k 0011 a manuf. id pointer 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte ac k 0011 a msb data ac k na k s p 2 a 1 a 0 12345678 12345678 12345678 address byte lsb data r mcp98244 mcp98244 mcp98244 master master w sda scl 110 00000 000 01010 100 note: it is not necessary to select the register pointer if it was set from the previous read/write. downloaded from: http:///
mcp98244 ds22327c-page 26 ? 2012-2013 microchip technology inc. 5.1.6 device id and revision register there are two device id and revision id registers. address pointer 0x07 is specific to tse2004av devices and it is used to identify compliant devices. address pointer 0x08 is a microchip-specific register and it is used to identify microchip devices. the upper byte of these registers is used to specify the device identifica- tion and the lower byte is used to specify device silicon revision. the device id for the mcp98244 is 0x22 (hex) (same as tse2004av). the revision (lower byte) begins with 0x00 (hex) for the first release, with the number being incremented as revised versions are released. register 5-7: tse2004av device id and device revision (read-only) ? address 0000 0111b and 0000 1000b r-0 r-0 r-1 r-0 r-0 r-0 r-1 r-0 device id bit 15 bit 8 r-0 r-0 r-0 r-0 r-0 r-0 r-0 r-1 device revision bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15-8 device id: bit 15 to bit 8 are used for device id bit 7-0 device revision: bit 7 to bit 0 are used for device revision downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 27 mcp98244 5.1.7 resolution register this register allows the user to change the sensor resolution (see section 5.2.4 ?temperature resolution? ). the por default resolution is 0.25c. the selected resolution is also reflected in the capability register (see register 5-2 ). note: in order to prevent accidentally writing the resolution register to higher resolution and exceeding the maximum temperature conversion time of t conv = 125 ms, a shutdown command (using the config register) is required to change the resolution register. the device must be in shutdown mode to change the resolution. register 5-8: resolution register ? 0000 1001b r/w-1 u-0 u-0 u-0 u-0 u-0 u-0 u-0 bit 15 bit 8 u-0 u-0 u-0 u-0 u-0 u-0 r/w-0 r/w-1 resolution bit 7 bit 0 legend: r = readable bit w = writable bit u = unimplemented bit, read as 0 -n = value at por 1 = bit is set 0 = bit is cleared x = bit is unknown bit 15 unimplemented: read as 1 bit 14-2 unimplemented: read as 0 bit 1-0 resolution: 00 = lsb = 0.5c (t conv = 23 ms typical) 01 = lsb = 0.25c (power up default, t conv = 46 ms typical) 10 = lsb = 0.125c (t conv = 75 ms typical) 11 = lsb = 0.0625c (t conv = 150 ms typical) downloaded from: http:///
mcp98244 ds22327c-page 28 ? 2012-2013 microchip technology inc. 5.2 sensor feature description 5.2.1 shutdown mode shutdown mode disables all power-consuming activities (including temperature sampling operations) while leaving the serial interface active. this mode is selected by setting bit 8 of config to 1 . in this mode, the device consumes i shdn . it remains in this mode until bit 8 is cleared 0 to enable continuous conversion mode, or until power is recycled. the shutdown bit (bit 8) cannot be set to 1 while bits 6 and 7 of config (lock bits) are set to 1 . however, it can be cleared 0 or returned to continuous conversion while locked. in shutdown mode, all registers can be read or written. however, the serial bus activity increases the shutdown current. if the device is shutdown while the event pin is asserted, then the event output will be deasserted during shutdown. it will remain deasserted until the device is enabled for normal operation. once the device is enabled, it takes t conv before the device reasserts the event output. 5.2.2 temperature hysteresis (t hyst ) a hysteresis of 0c, 1.5c, 3c or 6c can be selected for the t upper , t lower and t crit temperate boundaries using bits 10 and 9 of config. the hysteresis applies for decreasing temperature only (hot to cold), or as temperature drifts below the specified limit. the hysteresis bits can not be changed if either of the lock bits, bits 6 and 7 of config, are set to 1 . the t upper , t lower and t crit boundary conditions are described graphically in figure 5-9 . 5.2.3 event output configuration the event output can be enabled using bit 3 of config (event output control bit) and can be configured as either a comparator output or as interrupt output mode using bit 0 of config (event mode). the polarity can also be specified as an active-high or active-low using bit 1 of config (event polarity). the event output requires a pull-up resistor to function. these configurations are designed to serve processors with low-to-high or high-to-low edge triggered inputs. with active-high configuration, when the event output deasserts, power will be dissipated across the pull-up resistor. when the ambient temperature increases above the critical temperature limit, the event output is forced to a comparator output (regardless of bit 0 of config). when the temperature drifts below the critical temperature limit minus hysteresis, the event output automatically returns to the state specified by bit 0 of config. the status of the event output can be read using bit 4 of config (event status). this bit can not be set to 1 in shutdown mode. bits 7 and 6 of the config register can be used to lock the t upper , t lower and t crit registers. the bits prevent false triggers at the event output due to an accidental rewrite to these registers. the event output can also be used as a critical temperature output using bit 2 of config (critical output only). when this feature is selected, the event output becomes a comparator output. in this mode, the interrupt output configuration (bit 0 of config) is ignored. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 29 mcp98244 5.2.3.1 comparator mode comparator mode is selected using bit 0 of config. in this mode, the event output is asserted as active-high or active-low using bit 1 of config. figure 5-9 shows the conditions that toggle the event output. if the device enters shutdown mode with asserted event output, the output will deassert. it will remain deasserted until the device enters continuous conver- sion mode and after the first temperature conversion is completed, t conv . after the initial temperature conver- sion, t a must satisfy the t upper or t lower boundary conditions in order for event output to be asserted. comparator mode is useful for thermostat-type applications, such as turning on a cooling fan or triggering a system shutdown when the temperature exceeds a safe operating range. 5.2.3.2 interrupt mode in the interrupt mode, the event output is asserted as active-high or active-low (depending on the polarity configuration) when t a drifts above or below t upper and t lower limits. the output is de asserted by setting bit 5 (interrupt clear) of config. if the device enters shutdown mode with asserted event output, the output will deassert. it will remain deasserted until the device enters continuous conversion mode and after the first temperature conversion is completed, t conv . if the inter- rupt clear bit (bit 5) is never set, then the event output will reassert after the first temperature conversion. in addition, if t a t crit the event output is forced as comparator mode and asserts until t a < t crit - t hyst . while the event output is asserted, the user must send the clear interrupt command (bit 5 of config) for event output to deassert, when temperature drops below the critical limit, t a < t crit - t hyst . otherwise, event output remains asserted (see figure 5-9 for a graphical descrip- tion). switching from interrupt mode to comparator mode also deasserts event output. this mode is designed for interrupt-driven microcontrol- ler-based systems. the microcontroller receiving the interrupt will have to acknowledge the interrupt by setting bit 5 of config register from the mcp98244. 5.2.4 temperature resolution the mcp98244 device is capable of providing tem- perature data with 0.5c to 0.0625c resolution. the resolution can selected using the resolution register ( register 5-8 ) which is located in address 00001001 b. this address location is not specified in jedec standard jc42.4. however, it provides additional flexibility while being functionally compatible with jc42.4 and provides a 0.25c resolution at 125 ms (max.). in order to prevent accidentally chang- ing the resolution and exceeding the 125 ms conver- sion time, the device must be in shutdown mode to change this register. the selected resolution can be read by user using bit 4 and bit 3 of the capability reg- ister ( register 5-2 ). a 0.25c resolution is set as por default by factory. table 5-2: temperature conversion time resolution t conv (ms) samples/sec (typical) 0.5c 30 33 0.25c (power-up default) 65 15 0.125c 130 8 0.0625c 260 4 downloaded from: http:///
mcp98244 ds22327c-page 30 ? 2012-2013 microchip technology inc. figure 5-9: event output condition. t upper t lower event output t crit t a t upper - t hyst (active-low) comparator interrupt s/w int. clear critical only t crit - t hyst 1 2 3 4 5 7 table 5-3: temperature event output conditions note output boundary conditions comparator interrupt critical t a bits output state (active low/high) 15 14 13 1t a ?? t lower high/low low/high high/low 0 0 0 2t a ? t lower - t hyst low/high low/high high/low 0 0 1 3t a ?? t upper low/high low/high high/low 0 1 0 4 t a ? t upper - t hyst high/low low/high high/low 0 0 0 5 t a ? t crit low/high low/high low/high 1 1 0 6 when t a ?? t crit the event output is forced to comparator mode and bits 0 of config (event output mode) is ignored until t a ? t crit - t hyst . in the interrupt mode, if interrupt is not cleared (bits 5 of config) as shown in the diagram at note 6 , then event will remain asserted at note 7 until interrupt is cleared by the controller. 7t a ? t crit - t hyst low/high high/low high/low 0 1 0 t lower - t hyst t lower -t hyst t upper - t hyst 1 3 4 2 note: 6 event output (active-high) comparator interrupt s/w int. clear critical only downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 31 mcp98244 5.3 mcp98244 eeprom feature description 5.3.1 byte write to write a byte in the mcp98244 eeprom, the master has to specify the memory location or address. once the address byte is transmitted correctly followed by a word address, the word address is stored in the eeprom address pointer. the following byte is data to be stored in the specified memory location. figure 5-10 shows the timing diagram. figure 5-10: timing diagram for byte write (see section 4.0 ?serial communication? ). sda ac k 1010 a ac k s 2 a 1 a 0 12345678 12345678 scl address byte w mcp98244 mcp98244 ac k p 12345678 data word address mcp98244 xxxxx xx x x x xxx xxx downloaded from: http:///
mcp98244 ds22327c-page 32 ? 2012-2013 microchip technology inc. 5.3.2 page write the write address byte, word address and the first data byte are transmitted to the mcp98244 in the same way as in a byte write. instead of generating a stop condition, the master transmits up to 15 additional data bytes to the mcp98244, which are temporarily stored in the on-chip page buffer and will be written into the memory after the master has transmitted a stop condition. upon receipt of each word, the four lower order address pointer bits are internally incremented by one. the higher order four bits of the word address remain constant. if the master should transmit more than 16 bytes prior to generating the stop condition, the address counter will roll over and the previously received data will be overwritten. as with the byte write operation, once the stop condition is received, an internal write cycle will begin ( figure 5-11 ). figure 5-11: timing diagram for page write (see section 4.0 ?serial communication? ). note: page write operations are limited to writing bytes within a single physical page, regardless of the number of bytes actually being written. physical page boundaries start at addresses that are integer multiples of the page buffer size (or page size) and end at addresses that are integer multiples of [page size - 1]. if a page write command attempts to write across a physical page boundary, the result is that the data wraps around to the beginning of the current page (overwriting data previously stored there), instead of being written to the next page, as might be expected. it is therefore necessary for the application software to prevent page write operations that would attempt to cross a page boundary. sda ac k 1010 a xxxx ac k s 2 a 1 a 0 12345678 12345678 scl x address byte w mcp98244 mcp98244 data at (n) ac k p 12345678 12345678 data at (n+1) word address (n) mcp98244 mcp98244 xxx xxxxx xxx xxxxx xxx ac k data at (n+15) mcp98244 xxx xxx ac k note: n is the initial address for a page. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 33 mcp98244 5.3.3 bank or page selection for eeprom read/write operation there are two 256 byte banks or pages in this device (512 bytes total). the pages are selected using i 2 c set page address (spa) command byte of 0110 1100 for bank/page 0 and 0110 1110 for bank/page 1, see ta b l e 5 - 5 . the current page status can be read using the read page address (rpa) command. if the device ack or nak the command, then the current page is 0 or 1, respectively. table 5-4: selecting 256 byte banks or pages for eeprom read/write figure 5-12: timing diagram for bank/page selection (see section 4.0 ?serial communication? ) eeprom function operation address byte a0 pin voltage mcp98244 output address code slave address 1 r/w a2 a1 a0 set bank/page address 0 (spa0) write 0110 1 1 0 0 v dd , v ss , v hv ack, page 0 set set bank/page address 1 (spa1) write 0110 1 1 1 0 v dd , v ss , v hv ack, page 1 set read bank/page address (rpa) read 0110 1 1 0 1 v dd , v ss , v hv ack for page 0 nak for page 1 note 1: a0, a1, a2 address pin states are ignored. sda ac k 0110 ac k s 12345678 12345678 scl address byte w mcp98244 mcp98244 ac k p 12345678 data word address mcp98244 xxxxx xxx xxxxx xxx 11x downloaded from: http:///
mcp98244 ds22327c-page 34 ? 2012-2013 microchip technology inc. 5.3.4 write protection the mcp98244 has a software write-protect (swp) feature that allows a 128-byte block to be write-pro- tected. there are four 128-byte blocks. each block is write protected individually. the write-protected area can be cleared by sending clear write protect (cwp) commands for each block. to access write protection, the device address code of the address byte is set to 0110 instead of 1010 . in this mode, the slave address pins are ignored. once the device is write protected it will not acknowledge any write commands to the protected block. table 5-5 shows the corresponding address bytes for the write- protect feature. 5.3.4.1 swp/rps the swp (software write protect) feature is invoked by writing a command byte as shown on tab l e 5 - 5 . it can be cleared using the cwp command. in this mode, the slave address pins are ignored. a high voltage v hv needs to be applied to the a0 pin. rps (read protec- tion status) can be executed to read protection status. 5.3.4.2 cwp (clear write protect) the cwp feature is invoked by writing clear write-pro- tect command. a high voltage v hv needs to be applied to the a0 pin and once the command is executed bank/ page 0 and bank/page 1 are cleared. tab le 5 - 5 shows the bit configuration. table 5-5: device slave address during write protection (swp/cwp) figure 5-13: timing diagram for setting software write protect (see section 4.0 ?serial communication? ). eeprom function operation address byte 23 a0 pin voltage address code 2 slave address 1 , 2 r/w a2 a1 a0 swp 0 /rps 0 bank/page 0, block 0 00h to 7fh swp 0 ? write 0110 0 0 1 0 v hv rps 0 ? read 4 1 v dd , v ss , v hv swp 1 /rps 1 bank/page 0, block 1 80h to ffh swp 1 ? write 0110 1 0 0 0 v hv rps 1 ? read 4 1 v dd , v ss , v hv swp 2 /rps 2 bank/page 1, block 2 00h to 7fh swp 2 ? write 0110 1 0 1 0 v hv rps 2 ? read 4 1 v dd , v ss , v hv swp 3 /rps 3 bank/page 1, block 3 80h to ffh swp 3 ? write 0110 0 0 0 0 v hv rps 3 ? read 4 1 v dd , v ss , v hv cwp (clear all pages) write 0110 0 1 1 0 v hv note 1: the slave address bits for each block are not binary increments for compatibility. 2: for address code <0110> the a0, a1, a2 states are ignored. 3: all address bytes, other than those indicated below, are ignored by the device. 4: the device will nak if protected and ack if it is unprotected. sda ac k 0110 ac k s 12345678 12345678 scl address byte w mcp98244 mcp98244 ac k p 12345678 data word address mcp98244 xxxxx xxx xxxxx xxx xxx downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 35 mcp98244 table 5-6: device response when writing data or accessing swp n /cwp/spa n 2 status command ack address ack data byte ack stop cmd 3 write/clear cycle not protected swp n / c w pa c ky e s y e s swp n /cwp ack 0xxx 1 a c ky e s y e s swp n /cwp ack 0xxx ack 0xxx ack yes yes page/byte write ack address ack data ack yes yes protected swp n nak 0xxx nak 0xxx nak no c w p a c ky e s y e s cwp ack 0xxx ack yes yes cwp ack 0xxx ack 0xxx ack yes yes page/byte write ack address ack data nak yes no protected or not protected spa 0,1 ack yes/no 4 no spa 0,1 ack 0xxx ack no spa 0,1 ack 0xxx ack 0xxx ack no note 1: 0xxx is defined as dont care byte. 2: n or n = 1, 2, 3, and 4 which describes the eeprom block number as shown in tab le 5 - 5 . 3: i 2 c stop command is necessary to execute the instructions. 4: the device responds spa 0,1 commands with ack, therefore stop command is not necessary. table 5-7: device response when rpa/rps n 1 1 status command ack address ack data byte ack stop cmd 2 not protected rps n ack 0xff nak 0xff nak yes/no protected rps n nak 0xff nak 0xff nak yes/no protected or not protected rpa 0 ack 0xff nak 0xff nak yes/no rpa 1 nak 0xff nak 0xff nak yes/no note 1: n or n = 1, 2, 3, and 4 which describes the eeprom block number as shown in tab le 5 - 5 . 2: since the responses to these read commands are output on the 9th bit, stop command is not necessary. downloaded from: http:///
mcp98244 ds22327c-page 36 ? 2012-2013 microchip technology inc. 5.3.5 read operation read operations are initiated in the same way as write operations, with the exception that the r/w bit of the slave address is set to 1 . there are three basic types of read operations: current address read, random read and sequential read. 5.3.5.1 current address read the mcp98244 contains an address counter that maintains the address of the last word accessed, internally incremented by 1 . therefore, if the previous access (either a read or write operation) was to address n , the next current address read operation would access data from address n+1 . upon receipt of the slave address with r/w bit set to 1 , the mcp98244 issues an acknowledge and transmits the 8-bit data word. the master will not acknowledge (nak) the transfer but does generate a stop condition and the mcp98244 discontinues transmission ( figure 5-14 ). figure 5-14: reading current word address (see section 4.0 ?serial communication? ). 1010 a ac k na k s p 2 a 1 a 0 12345678 12345678 address byte current word address r mcp98244 master sda scl 00000 000 note: in this example, the current word address is the previously accessed address location n plus 1. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 37 mcp98244 5.3.5.2 random read random read operations allow the master to access any memory location in a random manner. to perform this type of read operation, the word address must first be set. this is done by sending the word address to the mcp98244 as part of a write operation. once the word address is sent, the master generates a start condition following the acknowledge. this terminates the write operation, but not before the internal address pointer is set. the master then issues the address byte again, but with the r/w bit set to a 1 . the mcp98244 then issues an acknowledge and transmits the 8-bit data word. the master will not acknowledge the transfer but does generate a stop condition and the mcp98244 discontinues transmission ( figure 5-15 ). figure 5-15: timing diagram for random read (see section 4.0 ?serial communication? ). sda ac k 1010 a word address (n) 0000 ac k s 2 a 1 a 0 12345678 12345678 scl 0 address byte mcp98244 mcp98244 w 000 1010 a ac k na k s p 2 a 1 a 0 12345678 12345678 address byte data at (n) r mcp98244 master sda scl xxxxx xxx note: in this example, n is the current address word which 00h and the data is the byte at address n. downloaded from: http:///
mcp98244 ds22327c-page 38 ? 2012-2013 microchip technology inc. 5.3.5.3 sequential read sequential reads are initiated in the same way as a random read, with the exception that after the mcp98244 transmits the first data byte, the master issues an acknowledge, as opposed to a stop condition in a random read. this directs the mcp98244 to transmit the next sequentially addressed 8-bit word ( figure 5-16 ). to provide sequential reads, the mcp98244 contains an internal address pointer, which is incremented by one at the completion of each operation. this address pointer allows the entire memory contents to be serially read during one operation. figure 5-16: timing diagram for sequential read (see section 4.0 ?serial communication? ). 5.3.6 standby mode the design will incorporate a low-power standby mode (i shdn ). standby mode will be entered after a normal termination of any operation and after all internal functions are complete. this would include any error conditions occurring, such as improper number of clock cycles or improper instruction byte as defined previously. sda ac k 1010 a xxxx ac k s 2 a 1 a 0 12345678 12345678 scl x address byte r mcp98244 master data at (n+1) ac k 12345678 12345678 data at (n+2) data (n) 1 master master xxx xxxxx xxx xxxxx xxx data at (n+m) (1) xxx xxx ac k note 1: n is the initial address location and m is the final address location (n+m < 256) na k p master downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 39 mcp98244 5.4 summary of power-on default the mcp98244 has an internal power-on reset (por) circuit. if the power supply voltage v dd glitches down to the v por_ts and v por_ee thresholds, the device resets the registers to the power-on default settings. table 5-8 shows the power-on default summary for the temperature sensor. the eeprom resets the address pointer to 0x00 hex. table 5-8: mcp98244 temperature sensor power-on reset defaults registers default register data (hexadecimal) power-up default register description address (hexadecimal) register name 0x00 capability 0x00ef event output deasserts in shutdown i 2 c time out 25 ms to 35 ms accepts v hv at a0 pin 0.25c measurement resolution measures temperature below 0c 1c accuracy over active range temperature event output 0x01 config 0x0000 comparator mode active-low output event and critical output output disabled event not asserted interrupt cleared event limits unlocked critical limit unlocked continuous conversion 0c hysteresis 0x02 t upper 0x0000 0c 0x03 t lower 0x0000 0c 0x04 t crit 0x0000 0c 0x05 t a 0x0000 0c 0x06 manufacturer id 0x0054 0x07 tse2004av device id/ device revision 0x2201 0x08 microchip device id/ device revision 0x2201 0x09 resolution 0x0001 0.25c measurement resolution downloaded from: http:///
mcp98244 ds22327c-page 40 ? 2012-2013 microchip technology inc. notes: downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 41 mcp98244 6.0 applications information 6.1 layout considerations the mcp98244 device does not require any additional components besides the master controller in order to measure temperature. however, it is recommended that a decoupling capacitor of 0.1 f to 1 f be used between the v dd and gnd pins. a high-frequency ceramic capacitor is recommended. it is necessary for the capacitor to be located as close as possible to the power and ground pins of the device in order to provide effective noise protection. in addition, good pcb layout is key for better thermal conduction from the pcb temperature to the sensor die. for good temperature sensitivity, add a ground layer under the device pins as shown in figure 6-1 . 6.2 thermal considerations a potential for self-heating errors can exist if the mcp98244 sda, sclk and event lines are heavily loaded with pull-ups (high current). typically, the self- heating error is negligible because of the relatively small current consumption of the mcp98244. a temperature accuracy error of approximately 0.5c could result from self-heating if the communication pins sink/source the maximum current specified. for example, if the event output is loaded to maximum i ol , equation 6-1 can be used to determine the effect of self-heating. equation 6-1: effect of self- heating at room temperature (t a = +25c) with maximum i dd = 500 a and v dd = 3.6v, the self-heating due to power dissipation t ? is 0.58c for the tdfn-8 pack- age. figure 6-1: dfn package layout. t ? ? ja v dd i dd v ol_event i ol_event v ol_sda i ol_sda ? + ? + ? ?? = where: t ? =t j - t a t j = junction temperature t a = ambient temperature ? ja = package thermal resistance v ol_event, sda = event and sda output v ol (0.4 v max ) i ol_event, sda = event and sda output i ol (3 ma max and 20 ma max, respectively) a0a1 a2 gnd v dd event scl sda ep9 downloaded from: http:///
mcp98244 ds22327c-page 42 ? 2012-2013 microchip technology inc. notes: downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 43 mcp98244 7.0 packaging information 7.1 package marking information legend: xx...x customer-specific information y year code (last digit of calendar year) yy year code (last 2 digits of calendar year) ww week code (week of january 1 is week 01) nnn alphanumeric traceability code pb-free jedec designator for matte tin (sn) * this package is pb-free. the pb-free jedec designator ( ) can be found on the outer packaging for this package. note : in the event the full microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. 3 e 3 e example: 8-lead 2x3 tdfn abr 244 25 part number code mcp98244t-be/mny abr downloaded from: http:///
mcp98244 ds22327c-page 44 ? 2012-2013 microchip technology inc. note: for the most current package drawings, please see the microchip packaging specification located at http://www.microchip.com/packaging downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 45 mcp98244 note: for the most current package drawings, please see the microchip packaging specification located at http://www.microchip.com/packaging downloaded from: http:///
mcp98244 ds22327c-page 46 ? 2012-2013 microchip technology inc. downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 47 mcp98244 appendix a: revision history revision c (may 2013) the following is the list of modifications: 1. updated the operating voltage range from v dd = 2.2v to 3.6v to v dd = 1.7v to 3.6v. 2. updated the verbiage throughout the document relevant to the change in v dd range. 3. updated figure 2-1 and figure 2-4 . 4. incremented the silicon revision id from 0x00 to 0x01. revision b (december 2012) the following is the list of modification: updated the temperature range in the serial interface timing specifications table. revision a (december 2012) original release of this document. downloaded from: http:///
mcp98244 ds22327c-page 48 ? 2012-2013 microchip technology inc. notes: downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 49 mcp98244 product identification system to order or obtain information, e. g., on pricing or delivery, refer to the factory or the listed sales office . device: mcp98244t: temperature sensor (tape and reel) temperature range: e = -40c to +125c (extended) package: mny = plastic dual flat, no lead, (2x3 tdfn), 8-lead (tdfn) part no. /xx package temperature range device examples: a) mcp98244t-be/mny: tape and reel, extended temp., 8ld 2x3 tdfn package x grade -x downloaded from: http:///
mcp98244 ds22327c-page 50 ? 2012-2013 microchip technology inc. notes: downloaded from: http:///
? 2012-2013 microchip technology inc. ds22327c-page 51 information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. microchip makes no representations or warranties of any kind whether express or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fitness for purpose . microchip disclaims all liability arising from this information and its use. use of microchip devices in life support and/or safety applications is entirely at the buyers risk, and the buyer agrees to defend, indemnify and hold harmless microchip from any and all damages, claims, suits, or expenses resulting from such use. no licenses are conveyed, implicitly or otherwise, under any microchip intellectual property rights. trademarks the microchip name and logo, the microchip logo, dspic, flashflex, k ee l oq , k ee l oq logo, mplab, pic, picmicro, picstart, pic 32 logo, rfpic, sst, sst logo, superflash and uni/o are registered trademarks of microchip technology incorporated in the u.s.a. and other countries. filterlab, hampshire, hi-tech c, linear active thermistor, mtp, seeval and the embedded control solutions company are registered trademarks of microchip technology incorporated in the u.s.a. silicon storage technology is a registered trademark of microchip technology inc. in other countries. analog-for-the-digital age, app lication maestro, bodycom, chipkit, chipkit logo, codeguard, dspicdem, dspicdem.net, dspicworks, dsspeak, ecan, economonitor, fansense, hi-tide, in-circuit serial programming, icsp, mindi, miwi, mpasm, mpf, mplab certified logo, mplib, mplink, mtouch, omniscient code generation, picc, picc-18, picdem, picdem.net, pickit, pictail, real ice, rflab, select mode, sqi, serial quad i/o, total endurance, tsharc, uniwindriver, wiperlock, zena and z-scale are trademarks of microchip technology incorporated in the u.s.a. and other countries. sqtp is a service mark of microchip technology incorporated in the u.s.a. gestic and ulpp are registered trademarks of microchip technology germany ii gmbh & co. kg, a subsidiary of microchip technology inc., in other countries. all other trademarks mentioned herein are property of their respective companies. ? 2012-2013, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. isbn: 978-1-62077-220-1 note the following details of the code protection feature on microchip devices: microchip products meet the specification cont ained in their particular microchip data sheet. microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions. there are dishonest and possibly illegal methods used to breach the code protection feature. all of these methods, to our knowledge, require using the microchip products in a manner outside the operating specif ications contained in microchips data sheets. most likely, the person doing so is engaged in theft of intellectual property. microchip is willing to work with the customer who is concerned about the integrity of their code. neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as unbreakable. code protection is constantly evolving. we at microchip are co mmitted to continuously improvin g the code protection features of our products. attempts to break microchips code protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona; gresham, oregon and design centers in california and india. the company?s quality system processes and procedures are for its pic ? mcus and dspic ? dscs, k ee l oq ? code hopping devices, serial eeproms, microperipherals, nonvolatile memory an d analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified. quality management s ystem certified by dnv == iso/ts 16949 == downloaded from: http:///
ds22327c-page 52 ? 2012-2013 microchip technology inc. americas corporate office 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7200 fax: 480-792-7277 technical support: http://www.microchip.com/ support web address: www.microchip.com atlanta duluth, ga tel: 678-957-9614 fax: 678-957-1455 boston westborough, ma tel: 774-760-0087 fax: 774-760-0088 chicago itasca, il tel: 630-285-0071 fax: 630-285-0075 cleveland independence, oh tel: 216-447-0464 fax: 216-447-0643 dallas addison, tx tel: 972-818-7423 fax: 972-818-2924 detroit farmington hills, mi tel: 248-538-2250 fax: 248-538-2260 indianapolis noblesville, in tel: 317-773-8323 fax: 317-773-5453 los angeles mission viejo, ca tel: 949-462-9523 fax: 949-462-9608 santa clara santa clara, ca tel: 408-961-6444 fax: 408-961-6445 toronto mississauga, ontario, canada tel: 905-673-0699 fax: 905-673-6509 asia/pacific asia pacific office suites 3707-14, 37th floor tower 6, the gateway harbour city, kowloon hong kong tel: 852-2401-1200 fax: 852-2401-3431 australia - sydney tel: 61-2-9868-6733 fax: 61-2-9868-6755 china - beijing tel: 86-10-8569-7000 fax: 86-10-8528-2104 china - chengdu tel: 86-28-8665-5511 fax: 86-28-8665-7889 china - chongqing tel: 86-23-8980-9588 fax: 86-23-8980-9500 china - hangzhou tel: 86-571-2819-3187 fax: 86-571-2819-3189 china - hong kong sar tel: 852-2943-5100 fax: 852-2401-3431 china - nanjing tel: 86-25-8473-2460 fax: 86-25-8473-2470 china - qingdao tel: 86-532-8502-7355 fax: 86-532-8502-7205 china - shanghai tel: 86-21-5407-5533 fax: 86-21-5407-5066 china - shenyang tel: 86-24-2334-2829 fax: 86-24-2334-2393 china - shenzhen tel: 86-755-8864-2200 fax: 86-755-8203-1760 china - wuhan tel: 86-27-5980-5300 fax: 86-27-5980-5118 china - xian tel: 86-29-8833-7252 fax: 86-29-8833-7256 china - xiamen tel: 86-592-2388138 fax: 86-592-2388130 china - zhuhai tel: 86-756-3210040 fax: 86-756-3210049 asia/pacific india - bangalore tel: 91-80-3090-4444 fax: 91-80-3090-4123 india - new delhi tel: 91-11-4160-8631 fax: 91-11-4160-8632 india - pune tel: 91-20-2566-1512 fax: 91-20-2566-1513 japan - osaka tel: 81-6-6152-7160 fax: 81-6-6152-9310 japan - tokyo tel: 81-3-6880- 3770 fax: 81-3-6880-3771 korea - daegu tel: 82-53-744-4301 fax: 82-53-744-4302 korea - seoul tel: 82-2-554-7200 fax: 82-2-558-5932 or 82-2-558-5934 malaysia - kuala lumpur tel: 60-3-6201-9857 fax: 60-3-6201-9859 malaysia - penang tel: 60-4-227-8870 fax: 60-4-227-4068 philippines - manila tel: 63-2-634-9065 fax: 63-2-634-9069 singapore tel: 65-6334-8870 fax: 65-6334-8850 taiwan - hsin chu tel: 886-3-5778-366 fax: 886-3-5770-955 taiwan - kaohsiung tel: 886-7-213-7828 fax: 886-7-330-9305 taiwan - taipei tel: 886-2-2508-8600 fax: 886-2-2508-0102 thailand - bangkok tel: 66-2-694-1351 fax: 66-2-694-1350 europe austria - wels tel: 43-7242-2244-39 fax: 43-7242-2244-393 denmark - copenhagen tel: 45-4450-2828 fax: 45-4485-2829 france - paris tel: 33-1-69-53-63-20 fax: 33-1-69-30-90-79 germany - munich tel: 49-89-627-144-0 fax: 49-89-627-144-44 italy - milan tel: 39-0331-742611 fax: 39-0331-466781 netherlands - drunen tel: 31-416-690399 fax: 31-416-690340 spain - madrid tel: 34-91-708-08-90 fax: 34-91-708-08-91 uk - wokingham tel: 44-118-921-5869 fax: 44-118-921-5820 worldwide sales and service 11/29/12 downloaded from: http:///

▲Up To Search▲

Price & Availability of MCP98244T-BEMNYAA

	To Download MCP98244T-BEMNYAA Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .