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? semiconductor components industries, llc, 2009 december, 2009 ? rev. 4 1 publication order number: adt7484a ? 86a/d adt7484a/adt7486a digital temperature sensor with sst interface the adt7484a/adt7486a are simple digital temperature sensors for use in pc applications with a simple serial transport (sst) interface. these devices can monitor their own temperature as well as the temperature of one (adt7484a) or two (adt7486a) remote sensor diodes. the adt7484a/adt7486a are controlled by a single sst bidirectional data line. the devices are fixed-address sst clients where the target address is chosen by the state of the two address pins, add0 and add1. features ? 1 on-chip temperature sensor ? 1 or 2 remote temperature sensors ? simple serial transport (sst ) interface rev 1 compliant ? these are pb ? free devices applications ? personal computers ? portable personal devices ? industrial sensor nets marking diagrams http://onsemi.com see detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ordering information msop ? 10 case 846ac 1 1 soic ? 8 case 751 t7484a alyw 1 8 msop ? 8 case 846ab 1 pin assignments (top view) v cc 1 gnd 2 d1+ 3 d1? 4 sst 8 add0 7 reserved 6 add1 5 adt7484a (top view) v cc 1 gnd 2 d1+ 3 d1? 4 d2+ 5 sst 10 add0 9 reserved 8 add1 7 d2? 6 adt7486a t22 ayw 1 10 1 8 t20 ayw t2x = specific device code a = assembly location y = year w = work week = pb ? free package (note: microdot may be in either location) a = assembly location l = wafer lot y = year w = work week = pb ? free package
adt7484a/adt7486a http://onsemi.com 2 figure 1. functional block diagram sst interface analog mux (adt7486a only) offset registers address selection digital mux local temperature value register remote temperature value register a/d converter on ? chip temperature sensor d1+ d2? v dd gnd reserved adt7484a/ adt7486a sst add1 add0 d1? d2+ absolute maximum ratings parameter rating unit supply voltage (v cc ) 3.6 v voltage on any other pin (including sst pin) 3.6 v input current at any pin 5.0 ma package input current 20 ma maximum junction temperature (t j max) 150 c storage temperature range ? 65 to +150 c lead temperature, soldering ir reflow peak temperature lead temperature, soldering (10 sec) 260 300 c esd rating 1500 v stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. note: this device is esd sensitive. use standard esd precautions when handling. thermal characteristics package type ja jc unit 8 ? lead msop and 8 ? lead soic nb packages (adt7484a) 10 ? lead msop (adt7486a) 206 44 c/w note: ja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages.
adt7484a/adt7486a http://onsemi.com 3 adt7484a pin assignment pin no. mnemonic type description 1 v cc power supply 3.3 v 10%. 2 gnd ground ground pin. 3 d1+ analog input positive connection to remote temperature sensor. 4 d1 ? analog input negative connection to remote temperature sensor. 5 add1 digital input sst address select. 6 reserved reserved connect to ground. 7 add0 digital input sst address select. 8 sst digital input/output sst bidirectional data line. adt7486a pin assignment pin no. mnemonic type description 1 v cc power supply 3.3 v 10%. 2 gnd ground ground pin. 3 d1+ analog input positive connection to remote 1 temperature sensor. 4 d1 ? analog input negative connection to remote 1 temperature sensor. 5 d2+ analog input positive connection to remote 2 temperature sensor. 6 d2 ? analog input negative connection to remote 2 temperature sensor. 7 add1 analog input sst address select. 8 reserved analog input connect to ground. 9 add0 digital input sst address select. 10 sst digital input/output sst bidirectional data line. electrical characteristics (t a = t min to t max , = v cc = v min to v max , unless otherwise noted) parameter conditions min typ max unit power supply supply voltage, v cc 3.0 3.3 3.6 v undervoltage lockout threshold 2.8 v average operating supply current, i dd continuous conversions 3.8 5.0 ma temperature-to-digital converter local sensor accuracy 40 c t a 70 c, v cc = 3.3 v 5% +1.0 1.75 c ? 40 c t a +100 c 4.0 c remote sensor accuracy ? 40 c t d +125 c; t a = 25 c; v cc = 3.3 v 1.0 c ? 40 c t d +125 c; ? 40 t a 70 c, v cc = 3.3 v 5% +1.0 1.75 c ? 40 c t d +125 c; ? 40 t a +100 c 4.0 c remote sensor source current low level mid level high level 12 80 204 a resolution 0.016 c series resistance cancellation the adt7484a and adt7486a cancel 1.5 k in series with the remote thermal diode 1.5 k 1. guaranteed by design, not production tested. 2. minimum and maximum bit times are relative to t bit defined in the timing negotiation pulse. 3. devices compatible with hold time specification as driven by sst originator.
adt7484a/adt7486a http://onsemi.com 4 electrical characteristics (t a = t min to t max , = v cc = v min to v max , unless otherwise noted) parameter unit max typ min conditions temperature-to-digital converter conversion time (local temperature) (note 1) averaging enabled 12 12 ms conversion time (remote temperature) (note 1) averaging enabled 38 ms total monitoring cycle time (note 1) averaging enabled 50 ms digital inputs (add0, add1) input high voltage, v ih 2.3 v input low voltage, v il 0.8 v input high current, i ih v in = v cc ? 1.0 a input low current, i il v in = 0 1.0 a pin capacitance 5.0 pf digital i/o (sst pin) input high voltage, v ih 1.1 v input low voltage, v il 0.4 v hysteresis (note 1) between input switching levels 150 mv output high voltage, v oh i source = 6 ma (maximum) 1.1 1.9 v high impedance state leakage, i leak device powered on sst bus; v sst = 1.1 v, v cc = 3.3 v 1.0 a high impedance state leakage, i leak device unpowered on sst bus; v sst = 1.1 v, v cc = 0 v 10 a signal noise immunity, v noise noise glitches from 10 mhz to 100 mhz; width up to 50 ns 300 mv p-p sst timing bitwise period, t bit 0.495 500 s high level time for logic 1, t h1 (note 2) t bit defined in speed negotiation 0.6 x t bit 0.75 x t bit 0.8 x t bit s high level time for logic 0, t h0 (note 2) 0.2 x t bit 0.25 x t bit 0.4 x t bit s time to assert sst high for logic 1, t su, high 0.2 x t bit s hold time, t hold (note 3) see sst specification rev 1.0 0.5 x t bit ? m s stop time, t stop device responding to a constant low level driven by originator 1.25 x t bit 2 x t bit 2 x t bit s time to respond after a reset, t reset 0.4 ms response time to speed negotiation after powerup time after powerup when device can participate in speed negotiation 500 s 1. guaranteed by design, not production tested. 2. minimum and maximum bit times are relative to t bit defined in the timing negotiation pulse. 3. devices compatible with hold time specification as driven by sst originator.
adt7484a/adt7486a http://onsemi.com 5 typical characteristics figure 2. sst o/p level vs. supply voltage figure 3. supply current vs. temperature figure 4. local temperature error figure 5. sst o/p level vs. temperature figure 6. supply current vs. voltage figure 7. remote temperature error 1.55 1.20 2.6 v cc (v) sst o/p (v) 1.50 1.45 1.40 1.35 1.30 1.25 2.8 3.0 3.2 3.4 3.6 750? (~2ma) 270? (~5.2ma) 120? (~10.6ma) ?45 temperature ( c) i dd (ma) ?25 ?5 15 35 55 75 95 115 dev3 dev2 dev1 3.45 3.46 3.47 3.48 3.49 3.50 3.51 3.52 3.53 3.54 3.55 3.56 7 ?1 ?60 140 temperature ( c) temperature error ( c) 6 5 4 3 2 1 0 ?40 ?20 0 20 40 60 80 100 120 lo spec (v cc = 3.6v) mean (v cc = 3.3v) hi spec (v cc = 3v) 1.55 1.20 ?50 150 temperature ( c) sst o/p (v) 1.50 1.45 1.40 1.35 1.30 1.25 0 50 100 120? (~10.6ma) 270? (~5.2ma) 750? (~2ma) 3.9 2.65 3.65 v cc (v) i dd (ma) 3.7 3.5 3.3 3.1 2.9 2.85 3.05 3.25 3.45 dev1 dev3 dev2 7 ?2 ?60 140 temperature ( c) temperature error ( c) ?40 ?20 0 20 40 60 80 100 120 6 5 4 3 2 1 hi spec (v cc = 3v) lo spec (v cc = 3.6v) mean (v cc = 3.3v)
adt7484a/adt7486a http://onsemi.com 6 typical characteristics figure 8. remote temperature error vs. pcb resistance figure 9. temperature error vs. common-mode noise frequency figure 10. local temperature error vs. power supply noise figure 11. remote temperature error vs. capacitance between d1+ and d1 ? figure 12. temperature error vs. differential-mode noise frequency figure 13. remote temperature error vs. power supply noise 15 ?40 0 100 resistance (m?) error (c) 10 5 ?10 ?15 ?20 ?25 ?30 ?35 20 40 60 80 d+ to gnd dev2_ext2 dev3_ext1 dev3_ext2 dev1_ext1 dev1_ext2 dev2_ext1 dev1_ext1 dev1_ext2 dev2_ext1 dev2_ext2 dev3_ext1 dev3_ext2 d+ to v cc 30 ?5 10k 1g noise frequency ( c) temperature error ( c) 25 20 15 10 5 0 100k 1m 10m 100m 40mv 60mv 100mv 20 ?10 10k 1g power supply noise frequency (hz) temperature error ( c) 15 10 100k 1m 10m 100m 125mv 50mv 5 0 ? 5 0 ?90 050 capacitance (nf) error ( c) ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 10 20 30 40 ext1 ext2 7 0 10k 1g noise frequency ( c) temperature error ( c) 100k 1m 10m 100m 6 5 4 3 2 1 10mv 40mv 20mv 5 ?3 10k 1g power supply noise frequency (hz) temperature error ( c) 100k 1m 10m 100m 125mv 50mv 4 ?2 3 2 1 0 ?1
adt7484a/adt7486a http://onsemi.com 7 product description the adt7484a is a single remote temperature sensor, and the adt7486a is a dual temperature sensor for use in pc applications. the adt7484a/adt7486a accurately measure local and remote temperature and communicate over a one-wire simple serial t ransport (sst) bus interface. sst interface simple serial t ransport (sst) is a one-wire serial bus and a communications protocol between components intended for use in personal computers, personal handheld devices, or other industrial sensor nets. the adt7484a/adt7486a support sst specification rev 1. sst is a licensable bus technology from analog devices, inc., and intel corporation. to inquire about obtaining a copy of the simple serial transport specification or an sst technology license, please email analog devices, at sst_licensing@analog.com or write to analog devices, 3550 north first street, san jose, ca 95134, attention: sst licensing, m/s b7-24. adt7484a/adt7486a client address the client address for the adt7484a/adt7486a is selected using the address pin. the address pin is connected to a float detection circuit, which allows the adt7484a/ adt7486a to distinguish between three input states: high, low (gnd), and floating. the address range for fixed address, discoverable devices is 0x48 to 0x50. table 1. adt7484a/adt7486a selectable addresses add1 add0 address selected low (gnd) low (gnd) 0x48 low (gnd) float 0x49 low (gnd) high 0x4a float low (gnd) 0x4b float float 0x4c float high 0x4d high low (gnd) 0x4e high float 0x4f high high 0x50 command summary table 7 summarizes the commands supported by the adt7484a/adt7486a devices when directed at the target address selected by the fixed address pins. it contains the command name, command code (cc), write data length (wl), read data length (rl), and a brief description. table 2. command code summary command command code, cc write length, wl read length, rl description ping() 0x00 0x00 0x00 shows a nonzero fcs over the header if present. getinttemp() 0x00 0x01 0x02 shows the temperature of the device?s internal thermal diode. getext1temp() 0x01 0x01 0x02 shows the temperature of external thermal diode 1. getext2temp() 0x02 0x01 0x02 shows the temperature of external thermal diode 2 (adt7486a only). getalltemps() 0x00 0x01 0x04 (adt7484a) 0x06 (adt7486a) shows a 4- or 6-byte block of data (adt7484a: getinttemp, getext1temp; adt7486a: getinttemp, getext1temp, getext2temp). setext1offset() 0xe0 0x03 0x00 sets the offset used to correct errors in external diode 1. getext1offset() 0xe0 0x01 0x02 shows the offset that the device is using to correct errors in external diode 1. setext2offset() 0xe1 0x03 0x00 sets the offset used to correct errors in external diode 2 (adt7486a only). getext2offset() 0xe1 0x01 0x02 shows the offset that the device is using to correct errors in external diode 2 (adt7486a only). resetdevice() 0xf6 0x01 0x00 functional reset. the adt7484a/adt7486a also re- spond to this command when directed to the target ad- dress 0x00. getdib() 0xf7 0xf7 0x01 0x01 0x08 0x10 shows information used by sw to identify the device?s capabilities. can be in 8- or 16-byte format.
adt7484a/adt7486a http://onsemi.com 8 command code details adt7484a/adt7486a device identifier block the getdib() command retrieves the device identifier block (dib), which provides information to identify the capabilities of the adp7484a/adt7486a. the data returned can be in 8 ? or 16 ? byte format. the full 16 ? bytes of dib is detailed in table 3. the 8-byte format involves the first eight bytes described in this table. byte-sized data is returned in the respective fields as it appears in table 3. word-sized data, including vendor id, device id, and data values use little endian format, that is, the lsb is returned first, followed by the msb. table 3. dib byte details byte name value description 0 device capabilities 0xc0 fixed address device 1 version/ revision 0x10 meets version 1 of the sst specification 2, 3 vendor id 00x11d4 contains company id number in little endian format 4, 5 device id 0x7484 or 0x7486 contains device id number in little endian format 6 device interface 0x01 sst device 7 function interface 0x00 reserved 8 reserved 0x00 reserved 9 reserved 0x00 reserved 10 reserved 0x00 reserved 11 reserved 0x00 reserved 12 reserved 0x00 reserved 13 reserved 0x00 reserved 14 revision id 0x05 contains revision id 15 client device address 0x48 to 0x50 dependent on the state of the address pins ping() the ping() command verifies if a device is responding at a particular address. the adt7484a/adt7486a show a valid nonzero fcs in response to the ping() command when correctly addressed. table 4. ping() command target address write length read length fcs device address 0x00 0x00 resetdevice() this command resets the register map and conversion controller. the reset command can be global or directed at the client address of the adt7484a/adt7486a. table 5. reset device() command target address write length read length reset command fcs device address 0x01 0x00 0xf6 getinttemp() the adt7484a/adt7486a show the local temperature of the device in response to the getintt emp() command. the data has a little endian, 16-bit, twos complement format. getexttemp() prompted by the getexttemp() command, the adt7484a/adt7486a show the temperature of the remote diode in little endian, 16-bit, twos complement format. the adt7484a/adt7486a show 0x8000 in response to this command if the external diode is an open or short circuit. getalltemps() the adt7484a shows the local and remote temperatures in a 4-byte block of data (internal temperature first, followed by external temperature 1) in response to a getallt emps() command. the adt7486a shows the local and remote temperatures in a 6-byte block of data (internal temperature first, followed by external temperature 1 and external temperature 2) in response to this command. setextoffset() this command sets the offset that the adt7484a/ adt7486a will use to correct errors in the external diode. the offset is set in little endian, 16-bit, twos complement format. the maximum offset is 128 c with +0.25 c resolution. getextoffset() this command causes the adt7484a/adt7486a to show the offset that they are using to correct errors in the external diode. the offset value is returned in little endian format, that is, lsb before msb. adt7484a/adt7486a response to unsupported commands a full list of command codes supported by the adt7484a/adt7486a is given in table 7. the offset registers (command codes 0xe0 and 0xe1) are the only registers that the user can write to. the other defined registers are read only. writing to register addresses 0x03 to 0xdf shows a valid fsc, but no action is taken by the adt7484a/adt7486a. the adt7484a/adt7486a show an invalid fsc if the user attempts to write to the devices between command codes 0xe2 to 0xee and no data is written to the device. these registers are reserved for the manufacturer?s use only, and no data can be written to the device via these addresses.
adt7484a/adt7486a http://onsemi.com 9 temperature measurement the adt7484a/adt7486a each have two dedicated temperature measurement channels: one for measuring the temperature of an on-chip band gap temperature sensor, and one for measuring the temperature of a remote diode, usually located in the cpu or gpu. the adt7484a monitors one local and one remote temperature channel, whereas the adt7486a monitors one local and two remote temperature channels. monitoring of each of the channels is done in a round-robin sequence. the monitoring sequence is in the order shown in table 11. table 6. temperature monitoring sequence channel number measurement conversion time (ms) 0 local temperature 12 1 remote temperature 1 38 2 remote temperature 2 (adt7486a only) 38 temperature measurement method a simple method for measuring temperature is to exploit the negative temperature coefficient of a diode by measuring the base-emitter voltage (v be ) of a transistor operated at constant current. unfortunately, this technique requires calibration to null the effect of the absolute value of v be , which varies from device to device. the technique used in the adt7484a/adt7486a measures the change in v be when the device is operated at three different currents. figure 16 shows the input signal conditioning used to measure the output of a remote temperature sensor. this figure shows the remote sensor as a substrate transistor, which is provided for temperature monitoring on some microprocessors, but it could also be a discrete transistor. if a discrete transistor is used, the collector is not grounded and should be linked to the base. to prevent ground noise from interfering with the measurement, the more negative terminal of the sensor is not referenced to ground, but is biased above ground by an internal diode at the d1 ? input. if the sensor is operating in an extremely noisy environment, c1 can be added as a noise filter. its value should not exceed 1000 pf. to measure v be , the operating current through the sensor is switched between three related currents. figure 16 shows n1 x i and n2 x i as dif ferent multiples of the current i. the currents through the temperature diode are switched between i and n1 x i, giving v be1 , and then between i and n2 x i, giving v be2 . the temperature can then be calculated using the two v be measurements. this method can also cancel the effect of series resistance on the temperature measurement. the resulting v be waveforms are passed through a 65 khz low-pass filter to remove noise and then through a chopper-stabilized amplifier to amplify and rectify the waveform, producing a dc voltage proportional to v be . the adc digitizes this voltage, and a temperature measurement is produced. to reduce the effects of noise, digital filtering is performed by averaging the results of 16 measurement cycles for low conversion rates. signal conditioning and measurement of the internal temperature sensor is performed in the same manner. figure 14. signal conditioning for remote diode temperature sensors c1* d+ bias diode *capacitor c1 is optional. it should only be used in noisy environments. v dd to adc v out+ v out? remote sensing transistor d? i n1 x i n2 x i i bias low ? pass filter f c = 65khz reading temperature measurements the temperature measurement command codes are detailed in table 12. the temperature data returned is two bytes in little endian format, that is, lsb before msb. all temperatures can be read together by using command code 0x00 with a read length of 0x04. the command codes and returned data are described in table 12. table 7. temperature channel command codes temp channel command code returned data internal 0x00 lsb, msb external 1 0x01 lsb, msb external 2 0x02 lsb, msb all temps 0x00 internal lsb, internal msb; external 1 lsb, external 1 msb; external 2 lsb, external 2 msb
adt7484a/adt7486a http://onsemi.com 10 sst temperature sensor data format the data for temperature is structured to allow values in the range of 512 c to be reported. thus, the temperature sensor format uses a twos complement, 16-bit binary value to represent values in this range. this format allows temperatures to be represented with approximately a 0.016 c resolution. table 8. sst temperature data format temperature ( c) twos complement msb lsb ? 125 ? 80 ? 40 ? 20 ? 5 ? 1 0 +1 +5 +20 +40 +80 +125 1110 0000 1110 1100 1111 0110 1111 1011 1111 1110 1111 1111 0000 0000 0000 0000 0000 0001 0000 0100 0000 1010 0001 0100 0001 1111 1100 0000 0000 0000 0000 0000 0011 1110 1100 0000 1100 0000 0000 0000 0100 0000 0100 0000 1100 0010 0000 0000 0000 0000 0100 0000 using discrete transistors if a discrete transistor is used, the collector is not grounded and should be linked to the base. if a pnp transistor is used, the base is connected to the d1 ? input and the emitter is connected to the d1+ input. if an npn transistor is used, the emitter is connected to the d1 ? input and the base is connected to the d1+ input. figure 17 shows how to connect the adt7484a/adt7486a to an npn or pnp transistor for temperature measurement. to prevent ground noise from interfering with the measurement, the more negative terminal of the sensor is not referenced to ground, but is biased above ground by an internal diode at the d1 ? input. figure 15. connections for npn and pnp transistors d+ d? adt7484a/ adt7486a 2n3904 npn d+ d? adt7484a/ adt7486a 2n3906 pnp the adt7484a/adt7486a show an external temperature value of 0x8000 if the external diode is an open or short circuit. layout considerations digital boards can be electrically noisy environments. take the following precautions to protect the analog inputs from noise, particularly when measuring the very small voltages from a remote diode sensor: ? place the device as close as possible to the remote sensing diode. provided that the worst noise sources, such as clock generators, data/address buses, and crts, are avoided, this distance can be four to eight inches. ? route the d1+ and d1 ? tracks close together in parallel with grounded guard tracks on each side. provide a ground plane under the tracks if possible. ? use wide tracks to minimize inductance and reduce noise pickup. a 5 mil track minimum width and spacing is recommended. figure 16. arrangements of signal tracks 5mil 5mil 5mil 5mil 5mil 5mil 5mil gnd d+ gnd d? ? try to minimize the number of copper/solder joints, which can cause thermocouple effects. where copper/solder joints are used, make sure that they are in both the d1+ and d1 ? paths and are at the same temperature. ? thermocouple effects should not be a major problem because 1 c corresponds to about 240 v, and thermocouple voltages are about 3 v/ c of the temperature difference. unless there are two thermocouples with a big temperature differential between them, thermocouple voltages should be much less than 200 mv. ? place a 0.1 f bypass capacitor close to the device. ? if the distance to the remote sensor is more than eight inches, the use of a twisted-pair cable is recommended. this works for distances of about 6 to 12 feet. ? for very long distances (up to 100 feet), use shielded twisted-pair cables, such as belden #8451 microphone cables. connect the twisted-pair cable to d1+ and d1 ? and the shield to gnd, close to the device. leave the remote end of the shield unconnected to avoid ground loops. because the measurement technique uses switched current sources, excessive cable and/or filter capacitance can affect the measurement. when using long cables, the filter capacitor can be reduced or removed. cable resistance can also introduce errors. a 1 series resistance introduces about 0.5 c error.
adt7484a/adt7486a http://onsemi.com 11 temperature offset as cpus run faster, it is more difficult to avoid high frequency clocks when running the d1+ and d1 ? tracks around a system board. even when the recommended layout guidelines are followed, there may still be temperature errors, attributed to noise being coupled on to the d1+ and d1 ? lines. high frequency noise generally has the effect of producing temperature measurements that are consistently too high by a specific amount. the adt7484a/ adt87486a have a temperature offset command code of 0xe0 through which a desired offset can be set. by doing a one ? time calibration of the system, the offset caused by system board noise can be calculated and nulled by specifying it in the adt7484a/adt7486a. the offset is automatically added to every temperature measurement. the maximum offset is 128 c with 0.25 c resolution. the offset format is the same as the temperature data format; 16 ? bit, twos complement notation, as shown in table 8. the offset should be programmed in little endian format, that is, lsb before msb. the offset value is also returned in little endian format when read. application schematics figure 17. adt7484a typical application schematic v cc v cc 1 gnd 2 d1+ 3 d1? 4 sst 8 add0 7 reserved 6 add1 5 adt7484a 2n3904 or cpu thermal diode sst figure 18. adt7486a typical application schematic v cc 1 2 3 4 v cc gnd d1+ d1? d2+ 5 10 9 8 7 reserved add1 d2? 6 adt7486a cpu thermal diode 2n3904 npn sst sst add0 ordering information device order number* branding package option package type shipping ? adt7484aarz-reel ? r ? 8 soic ? 8 nb 2500 tape & reel adt7484aarz-rl7 ? r ? 8 soic ? 8 nb 1000 tape & reel adt7484aarmz-rl t20 rm ? 8 8-lead msop 3000 tape & reel adt7484aarmz-r7 t20 rm ? 8 8-lead msop 1000 tape & reel adt7486aarmz-rl t22 rm ? 10 10-lead msop 3000 tape & reel ADT7486AARMZ-R7 t22 rm ? 10 10-lead msop 1000 tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. *these are pb ? free packages.
adt7484a/adt7486a http://onsemi.com 12 package dimensions seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 6. 751 ? 01 thru 751 ? 06 are obsolete. new standard is 751 ? 07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ? x ? ? y ? g m y m 0.25 (0.010) ? z ? y m 0.25 (0.010) z s x s m 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* soic ? 8 nb case 751 ? 07 issue aj
adt7484a/adt7486a http://onsemi.com 13 package dimensions s b m 0.08 (0.003) a s t notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. 846a-01 obsolete, new standard 846a-02. b e pin 1 id 8 pl 0.038 (0.0015) ? t ? seating plane a a1 c l dim a min nom max min millimeters ?? ?? 1.10 ?? inches a1 0.05 0.08 0.15 0.002 b 0.25 0.33 0.40 0.010 c 0.13 0.18 0.23 0.005 d 2.90 3.00 3.10 0.114 e 2.90 3.00 3.10 0.114 e 0.65 bsc l 0.40 0.55 0.70 0.016 ?? 0.043 0.003 0.006 0.013 0.016 0.007 0.009 0.118 0.122 0.118 0.122 0.026 bsc 0.021 0.028 nom max 4.75 4.90 5.05 0.187 0.193 0.199 h e h e d d e msop8 case 846ab ? 01 issue o *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 8x 8x 6x mm inches scale 8:1 1.04 0.041 0.38 0.015 5.28 0.208 4.24 0.167 3.20 0.126 0.65 0.0256
adt7484a/adt7486a http://onsemi.com 14 package dimensions msop10 case 846ac ? 01 issue o s b m 0.08 (0.003) a s t dim min max min max inches millimeters a 2.90 3.10 0.114 0.122 b 2.90 3.10 0.114 0.122 c 0.95 1.10 0.037 0.043 d 0.20 0.30 0.008 0.012 g 0.50 bsc 0.020 bsc h 0.05 0.15 0.002 0.006 j 0.10 0.21 0.004 0.008 k 4.75 5.05 0.187 0.199 l 0.40 0.70 0.016 0.028 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension ?a? does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension ?b? does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. 846b ? 01 obsolete. new standard 846b ? 02 ? b ? ? a ? d k g pin 1 id 8 pl 0.038 (0.0015) ? t ? seating plane c h j l mm inches scale 8:1 10x 10x 8x 1.04 0.041 0.32 0.0126 5.28 0.208 4.24 0.167 3.20 0.126 0.50 0.0196 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 adt7484a ? 86a/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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