PCA9552BS

INTEGRATED CIRCUITS PCA9552 16-bit I2C LED driver with programmable blink rates Product data sheet Supersedes data of 2003 May 02 2004 Oct 01 Philips Semiconductors Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 DESCRIPTION The PCA9552 LED Blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I2C Master’s (MCU, MPU, DSP, chipset, 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 traffic on the I2C-bus and uses up one of the master’s timers. The PCA9552 LED Blinker instead requires only the initial set up command to program BLINK RATE 1 and BLINK RATE 2 (i.e., 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. FEATURES • 16 LED drivers (on, off, flashing at a programmable rate) • 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.172 Hz and 44 Hz (5.82 and 0.023 seconds) • Input/outputs not used as LED drivers can be used as regular GPIOs • Internal oscillator requires no external components • I2C-bus interface logic compatible with SMBus • Internal power-on reset • Noise filter on SCL/SDA inputs • Active-LOW reset input • 16 open drain outputs directly drive LEDs to 25 mA • Edge rate control on outputs • No glitch on power-up • Supports hot insertion • Low stand-by current • Operating power supply voltage range of 2.3 V to 5.5 V • 0 to 400 kHz clock frequency • ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101 • Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA • Packages offered: SO24, TSSOP24, HVQFN24 ORDERING INFORMATION PACKAGES 24-pin plastic SO 24-pin plastic TSSOP 24-pin plastic HVQFN TEMPERATURE RANGE –40 °C to +85 °C –40 °C to +85 °C –40 °C to +85 °C ORDER CODE PCA9552D PCA9552PW PCA9552BS TOPSIDE MARK PCA9552D PCA9552PW 9552 DRAWING NUMBER SOT137-1 SOT355-1 SOT616-1 Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging. I2C is a trademark of Philips Semiconductors Corporation. 2004 Oct 01 2 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 PIN CONFIGURATION — SO, TSSOP A0 1 A1 A2 LED0 LED1 LED2 LED3 LED4 LED5 2 3 4 5 6 7 8 9 24 VDD 23 SDA 22 SCL 21 RESET 20 LED15 19 LED14 18 LED13 17 LED12 16 LED11 15 LED10 14 LED9 13 LED8 PIN CONFIGURATION — HVQFN 21 VDD 20 SDA 19 SCL 18 RESET 17 LED15 16 LED14 15 LED13 14 LED12 13 LED11 LED10 12 LED8 10 LED9 11 7 8 LED7 9 VSS 24 A2 23 A1 22 A0 LED0 1 LED1 2 LED2 3 LED3 4 LED4 5 LED5 6 LED7 11 VSS 12 LED6 LED6 10 TOP VIEW su01668 SW00931 Figure 1. Pin configuration — SO, TSSOP Figure 2. Pin configuration — HVQFN PIN DESCRIPTION SO, TSSOP PIN NUMBER 1 2 3 4, 5, 6, 7, 8, 9, 10, 11 12 13, 14, 15, 16, 17, 18, 19, 20 21 22 23 24 HVQFN PIN NUMBER 22 23 24 1, 2, 3, 4, 5, 6, 7, 8 9 10, 11, 12, 13, 14, 15, 16, 17 18 19 20 21 SYMBOL A0 A1 A2 LED0–7 VSS LED8–15 RESET SCL SDA VDD Address input 0 Address input 1 Address input 2 LED driver 0–7 Supply ground LED driver 8–15 Active-LOW reset input Serial clock line Serial data line Supply voltage FUNCTION 2004 Oct 01 3 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 BLOCK DIAGRAM A2 A1 A0 PCA9552 INPUT REGISTER SCL INPUT FILTERS SDA I2C-BUS CONTROL LED SELECT (LSx) REGISTER 0 1 LEDx VDD RESET POWER-ON RESET PRESCALER 0 REGISTER PRESCALER 1 REGISTER PWM0 REGISTER PWM1 REGISTER BLINK0 OSCILLATOR BLINK1 VSS NOTE: ONLY ONE I/O SHOWN FOR CLARITY SW00787 Figure 3. Block diagram 2004 Oct 01 4 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 DEVICE ADDRESSING 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 4. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW. SLAVE ADDRESS Control Register definition B3 0 0 A0 R/W B2 0 0 0 0 1 1 1 1 0 0 B1 0 0 1 1 0 0 1 1 0 0 B0 0 1 0 1 0 1 0 1 0 1 REGISTER NAME INPUT0 INPUT1 PSC0 PWM0 PSC1 PWM1 LS0 LS1 LS2 LS3 TYPE READ READ READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE READ/ WRITE REGISTER FUNCTION INPUT REGISTER 0 INPUT REGISTER 1 FREQUENCY PRESCALER 0 PWM REGISTER 0 FREQUENCY PRESCALER 1 PWM REGISTER 1 LED 0–3 SELECTOR LED 4–7 SELECTOR LED 8–11 SELECTOR LED 12–15 SELECTOR 1 1 0 0 A2 A1 0 0 su01420 FIXED HARDWARE SELECTABLE Figure 4. Slave address The last bit of the address byte defines the operation to be performed. When set to logic 1 a read is selected, while a logic 0 selects a write operation. 0 0 0 0 1 1 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 I2C-bus. 0 0 0 AI B3 B2 B1 B0 REGISTER DESCRIPTION REGISTER ADDRESS RESET STATE: 00h AUTO-INCREMENT FLAG INPUT0 — INPUT REGISTER 0 SW00898 LED 7 bit default 7 X LED 6 6 X LED 5 5 X LED 4 4 X LED 3 3 X LED 2 2 X LED 1 1 X LED 0 0 X Figure 5. Control register The lowest 3 bits are used as a pointer to determine which register will be accessed. If the auto-increment flag (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 auto-increment flag 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 0 0 0 0 0). Only the 4 least significant bits are affected by the AI flag. Unused bits must be programmed with zeroes. The INPUT register 0 reflects the state of the device pins (inputs 0 to 7). Writes to this register will be acknowledged but will have no effect. NOTE: The default value “X” is determined by the externally applied logic level, normally ‘1’ when used for directly driving LED with pull-up to VDD. INPUT1 — INPUT REGISTER 1 LED 15 bit default 7 X LED 14 6 X LED 13 5 X LED 12 4 X LED 11 3 X LED 10 2 X LED 9 1 X LED 8 0 X The INPUT register 1 reflects the state of the device pins (inputs 8 to 15). Writes to this register will be acknowledged but will have no effect. NOTE: The default value “X” is determined by the externally applied logic level, normally ‘1’ when used for directly driving LED with pull-up to VDD. PSC0 — FREQUENCY PRESCALER 0 bit default 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 1 PSC0 is used to program the period of the PWM output. The period of BLINK0 + (PSC0 ) 1) 44 2004 Oct 01 5 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 PWM0 — PWM REGISTER 0 bit default 7 1 6 0 5 0 4 0 3 0 2 0 1 0 0 0 PINS USED AS GENERAL PURPOSE I/Os LED pins not used to control LEDs can be used as general purpose I/Os. For use as input: Set LEDx 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. 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 is: 256 – PWM0 256 PSC1 — FREQUENCY PRESCALER 1 bit default 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0 1 PSC1 is used to program the period of PWM output. (PSC1 ) 1) The period of BLINK1 + 44 PWM1 — PWM REGISTER 1 bit default 7 1 6 0 5 0 4 0 3 0 2 0 1 0 0 0 POWER-ON RESET When power is applied to VDD, an internal Power-On Reset holds the PCA9552 in a reset condition until VDD has reached VPOR. At this point, the reset condition is released and the PCA9552 registers are initialized to their default states, all the outputs in the off state. Thereafter, VDD must be lowered below 0.2 V to reset the device. 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 is: 256 – PWM1 256 LS0 — LED 0–3 SELECTOR LED 3 bit default 7 0 6 1 LED 2 5 0 4 1 LED 1 3 0 2 1 LED 0 1 0 0 1 EXTERNAL RESET A reset can be accomplished by holding the RESET pin LOW for a minimum of tW. The PCA9552 registers and I2C state machine will be held in their default state until the RESET input is once again HIGH. This input requires a pull-up resistor to VDD if no active connection is used. LS1 — LED 4–7 SELECTOR LED 7 bit default 7 0 6 1 LED 6 5 0 4 1 LED 5 3 0 2 1 LED 4 1 0 0 1 LS2 — LED 8–11 SELECTOR LED 11 bit default 7 0 6 1 LED 10 5 0 4 1 LED 9 3 0 2 1 LED 8 1 0 0 1 LS3 — LED 12–15 SELECTOR LED 15 bit default 7 0 6 1 LED 14 5 0 4 1 LED 13 3 0 2 1 LED 12 1 0 0 1 The LSx LED select registers determine the source of the LED data. 00 = Output is set LOW (LED on) 01 = Output is set Hi-Z (LED off – default) 10 = Output blinks at PWM0 rate 11 = Output blinks at PWM1 rate 2004 Oct 01 6 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 CHARACTERISTICS OF THE I2C-BUS The I2C-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. 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 defined as the start condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the stop condition (P) (see Figure 7). 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 6). System configuration 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 8). SDA SCL data line stable; data valid change of data allowed SW00363 Figure 6. Bit transfer SDA SDA SCL S START condition P STOP condition SCL SW00365 Figure 7. Definition of start and stop conditions SDA SCL MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER I2C MULTIPLEXER SLAVE SW00366 Figure 8. System configuration 2004 Oct 01 7 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 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. DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER acknowledge SCL FROM MASTER S START condition 1 2 8 9 clock pulse for acknowledgement SW00368 Figure 9. Acknowledgement on the I2C-bus 2004 Oct 01 8 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 Bus transactions SCL 1 2 3 4 5 6 7 8 9 command byte data to register slave address SDA S 1 1 0 0 A2 A1 A0 0 R/W A 0 0 0 AI B3 B2 B1 B0 A acknowledge from slave DATA 1 A acknowledge from slave start condition acknowledge from slave WRITE TO REGISTER DATA OUT FROM PORT tpv DATA 1 VALID SW02000 Figure 10. WRITE to register slave address acknowledge from slave acknowledge from slave slave address acknowledge from slave data from register acknowledge from master S 1 1 0 0 A2 A1 A0 0 R/W A 0 0 0 AI B3 B2 B1 B0 A S 1 1 0 0 A2 A1 A0 1 R/W A DATA first byte A at this moment master-transmitter becomes master-receiver and slave-receiver becomes slave-transmitter data from register auto-increment register address if AI = 1 no acknowledge from master DATA last byte NA P SW01099 Figure 11. READ from register slave address data from port data from port SDA S 1 1 0 0 A2 A1 A0 1 R/W A acknowledge from slave DATA 1 A acknowledge from master DATA 4 NA P stop condition start condition no acknowledge from master READ FROM PORT DATA INTO PORT DATA 1 tph DATA 2 DATA 3 tps DATA 4 SW01096 NOTE: 1. This figure assumes the command byte has previously been programmed with 00h. Figure 12. READ input port register 2004 Oct 01 9 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 APPLICATION DATA 5V 5V 10 kΩ (3×) VDD SDA SCL SDA SCL RESET LED0 LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 I2C/SMBus MASTER A2 A1 A0 VSS LED9 LED10 LED11 LED12 LED13 LED14 LED15 Note: LED0 to LED12 are used as LED drivers LED13 to LED15 are used as regular GPIOs. GPIOs PCA9552 SW00930 Figure 13. Typical application Minimizing IDD when the I/O is used to control LEDs When the I/Os are used to control LEDs, they are normally connected to VDD through a resistor as shown in Figure 13. Since the LED acts as a diode, when the LED is off the I/O VIN is about 1.2 V less than VDD. The supply current, IDD, increases as VIN becomes lower than VDD and is specified as ∆IDD in the DC characteristics table. Designs needing to minimize current consumption, such as battery power applications, should consider maintaining the I/O pins greater than or equal to VDD when the LED is off. Figure 14 shows a high value resistor in parallel with the LED. Figure 15 shows VDD less than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O VIN at or above VDD and prevents additional supply current consumption when the LED is off. VDD 3.3 V 5V LED VDD 100 kΩ VDD LED LEDx LEDx SW02086 SW02087 Figure 14. High value resistor in parallel with the LED Figure 15. Device supplied by a lower voltage 2004 Oct 01 10 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 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. Table 1. I2C-bus Start PCA9552 address with A0–A2 = low PSC0 subaddress + auto-increment Set prescaler PSC0 to achieve a period of 1 second: Blink period + 1 + PSC0 ) 1 44 PSC0 = 43 Set PWM0 duty cycle to 50%: 256 – PWM0 + 0.5 256 PWM0 = 128 Set prescaler PCS1 to achieve a period of 0.25 seconds: Blink period + 0.25 + PSC1 ) 1 44 PSC1 = 10 Set PWM1 output duty cycle to 25%: 256 – PWM1 + 0.25 256 PWM1 = 192 Set LED0 to LED3 on Set LED4 and 5 to PWM0, and LED6 or 7 to PWM1 Set LED8 to LED11 off Set LED12 to LED15 off Stop 00h FAh 55h 55h P 0Ah S C0h 12h 2Bh 80h C0h 2004 Oct 01 11 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 ABSOLUTE MAXIMUM RATINGS In accordance with the Absolute Maximum Rating System (IEC 134) SYMBOL VDD VI/O II/O ISS Ptot Tstg Tamb Supply voltage DC voltage on an I/O DC output current on an I/O Supply current Total power dissipation Storage temperature range Operating ambient temperature PARAMETER CONDITIONS MIN –0.5 VSS – 0.5 — — — –65 –40 MAX 6.0 5.5 ±25 200 400 +150 +85 UNIT V V mA mA mW °C °C HANDLING Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is desirable to take precautions appropriate to handling MOS devices. Advice can be found in Data Handbook IC24 under ”Handling MOS devices”. DC CHARACTERISTICS SYMBOL Supplies VDD IDD Istb ∆IDD VPOR VIL VIH IOL IL CI I/Os VIL VIH Supply voltage Supply current Standby current VDD = 2.3 V to 5.5 V; VSS = 0 V; Tamb = –40 °C to +85 °C; unless otherwise specified. TYP at 3.3 V and 25 °C. PARAMETER CONDITIONS MIN 2.3 Operating mode; VDD = 5.5 V; no load; VI = VDD or VSS; fSCL = 100 kHz Standby mode; VDD = 5.5 V; no load; VI = VDD or VSS; fSCL = 0 kHz Standby mode; VDD = 5.5 V; Every LED I/O at VIN = 4.3 V; fSCL = 0 kHz VDD = 3.3 V; no load; VI = VDD or VSS — — — — –0.5 0.7 VDD VOL = 0.4 V VI = VDD = VSS VI = VSS 3 –1 — –0.5 2.0 VOL = 0.4 V; VDD = 2.3 V; Note 2 VOL = 0.4 V; VDD = 3.0 V; Note 2 IO OL LOW-level output current level output current VOL = 0.4 V; VDD = 5.0 V; Note 2 VOL = 0.7 V; VDD = 2.3 V; Note 2 VOL = 0.7 V; VDD = 3.0 V; Note 2 VOL = 0.7 V; VDD = 5.0 V; Note 2 IL CIO VIL VIH ILI CI Input leakage current Input/output capacitance LOW-level input voltage HIGH-level input voltage Input leakage current Input capacitance VI = VSS VDD = 3.6 V; VI = 0 V or VDD 9 12 15 15 20 25 –1 — –0.5 2.0 –1 — TYP — 350 2.1 — 1.7 — — 6.5 — 4.4 — — — — — — — — — 2.6 — — — 2.3 MAX 5.5 550 5.0 2 2.2 0.3 VDD 5.5 — +1 5 0.8 5.5 — — — — — — 1 5 0.8 5.5 1 5 UNIT V µA µA mA V V V mA µA pF V V mA mA mA mA mA mA µA pF V V µA pF Additional standby current Power-on reset voltage (Note 1) LOW-level input voltage HIGH-level input voltage LOW-level output current Leakage current Input capacitance LOW-level input voltage HIGH-level input voltage Input SCL; input/output SDA Select Inputs A0, A1, A2 / RESET NOTES: 1. VDD must be lowered to 0.2 V in order to reset part. 2. Each I/O must be externally limited to a maximum of 25 mA and each octal (LED0–LED7 and LED8–LED15) must be limited to a maximum current of 100 mA for a device total of 200 mA. 2004 Oct 01 12 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 AC SPECIFICATIONS SYMBOL fSCL tBUF tHD;STA tSU;STA tSU;STO tHD;DAT tVD;ACK tVD;DAT (L) tVD;DAT (H) tSU;DAT tLOW tHIGH tF tR tSP Port Timing tPV tPS tPH Reset tW tREC tRESET4,5 Reset pulse width Reset recovery time Time to reset 10 0 400 — — — 10 0 400 — — — ns ns ns Output data valid Input data setup time Input data hold time — 100 1 200 — — — 100 1 200 — — ns ns µs PARAMETER Operating frequency Bus free time between STOP and START conditions Hold time after (repeated) START condition Repeated START condition set-up time Set-up time for STOP condition Data in hold time Valid time for ACK condition2 Data out valid time3 Data out valid time3 Data set-up time Clock LOW period Clock HIGH period Clock/Data fall time Clock/Data rise time Pulse width of spikes that must be suppressed by the input filters STANDARD MODE I2C-BUS MIN 0 4.7 4.0 4.7 4.0 0 — — — 250 4.7 4.0 — — — MAX 100 — — — — — 600 600 1500 — — — 300 1000 50 FAST MODE I2C-BUS MIN 0 1.3 0.6 0.6 0.6 0 — — — 100 1.3 0.6 20 + 0.1 Cb — 1 UNITS kHz µs µs µs µs ns ns ns ns ns µs µs ns ns ns MAX 400 — — — — — 600 600 600 — — — 300 300 50 20 + 0.1 Cb1 NOTES: 1. Cb = total capacitance of one bus line in pF. 2. tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW. 3. tVD;DAT = minimum time for SDA data out to be valid following SCL LOW. 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 tRESET and the RC time constant of the SDA bus. 2004 Oct 01 13 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 +20% MAX +10% 0% PERCENT VARIATION AVG –10% –20% –30% MIN –40% –40 0 +25 TEMPERATURE (°C) +70 +85 SW02311 Figure 16. Typical frequency variation over process at VDD = 2.3 V to 3.0 V +20% MAX +10% 0% PERCENT VARIATION AVG –10% –20% MIN –30% –40% –40 0 +25 TEMPERATURE (°C) +70 +85 SW02312 Figure 17. Typical frequency variation over process at VDD = 3.0 V to 5.5 V 2004 Oct 01 14 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 SCL START ACK OR READ CYCLE SDA 30% tRESET RESET 50% tREC tW tRESET LEDx 50% 50% 50% LED OFF SW02310 Figure 18. Definition of RESET timing SDA tBUF tLOW tR tF tHD;STA tSP SCL tHD;STA P S tHD;DAT tHIGH tSU;DAT Sr tSU;STA tSU;STO P SU00645 Figure 19. Definition of timing PROTOCOL START CONDITION (S) t t BIT 7 MSB (A7) t HIGH BIT 6 (A6) BIT 7 (D1) BIT 8 (D0) ACKNOWLEDGE (A) STOP CONDITION (P) SU;STA LOW 1 / f SCL SCL t BUF tr t f SDA t HD;STA t SU;DAT t HD;DAT t VD;DAT t VD;ACK t SU;STO SW02333 Figure 20. I2C-bus timing diagram; rise and fall times refer to VIL and VIH 15 2004 Oct 01 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 VDD RL = 500 Ω VI PULSE GENERATOR RT D.U.T. CL 50 pF VO VDD Open DEFINITIONS RL = Load resistor FOR LEDN. RL FOR SDA AND SCL > 1 kΩ (3 mA or less current). CL = Load capacitance includes jig and probe capacitance RT = Termination resistance should be equal to the output impedance ZO of the pulse generators. Figure 21. Test circuitry for switching times SW02334 2004 Oct 01 16 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 SO24: plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 2004 Oct 01 17 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1 2004 Oct 01 18 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 HVQFN24: plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm SOT616-1 2004 Oct 01 19 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 REVISION HISTORY Rev _4 Date 20041001 Description Product data sheet (9397 750 13727). Supersedes data of 2003 May 02 (9397 750 11463). Modifications: • “Features” section on page 2: – second bullet: change from “... between 0.15625 and 40 Hz (6.4 and 0.025 seconds)” to “... between 0.172 Hz and 44 Hz (5.82 and 0.023 seconds)” • Section “Register Description” on page 5: – “INPUT0 — INPUT REGISTER 1” changed to “INPUT0 — INPUT REGISTER 0”. (Also changed first sentence following table from “The INPUT register 1 reflects ... ” to “The INPUT register 0 reflects ...”. – “INPUT0 — INPUT REGISTER 0” table modified; note added – “INPUT1 — INPUT REGISTER 2” changed to “INPUT1 — INPUT REGISTER 1”. – “INPUT1 — INPUT REGISTER 1” table modified; note added – section “PCS0—Frequency Prescaler 0”: change denominator in equation from 38 to 44. – section “PCS1—Frequency Prescaler 1”: change denominator in equation from 38 to 44. • Add section “Pins used as General Purpose I/Os” on page 6. • Section “Power-on Reset” on page 6 re-written. • Section “External Reset” on page 6: second paragraph changed from “This input requires a pull-up resistor to • Figure 13 on page 10: add resistor values • Table 1 on page 11: VDD.” to “This input requires a pull-up resistor to VDD if no active connection is used.”. – step “Set prescaler PSC0 ...”: change equation denominator from 38 to 44; change ‘PSC0 = 37’ to ‘PSC0 = 43’; change I2C-bus address from ‘25h’ to ‘2Bh’ – step “Set prescaler PCS1 ...”: change equation denominator from 38 to 44; change ‘PSC1 = 9’ to ‘PCS1 = 10’; change I2C-bus address from ‘09h’ to ‘0Ah’ • DC Characteristics table on page 12: add (new) Note 1 and its reference at VPOR. • Add Figures 20 and 21. _3 _2 _1 20030502 20030224 20020927 Product data (9397 750 11463); ECN 853-2374 29857 of 24 April 2003; supersedes data of 24 February 2003 (9397 750 11156). Product data (9397 750 11156); ECN 853-2374 29331 of 20 December 2002; supersedes data of 2002 Sep 09 (9397 750 10329). Product data (9397 750 10329); ECN 853-2374 28878 of 09 September 2002. 2004 Oct 01 20 Philips Semiconductors Product data sheet 16-bit I2C LED driver with programmable blink rates PCA9552 Purchase of Philips I2C components conveys a license under the Philips’ I2C patent to use the components in the I2C system provided the system conforms to the I2C specifications defined by Philips. This specification can be ordered using the code 9398 393 40011. Data sheet status Level I Data sheet status [1] Objective data sheet Product status [2] [3] Development Definitions This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. 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 Notification (CPCN). II Preliminary data sheet Qualification III Product data sheet Production [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 latest 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. Definitions Short-form specification — The data in a short-form specification 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 definition — 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 specification 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 specified use without further testing or modification. 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 Notification (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 specified. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 © Koninklijke Philips Electronics N.V. 2004 All rights reserved. Printed in U.S.A. Date of release: 10-04 For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. Document order number: 9397 750 13727 Philips Semiconductors 2004 Oct 01 21