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1. general description the pca9552 led blinker blinks leds in i 2 c-bus and smbus applications where it is necessary to limit bus traf?c or free up the i 2 c-bus master's (mcu, mpu, dsp, chip set, etc.) timer. the uniqueness of this device is the internal oscillator with two programmable blink rates. to blink leds using normal i/o expanders like the pcf8574 or pca9554, the bus master must send repeated commands to turn the led on and off. this greatly increases the amount of traf?c on the i 2 c-bus and uses up one of the master's timers. the pca9552 led blinker instead requires only the initial setup command to program blink rate 1 and blink rate 2 (that is, the frequency and duty cycle) for each individual output. from then on, only one command from the bus master is required to turn each individual open-drain output on, off, or to cycle at blink rate 1 or blink rate 2. maximum output sink current is 25 ma per bit and 200 ma per package. any bits not used for controlling the leds can be used for general purpose parallel input/output (gpio) expansion. the active low hardware reset pin ( reset) and power-on reset (por) initializes the registers to their default state, all zeroes, causing the bits to be set high (led off). three hardware address pins on the pca9552 allow eight devices to operate on the same bus. 2. features n 16 led drivers (on, off, ?ashing at a programmable rate) n 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.172 hz and 44 hz (5.82 seconds and 0.023 seconds) n input/outputs not used as led drivers can be used as regular gpios n internal oscillator requires no external components n i 2 c-bus interface logic compatible with smbus n internal power-on reset n noise ?lter on scl/sda inputs n active low reset input n 16 open-drain outputs directly drive leds to 25 ma n edge rate control on outputs n no glitch on power-up n supports hot insertion n low standby current n operating power supply voltage range of 2.3 v to 5.5 v n 0 hz to 400 khz clock frequency pca9552 16-bit i 2 c-bus led driver with programmable blink rates rev. 05 9 march 2006 product data sheet
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 2 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates n esd protection exceeds 2000 v hbm per jesd22-a114, 150 v mm per jesd22-a115 and 1000 v cdm per jesd22-c101 n latch-up testing is done to jedec standard jesd78 which exceeds 100 ma n packages offered: so24, tssop24, hvqfn24 3. ordering information 4. block diagram table 1: ordering information t amb = - 40 c to +85 c type number topside mark package name description version pca9552d pca9552d so24 plastic small outline package; 24 leads; body width 7.5 mm sot137-1 pca9552pw pca9552 tssop24 plastic thin shrink small outline package; 24 leads; body width 4.4 mm sot355-1 PCA9552BS 9552 hvqfn24 plastic thermal enhanced very thin quad ?at package; no leads; 24 terminals; body 4 4 0.85 mm sot616-1 remark: only one i/o shown for clarity. fig 1. block diagram of pca9552 a0 a1 a2 002aac168 i 2 c-bus control input filters pca9552 power-on reset scl sda v dd v ss ledn reset oscillator prescaler 1 register prescaler 0 register pwm1 register pwm0 register input register led select (lsn) register blink0 blink1 1 0
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 3 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 5. pinning information 5.1 pinning fig 2. pin con?guration for so24 fig 3. pin con?guration for tssop24 fig 4. pin con?guration for hvqfn24 pca9552d a0 v dd a1 sda a2 scl led0 reset led1 led15 led2 led14 led3 led13 led4 led12 led5 led11 led6 led10 led7 led9 v ss led8 002aac165 1 2 3 4 5 6 7 8 9 10 11 12 14 13 16 15 18 17 20 19 22 21 24 23 v dd sda scl reset led15 led14 led13 led12 led11 led10 led9 led8 pca9552pw 002aac166 1 2 3 4 5 6 7 8 9 10 11 12 14 13 16 15 18 17 20 19 22 21 24 23 a0 a1 a2 led0 led1 led2 led3 led4 led5 led6 led7 v ss 002aac167 PCA9552BS transparent top view led11 led4 led5 led12 led3 led13 led2 led14 led1 led15 led0 reset led6 led7 v ss led8 led9 led10 a2 a1 a0 v dd sda scl terminal 1 index area 6 13 5 14 4 15 3 16 2 17 1 18 7 8 9 10 11 12 24 23 22 21 20 19
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 4 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 5.2 pin description [1] hvqfn package die supply ground is connected to both v ss pin and exposed center pad. v ss pin must be connected to supply ground for proper device operation. for enhanced thermal, electrical, and board level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the printed-circuit board in the thermal pad region. table 2: pin description symbol pin description so24, tssop24 hvqfn24 a0 1 22 address input 0 a1 2 23 address input 1 a2 3 24 address input 2 led0 4 1 led driver 0 led1 5 2 led driver 1 led2 6 3 led driver 2 led3 7 4 led driver 3 led4 8 5 led driver 4 led5 9 6 led driver 5 led6 10 7 led driver 6 led7 11 8 led driver 7 v ss 12 9 [1] ground supply led8 13 10 led driver 8 led9 14 11 led driver 9 led10 15 12 led driver 10 led11 16 13 led driver 11 led12 17 14 led driver 12 led13 18 15 led driver 13 led14 19 16 led driver 14 led15 20 17 led driver 15 reset 21 18 active low reset input scl 22 19 serial clock line sda 23 20 serial data line v dd 24 21 supply voltage
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 5 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 6. functional description refer to figure 1 bloc k diag r am of pca9552 . 6.1 device address following a start condition, the bus master must output the address of the slave it is accessing. the address of the pca9552 is shown in figure 5 . to conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled high or low. the last bit of the address byte de?nes the operation to be performed. when set to logic 1 a read is selected, while a logic 0 selects a write operation. 6.2 control register following the successful acknowledgement of the slave address, the bus master will send a byte to the pca9552, which will be stored in the control register. this register can be read and written via the i 2 c-bus. the lowest 3 bits are used as a pointer to determine which register will be accessed. if the auto-increment ?ag (ai) is set, the four low order bits of the control register are automatically incremented after a read or write. this allows the user to program the registers sequentially. the contents of these bits will rollover to 0000 after the last register is accessed. when the auto-increment ?ag is set (ai = 1) and a read sequence is initiated, the sequence must start by reading a register different from 0' (b3 b2 b1 b0 1 0000). only the 4 least signi?cant bits are affected by the ai ?ag. unused bits must be programmed with zeroes. fig 5. pca9552 address 002aac169 1 1 0 0 a2 a1 a0 r/w fixed slave address programmable reset state: 00h fig 6. control register 002aac170 0 0 0 ai b3 b2 b1 b0 register address auto-increment flag
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 6 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 6.2.1 control register de?nition 6.3 register descriptions 6.3.1 input0 - input register 0 the input register 0 re?ects the state of the device pins (inputs led0 to led7). writes to this register will be acknowledged but will have no effect. remark: the default value x is determined by the externally applied logic level (normally logic 1) when used for directly driving led with pull-up to v dd . 6.3.2 input1 - input register 1 the input register 1 re?ects the state of the device pins (inputs led8 to led15). writes to this register will be acknowledged but will have no effect. remark: the default value x is determined by the externally applied logic level (normally logic 1) when used for directly driving led with pull-up to v dd . table 3: register summary b3 b2 b1 b0 symbol access description 0000 input0 read only input register 0 0001 input1 read only input register 1 0010 psc0 read/write frequency prescaler 0 0011 pwm0 read/write pwm register 0 0100 psc1 read/write frequency prescaler 1 0101 pwm1 read/write pwm register 1 0110ls0 read/write led0 to led3 selector 0111ls1 read/write led4 to led7 selector 1000ls2 read/write led8 to led11 selector 1001ls3 read/write led12 to led15 selector table 4: input0 - input register 0 description bit 7 6 5 4 3 2 1 0 symbol led7 led6 led5 led4 led3 led2 led1 led0 default xxxxxxxx table 5: input1 - input register 1 description bit 7 6 5 4 3 2 1 0 symbol led15 led14 led13 led12 led11 led10 led9 led8 default xxxxxxxx
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 7 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 6.3.3 pcs0 - frequency prescaler 0 psc0 is used to program the period of the pwm output. the period of blink0 = (psc0 + 1) / 44. 6.3.4 pwm0 - pulse width modulation 0 the pwm0 register determines the duty cycle of blink0. the outputs are low (led off) when the count is less than the value in pwm0 and high when it is greater. if pwm0 is programmed with 00h, then the pwm0 output is always low. the duty cycle of blink0 = (256 - pwm0) / 256. 6.3.5 pcs1 - frequency prescaler 1 psc1 is used to program the period of the pwm output. the period of blink1 = (psc1 + 1) / 44. 6.3.6 pwm1 - pulse width modulation 1 the pwm1 register determines the duty cycle of blink1. the outputs are low (led off) when the count is less than the value in pwm1 and high when it is greater. if pwm1 is programmed with 00h, then the pwm1 output is always low. the duty cycle of blink1 = (256 - pwm1) / 256. table 6: psc0 - frequency prescaler 0 register description bit 7 6 5 4 3 2 1 0 symbol psc0[7] psc0[6] psc0[5] psc0[4] psc0[3] psc0[2] psc0[1] psc0[0] default 11111111 table 7: pwm0 - pulse width modulation 0 register description bit 7 6 5 4 3 2 1 0 symbol pwm0 [7] pwm0 [6] pwm0 [5] pwm0 [4] pwm0 [3] pwm0 [2] pwm0 [1] pwm0 [0] default 10000000 table 8: psc1 - frequency prescaler 1 register description bit 7 6 5 4 3 2 1 0 symbol psc1[7] psc1[6] psc1[5] psc1[4] psc1[3] psc1[2] psc1[1] psc1[0] default 11111111 table 9: pwm1 - pulse width modulation 1 register description bit 7 6 5 4 3 2 1 0 symbol pwm1 [7] pwm1 [6] pwm1 [5] pwm1 [4] pwm1 [3] pwm1 [2] pwm1 [1] pwm1 [0] default 10000000
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 8 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 6.3.7 ls0 to ls3 - led selector registers the lsn led select registers determine the source of the led data. 00 = output is set low (led on) 01 = output is set high-impedance (led off; default) 10 = output blinks at pwm0 rate 11 = output blinks at pwm1 rate table 10: ls0 to ls3 - led selector registers bit description legend: * default value register bit value description ls0 - led0 to led3 selector ls0 7:6 01* led3 selected 5:4 01* led2 selected 3:2 01* led1 selected 1:0 01* led0 selected ls1 - led4 to led7 selector ls1 7:6 01* led7 selected 5:4 01* led6 selected 3:2 01* led5 selected 1:0 01* led4 selected ls2 - led8 to led11 selector ls2 7:6 01* led11 selected 5:4 01* led10 selected 3:2 01* led9 selected 1:0 01* led8 selected ls3 - led12 to led15 selector ls3 7:6 01* led15 selected 5:4 01* led14 selected 3:2 01* led13 selected 1:0 01* led12 selected
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 9 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 6.4 pins used as gpios led pins not used to control leds can be used as general purpose i/os (gpios). for use as input, set ledn to high-impedance (01) and then read the pin state via the input register. for use as output, connect external pull-up resistor to the pin and size it according to the dc recommended operating characteristics. led output pin is high when the output is programmed as high-impedance, and low when the output is programmed low through the led selector register. the output can be pulse-width controlled when pwm0 or pwm1 are used. 6.5 power-on reset when power is applied to v dd , an internal power-on reset (por) holds the pca9552 in a reset condition until v dd has reached v por . at that point, the reset condition is released and the pca9552 registers are initialized to their default states. thereafter, v dd must be lowered below 0.2 v to reset the device. 6.6 external reset a reset can be accomplished by holding the reset pin low for a minimum of t w(rst) . the pca9552 registers and i 2 c-bus state machine will be held in their default states until the reset input is once again high. this input requires a pull-up resistor to v dd if no active connection is used.
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 10 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 7. characteristics of the i 2 c-bus the i 2 c-bus is for 2-way, 2-line communication between different ics or modules. the two lines are a serial data line (sda) and a serial clock line (scl). both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. data transfer may be initiated only when the bus is not busy. 7.1 bit transfer one data bit is transferred during each clock pulse. the data on the sda line must remain stable during the high period of the clock pulse as changes in the data line at this time will be interpreted as control signals (see figure 7 ). 7.1.1 start and stop conditions both data and clock lines remain high when the bus is not busy. a high-to-low transition of the data line while the clock is high is de?ned as the start condition (s). a low-to-high transition of the data line while the clock is high is de?ned as the stop condition (p) (see figure 8 .) 7.2 system con?guration a device generating a message is a transmitter'; a device receiving is the receiver'. the device that controls the message is the master' and the devices which are controlled by the master are the slaves' (see figure 9 ). fig 7. bit transfer mba607 data line stable; data valid change of data allowed sda scl fig 8. de?nition of start and stop conditions mba608 sda scl p stop condition sda scl s start condition
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 11 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 7.3 acknowledge the number of data bytes transferred between the start and the stop conditions from transmitter to receiver is not limited. each byte of eight bits is followed by one acknowledge bit. the acknowledge bit is a high level put on the bus by the transmitter, whereas the master generates an extra acknowledge related clock pulse. a slave receiver which is addressed must generate an acknowledge after the reception of each byte. also a master must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. the device that acknowledges has to pull down the sda line during the acknowledge clock pulse, so that the sda line is stable low during the high period of the acknowledge related clock pulse; set-up and hold times must be taken into account. a master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. in this event, the transmitter must leave the data line high to enable the master to generate a stop condition. fig 9. system con?guration 002aaa966 master transmitter/ receiver slave receiver slave transmitter/ receiver master transmitter master transmitter/ receiver sda scl i 2 c-bus multiplexer slave fig 10. acknowledgement on the i 2 c-bus 002aaa987 s start condition 9 8 2 1 clock pulse for acknowledgement not acknowledge acknowledge data output by transmitter data output by receiver scl from master
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 12 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 7.4 bus transactions fig 11. write to register 0 a s slave address start condition r/w acknowledge from slave 002aac185 0 0 ai b3 b2 b1 b0 0 command byte a acknowledge from slave 12345678 scl 9 sda data 1 a write to register data out from port t v(q) acknowledge from slave data 1 valid data to register 1 0 0 a2 a1 a0 1 fig 12. read from register 1 0 0 a2 a1 a0 0 a s1 start condition r/w acknowledge from slave 002aac186 a acknowledge from slave sda a p acknowledge from master data from register data (first byte) slave address stop condition s (repeated) start condition (cont.) (cont.) 1 0 0 a2 a1 a0 1 a 1 r/w acknowledge from slave slave address at this moment master-transmitter becomes master-receiver and slave-receiver becomes slave-transmitter na no acknowledge from master data from register data (last byte) command byte 0 0 ai b3 b2 b1 0b0 auto-increment register address if ai = 1 remark: this ?gure assumes the command byte has previously been programmed with 00h. fig 13. read input port register 1 0 0 a2 a1 a0 1 a s1 start condition r/w acknowledge from slave 002aac187 a acknowledge from master sda na read from port data into port p t h(d) data from port no acknowledge from master data from port data 4 slave address data 1 stop condition data 2 data 3 data 4 t su(d)
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 13 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 8. application design-in information 8.1 minimizing i dd when the i/o is used to control leds when the i/os are used to control leds, they are normally connected to v dd through a resistor as shown in figure 15 . since the led acts as a diode, when the led is off the i/o v i is about 1.2 v less than v dd . the supply current, i dd , increases as v i becomes lower than v dd and is speci?ed as d i stb in t ab le 13 static char acter istics . designs needing to minimize current consumption, such as battery power applications, should consider maintaining the i/o pins greater than or equal to v dd when the led is off. figure 15 shows a high value resistor in parallel with the led. figure 16 shows v dd less than the led supply voltage by at least 1.2 v. both of these methods maintain the input/output v i at or above v dd and prevents additional supply current consumption when the led is off. led0 to led12 are used as led drivers. led13 to led15 are used as regular gpios. fig 14. typical application pca9552 led0 led1 sda scl reset 5 v i 2 c-bus/smbus master 002aac188 sda scl v dd a2 a1 a0 v ss 5 v 10 k w (3 ) led2 led3 led4 led5 led6 led7 led8 led9 led10 led11 led12 led13 led14 led15 gpios
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 14 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 8.2 programming example the following example will show how to set led0 to led3 on. it will then set led4 and led5 to blink at 1 hz at a 50 % duty cycle. led6 and led7 will be set to blink at 4 hz and at a 25 % duty cycle. led8 to led15 will be set to off. fig 15. high value resistor in parallel with the led fig 16. device supplied by a lower voltage 002aac189 led v dd ledn 100 k w v dd 002aac190 led v dd ledn 3.3 v 5 v table 11: programming pca9552 program sequence i 2 c-bus start s pca9552 address with a0 to a2 = low c0h psc0 subaddress + auto-increment 12h set prescaler psc0 to achieve a period of 1 second: psc0 = 43 2bh set pwm0 duty cycle to 50 %: pwm0 = 128 80h set prescaler pcs1 to achieve a period of 0.25 seconds: psc1 = 10 0ah set pwm1 output duty cycle to 25 %: pwm1 = 192 c0h set led0 to led3 on 00h set led4 and led5 to pwm0, and led6 or led7 to pwm1 fah set led8 to led11 off 55h set led12 to led15 off 55h stop p blink period 1 psc0 1 + 44 ---------------------- - == 256 pwm0 C 256 ------------------------------- - 0.5 = blink period 0.25 psc1 1 + 44 ---------------------- - == 256 pwm1 C 256 ------------------------------- - 0.25 =
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 15 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 9. limiting values 10. static characteristics table 12: limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit v dd supply voltage - 0.5 +6.0 v v i/o voltage on an input/output pin ledn used as an i/o v ss - 0.5 5.5 v i o(ledn) output current on pin ledn ledn used as an i/o - 25 ma i ss ground supply current - 200 ma p tot total power dissipation - 400 mw t stg storage temperature - 65 +150 c t amb ambient temperature operating - 40 +85 c table 13: static characteristics v dd = 2.3 v to 5.5 v; v ss =0v; t amb = - 40 c to +85 c; unless otherwise speci?ed. symbol parameter conditions min typ [1] max unit supply v dd supply voltage 2.3 - 5.5 v i dd supply current operating mode; v dd = 5.5 v; no load; v i =v dd or v ss ; f scl = 100 khz - 350 550 m a i stb standby current standby mode; v dd = 5.5 v; no load; v i =v dd or v ss ; f scl = 0 khz - 2.1 5.0 m a d i stb additional standby current standby mode; v dd = 5.5 v; every led i/o at v i = 4.3 v; f scl = 0 khz --2ma v por power-on reset voltage [2] v dd = 3.3 v; no load; v i =v dd or v ss - 1.7 2.2 v input scl; input/output sda v il low-level input voltage - 0.5 - 0.3v dd v v ih high-level input voltage 0.7v dd - 5.5 v i ol low-level output current v ol = 0.4 v 3 6.5 - ma i l leakage current v i =v dd =v ss - 1- +1 m a c i input capacitance v i =v ss - 4.4 5 pf i/os v il low-level input voltage - 0.5 - 0.8 v v ih high-level input voltage 2.0 - 5.5 v i ol low-level output current v ol = 0.4 v; v dd = 2.3 v [3] 9--ma v ol = 0.4 v; v dd = 3.0 v [3] 12--ma v ol = 0.4 v; v dd = 5.0 v [3] 15--ma v ol = 0.7 v; v dd = 2.3 v [3] 15--ma v ol = 0.7 v; v dd = 3.0 v [3] 20--ma v ol = 0.7 v; v dd = 5.0 v [3] 25--ma i li input leakage current v dd = 3.6 v; v i = 0 v or v dd - 1- +1 m a c io input/output capacitance - 2.6 5 pf
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 16 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates [1] all typical values at 3.3 v and 25 c. [2] v dd must be lowered to 0.2 v in order to reset part. [3] each i/o must be externally limited to a maximum of 25 ma and each octal ([led0 to led7] and [led8 to led15]) must be limited to a maximum current of 100 ma for a device total of 200 ma. select inputs a0, a1, a2; reset v il low-level input voltage - 0.5 - 0.8 v v ih high-level input voltage 2.0 - 5.5 v i li input leakage current - 1- +1 m a c i input capacitance v i =v ss - 2.3 5 pf table 13: static characteristics continued v dd = 2.3 v to 5.5 v; v ss =0v; t amb = - 40 c to +85 c; unless otherwise speci?ed. symbol parameter conditions min typ [1] max unit (1) maximum (2) average (3) minimum (1) maximum (2) average (3) minimum fig 17. typical frequency variation over process at v dd = 2.3 v to 3.0 v fig 18. typical frequency variation over process at v dd = 3.0 v to 5.5 v - 20 % 0 % 20 % percent variation - 40 % t amb ( c) - 40 100 - 20 002aac191 0 20406080 (2) (1) (3) - 20 % 0 % 20 % percent variation - 40 % t amb ( c) - 40 100 - 20 002aac192 0 20406080 (1) (2) (3)
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 17 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 11. dynamic characteristics [1] t vd;ack = time for acknowledgement signal from scl low to sda (out) low. [2] t vd;dat = minimum time for sda data out to be valid following scl low. [3] c b = total capacitance of one bus line in pf. [4] resetting the device while actively communicating on the bus may cause glitches or errant stop conditions. [5] upon reset, the full delay will be the sum of t rst and the rc time constant of the sda bus. table 14: dynamic characteristics symbol parameter conditions standard mode i 2 c-bus fast mode i 2 c-bus unit min max min max f scl scl clock frequency 0 100 0 400 khz t buf bus free time between a stop and start condition 4.7 - 1.3 - m s t hd;sta hold time (repeated) start condition 4.0 - 0.6 - m s t su;sta set-up time for a repeated start condition 4.7 - 0.6 - m s t su;sto set-up time for stop condition 4.0 - 0.6 - m s t hd;dat data hold time 0 - 0 - ns t vd;ack data valid acknowledge time [1] - 600 - 600 ns t vd;dat data valid time low-level [2] - 600 - 600 ns high-level [2] - 1500 - 600 ns t su;dat data set-up time 250 - 100 - ns t low low period of the scl clock 4.7 - 1.3 - m s t high high period of the scl clock 4.0 - 0.6 - m s t f fall time of both sda and scl signals - 300 20 + 0.1c b [3] 300 ns t r rise time of both sda and scl signals - 1000 20 + 0.1c b [3] 300 ns t sp pulse width of spikes that must be suppressed by the input ?lter - 50 - 50 ns port timing t v(q) data output valid time - 250 - 250 ns t su(d) data input setup time 100 - 100 - ns t h(d) data input hold time 1 - 1 - m s reset t w(rst) reset pulse width 10 - 10 - ns t rec(rst) reset recovery time 0 - 0 - ns t rst reset time [4] [5] 400 - 400 - ns
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 18 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates fig 19. de?nition of timing on the i 2 c-bus t sp t buf t hd;sta p p s t low t r t hd;dat t f t high t su;dat t su;sta sr t hd;sta t su;sto sda scl 002aaa986 rise and fall times refer to v il and v ih . fig 20. i 2 c-bus timing diagram scl sda t hd;sta t su;dat t hd;dat t f t buf t su;sta t low t high t vd;ack 002aab175 t su;sto protocol start condition (s) bit 7 msb (a7) bit 6 (a6) bit 0 (r/w) acknowledge (a) stop condition (p) 1 /f scl t r t vd;dat fig 21. reset timing sda scl 002aac193 t rst 50 % 30 % 50 % 50 % 50 % t rec(rst) t w(rst) reset ledn led off start t rst ack or read cycle
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 19 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 12. test information r l = load resistor for ledn. r l for sda and scl > 1 k w (3 ma or less current) c l = load capacitance includes jig and probe capacitance r t = termination resistance should be equal to the output impedance z o of the pulse generators. fig 22. test circuitry for switching times pulse generator v o c l 50 pf r l 500 w 002aab284 r t v i v dd d.u.t. v dd open gnd
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 20 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 13. package outline fig 23. package outline sot137-1 (so24) unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z y w v q references outline version european projection issue date iec jedec jeita mm inches 2.65 0.3 0.1 2.45 2.25 0.49 0.36 0.32 0.23 15.6 15.2 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.1 0.4 sot137-1 x 12 24 w m q a a 1 a 2 b p d h e l p q detail x e z c l v m a 13 (a ) 3 a y 0.25 075e05 ms-013 pin 1 index 0.1 0.012 0.004 0.096 0.089 0.019 0.014 0.013 0.009 0.61 0.60 0.30 0.29 0.05 1.4 0.055 0.419 0.394 0.043 0.039 0.035 0.016 0.01 0.25 0.01 0.004 0.043 0.016 0.01 e 1 0 5 10 mm scale so24: plastic small outline package; 24 leads; body width 7.5 mm sot137-1 99-12-27 03-02-19
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 21 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates fig 24. package outline sot355-1 (tssop24) unit a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec jeita mm 0.15 0.05 0.95 0.80 0.30 0.19 0.2 0.1 7.9 7.7 4.5 4.3 0.65 6.6 6.2 0.4 0.3 8 0 o o 0.13 0.1 0.2 1 dimensions (mm are the original dimensions) notes 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. plastic interlead protrusions of 0.25 mm maximum per side are not included. 0.75 0.50 sot355-1 mo-153 99-12-27 03-02-19 0.25 0.5 0.2 w m b p z e 112 24 13 pin 1 index q a a 1 a 2 l p q detail x l (a ) 3 h e e c v m a x a d y 0 2.5 5 mm scale tssop24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm sot355-1 a max. 1.1
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 22 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates fig 25. package outline sot616-1 (hvqfn24) 0.5 1 0.2 a 1 e h b unit y e references outline version european projection issue date iec jedec jeita mm 4.1 3.9 d h 2.25 1.95 y 1 4.1 3.9 2.25 1.95 e 1 2.5 e 2 2.5 0.30 0.18 c 0.05 0.00 0.05 0.1 dimensions (mm are the original dimensions) sot616-1 mo-220 - - - - - - 0.5 0.3 l 0.1 v 0.05 w 0 2.5 5 mm scale sot616-1 hvqfn24: plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm a (1) max. a a 1 c detail x y y 1 c e l e h d h e e 1 b 712 24 19 18 13 6 1 x d e c b a e 2 01-08-08 02-10-22 terminal 1 index area terminal 1 index area a c c b v m w m 1/2 e 1/2 e e (1) note 1. plastic or metal protrusions of 0.075 mm maximum per side are not included. d (1)
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 23 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 14. handling information inputs and outputs are protected against electrostatic discharge in normal handling. however, to be completely safe you must take normal precautions appropriate to handling integrated circuits. 15. soldering 15.1 introduction to soldering surface mount packages this text gives a very brief insight to a complex technology. a more in-depth account of soldering ics can be found in our data handbook ic26; integrated circuit packages (document order number 9398 652 90011). there is no soldering method that is ideal for all surface mount ic packages. wave soldering can still be used for certain surface mount ics, but it is not suitable for ?ne pitch smds. in these situations re?ow soldering is recommended. 15.2 re?ow soldering re?ow soldering requires solder paste (a suspension of ?ne solder particles, ?ux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. driven by legislation and environmental forces the worldwide use of lead-free solder pastes is increasing. several methods exist for re?owing; for example, convection or convection/infrared heating in a conveyor type oven. throughput times (preheating, soldering and cooling) vary between 100 seconds and 200 seconds depending on heating method. typical re?ow peak temperatures range from 215 cto270 c depending on solder paste material. the top-surface temperature of the packages should preferably be kept: ? below 225 c (snpb process) or below 245 c (pb-free process) C for all bga, htsson..t and ssop..t packages C for packages with a thickness 3 2.5 mm C for packages with a thickness < 2.5 mm and a volume 3 350 mm 3 so called thick/large packages. ? below 240 c (snpb process) or below 260 c (pb-free process) for packages with a thickness < 2.5 mm and a volume < 350 mm 3 so called small/thin packages. moisture sensitivity precautions, as indicated on packing, must be respected at all times. 15.3 wave soldering conventional single wave soldering is not recommended for surface mount devices (smds) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems. to overcome these problems the double-wave soldering method was speci?cally developed. if wave soldering is used the following conditions must be observed for optimal results:
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 24 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates ? use a double-wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave. ? for packages with leads on two sides and a pitch (e): C larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; C smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. the footprint must incorporate solder thieves at the downstream end. ? for packages with leads on four sides, the footprint must be placed at a 45 angle to the transport direction of the printed-circuit board. the footprint must incorporate solder thieves downstream and at the side corners. during placement and before soldering, the package must be ?xed with a droplet of adhesive. the adhesive can be applied by screen printing, pin transfer or syringe dispensing. the package can be soldered after the adhesive is cured. typical dwell time of the leads in the wave ranges from 3 seconds to 4 seconds at 250 c or 265 c, depending on solder material applied, snpb or pb-free respectively. a mildly-activated ?ux will eliminate the need for removal of corrosive residues in most applications. 15.4 manual soldering fix the component by ?rst soldering two diagonally-opposite end leads. use a low voltage (24 v or less) soldering iron applied to the ?at part of the lead. contact time must be limited to 10 seconds at up to 300 c. when using a dedicated tool, all other leads can be soldered in one operation within 2 seconds to 5 seconds between 270 c and 320 c. 15.5 package related soldering information [1] for more detailed information on the bga packages refer to the (lf)bga application note (an01026); order a copy from your philips semiconductors sales of?ce. table 15: suitability of surface mount ic packages for wave and re?ow soldering methods package [1] soldering method wave re?ow [2] bga, htsson..t [3] , lbga, lfbga, sqfp, ssop..t [3] , tfbga, vfbga, xson not suitable suitable dhvqfn, hbcc, hbga, hlqfp, hso, hsop, hsqfp, hsson, htqfp, htssop, hvqfn, hvson, sms not suitable [4] suitable plcc [5] , so, soj suitable suitable lqfp, qfp, tqfp not recommended [5] [6] suitable ssop, tssop, vso, vssop not recommended [7] suitable cwqccn..l [8] , pmfp [9] , wqccn..l [8] not suitable not suitable
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 25 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates [2] all surface mount (smd) packages are moisture sensitive. depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). for details, refer to the drypack information in the data handbook ic26; integrated circuit packages; section: packing methods . [3] these transparent plastic packages are extremely sensitive to re?ow soldering conditions and must on no account be processed through more than one soldering cycle or subjected to infrared re?ow soldering with peak temperature exceeding 217 c 10 c measured in the atmosphere of the re?ow oven. the package body peak temperature must be kept as low as possible. [4] these packages are not suitable for wave soldering. on versions with the heatsink on the bottom side, the solder cannot penetrate between the printed-circuit board and the heatsink. on versions with the heatsink on the top side, the solder might be deposited on the heatsink surface. [5] if wave soldering is considered, then the package must be placed at a 45 angle to the solder wave direction. the package footprint must incorporate solder thieves downstream and at the side corners. [6] wave soldering is suitable for lqfp, qfp and tqfp packages with a pitch (e) larger than 0.8 mm; it is de?nitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. [7] wave soldering is suitable for ssop, tssop, vso and vssop packages with a pitch (e) equal to or larger than 0.65 mm; it is de?nitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. [8] image sensor packages in principle should not be soldered. they are mounted in sockets or delivered pre-mounted on ?ex foil. however, the image sensor package can be mounted by the client on a ?ex foil by using a hot bar soldering process. the appropriate soldering pro?le can be provided on request. [9] hot bar soldering or manual soldering is suitable for pmfp packages. 16. abbreviations table 16: abbreviations acronym description cdm charged device model dsp digital signal processor esd electrostatic discharge hbm human body model gpio general purpose input/output ic integrated circuit i 2 c-bus inter ic bus led light emitting diode mcu microcontroller mm machine model mpu microprocessor por power-on reset pwm pulse width modulation smbus system management bus
pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 26 of 28 philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 17. revision history table 17: revision history document id release date data sheet status change notice doc. number supersedes pca9552_5 20060309 product data sheet - - pca9552_4 modi?cations: ? the format of this data sheet has been redesigned to comply with the new presentation and information standard of philips semiconductors. ? t ab le 1 order ing inf or mation : changed topside mark of tssop24 package from pca9552pw to pca9552 ? t ab le 2 pin descr iption : added t ab le note 1 regarding v ss pin on hvqfn24 package ? section 6.6 exter nal reset : changed symbol t w to t w(rst) ? figure 11 : changed symbol t pv to t v(q) ? figure 13 : changed symbol t ph to t h(d) ; changed symbol t ps to t su(d) ? section 8.1 minimizing i dd when the i/o is used to control leds : C 1st paragraph, 3rd sentence: changed symbol d i dd to d i stb C 2nd paragraph, 4th sentence: changed symbol v in to v i ? t ab le 12 limiting v alues : C changed parameter description of v i/o from dc voltage on an i/o to voltage on an input/output pin C changed symbol i i/o (dc output current on an i/o) to i o(ledn) (output current on pin ledn) ? t ab le 13 static char acter istics : C moved second sentence of description below title to (new) t ab le note 1 and added its reference at column typ C changed symbol d i dd to d i stb C under subsection i/os, changed symbol i l to i li ? t ab le 14 dynamic char acter istics : C updated parameter descriptions C under subsection port timing: changed symbol t pv to t v(q) ; changed symbol t ps to t su(d) ; changed symbol t ph to t h(d) C under subsection reset: changed symbol t w tot w(rst) ; changed symbol t rec tot rec(rst) ; changed symbol t reset to t rst (also in t ab le note 5 ) ? figure 21 reset timing modi?ed to harmonize letter symbols pca9552_4 20041001 product data sheet - 9397 750 13727 pca9552_3 pca9552_3 20030502 product data 853-2374 29857 of 2003 apr 24 9397 750 11463 pca9552_2 pca9552_2 20030224 product data 853-2374 29331 of 2002 dec 20 9397 750 11156 pca9552_1 pca9552_1 20020927 product data 853-2374 28878 of 2002 sep 09 9397 750 10329 -
philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates pca9552_5 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 05 9 march 2006 27 of 28 18. data sheet status [1] please consult the most recently issued data sheet before initiating or completing a design. [2] the product status of the device(s) described in this data sheet may have changed since this data sheet was published. the l atest information is available on the internet at url http://www.semiconductors.philips.com. [3] for data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. 19. de?nitions short-form speci?cation the data in a short-form speci?cation is extracted from a full data sheet with the same type number and title. for detailed information see the relevant data sheet or data handbook. limiting values de?nition limiting values given are in accordance with the absolute maximum rating system (iec 60134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors make no representation or warranty that such applications will be suitable for the speci?ed use without further testing or modi?cation. 20. disclaimers life support these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips semiconductors for any damages resulting from such application. right to make changes philips semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or performance. when the product is in full production (status production), relevant changes will be communicated via a customer product/process change noti?cation (cpcn). philips semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise speci?ed. 21. trademarks notice all referenced brands, product names, service names and trademarks are the property of their respective owners. i 2 c-bus logo is a trademark of koninklijke philips electronics n.v. 22. contact information for additional information, please visit: http://www.semiconductors.philips.com for sales of?ce addresses, send an email to: sales.addresses@www.semiconductors.philips.com level data sheet status [1] product status [2] [3] de?nition i objective data development this data sheet contains data from the objective speci?cation for product development. philips semiconductors reserves the right to change the speci?cation in any manner without notice. ii preliminary data quali?cation this data sheet contains data from the preliminary speci?cation. supplementary data will be published at a later date. philips semiconductors reserves the right to change the speci?cation without notice, in order to improve the design and supply the best possible product. iii product data production this data sheet contains data from the product speci?cation. philips semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. relevant changes will be communicated via a customer product/process change noti?cation (cpcn).
? koninklijke philips electronics n.v. 2006 all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. date of release: 9 march 2006 document number: pca9552_5 published in the netherlands philips semiconductors pca9552 16-bit i 2 c-bus led driver with programmable blink rates 23. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 ordering information . . . . . . . . . . . . . . . . . . . . . 2 4 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 5.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 functional description . . . . . . . . . . . . . . . . . . . 5 6.1 device address . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.2 control register . . . . . . . . . . . . . . . . . . . . . . . . 5 6.2.1 control register de?nition . . . . . . . . . . . . . . . . 6 6.3 register descriptions . . . . . . . . . . . . . . . . . . . . 6 6.3.1 input0 - input register 0 . . . . . . . . . . . . . . . . . 6 6.3.2 input1 - input register 1 . . . . . . . . . . . . . . . . . 6 6.3.3 pcs0 - frequency prescaler 0 . . . . . . . . . . . . . 7 6.3.4 pwm0 - pulse width modulation 0 . . . . . . . . . . 7 6.3.5 pcs1 - frequency prescaler 1 . . . . . . . . . . . . . 7 6.3.6 pwm1 - pulse width modulation 1 . . . . . . . . . . 7 6.3.7 ls0 to ls3 - led selector registers . . . . . . . . . 8 6.4 pins used as gpios . . . . . . . . . . . . . . . . . . . . . 9 6.5 power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.6 external reset . . . . . . . . . . . . . . . . . . . . . . . . 9 7 characteristics of the i 2 c-bus. . . . . . . . . . . . . 10 7.1 bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7.1.1 start and stop conditions . . . . . . . . . . . . . 10 7.2 system con?guration . . . . . . . . . . . . . . . . . . . 10 7.3 acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.4 bus transactions . . . . . . . . . . . . . . . . . . . . . . . 12 8 application design-in information . . . . . . . . . 13 8.1 minimizing i dd when the i/o is used to control leds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8.2 programming example . . . . . . . . . . . . . . . . . . 14 9 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 15 10 static characteristics. . . . . . . . . . . . . . . . . . . . 15 11 dynamic characteristics . . . . . . . . . . . . . . . . . 17 12 test information . . . . . . . . . . . . . . . . . . . . . . . . 19 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 20 14 handling information. . . . . . . . . . . . . . . . . . . . 23 15 soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 15.1 introduction to soldering surface mount packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 15.2 re?ow soldering . . . . . . . . . . . . . . . . . . . . . . . 23 15.3 wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 23 15.4 manual soldering . . . . . . . . . . . . . . . . . . . . . . 24 15.5 package related soldering information . . . . . . 24 16 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 25 17 revision history . . . . . . . . . . . . . . . . . . . . . . . 26 18 data sheet status. . . . . . . . . . . . . . . . . . . . . . . 27 19 de?nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 20 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 21 trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 22 contact information . . . . . . . . . . . . . . . . . . . . 27

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