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PCA9534 Datasheet(PDF) 2 Page - NXP Semiconductors |
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PCA9534 Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 17 page Philips Semiconductors Product data sheet PCA9534 8-bit I2C and SMBus low power I/O port with interrupt 2 2004 Sep 30 FEATURES • 8-bit I2C GPIO • Operating power supply voltage range of 2.3 V to 5.5 V • 5 V tolerant I/Os • Polarity inversion register • Active low interrupt output • Low stand-by current • Noise filter on SCL/SDA inputs • No glitch on power-up • Internal power-on reset • 8 I/O pins which default to 8 inputs • 0 kHz to 400 kHz clock frequency • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 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 • Offered in three different packages: SO16, TSSOP16, and HVQFN16 DESCRIPTION The PCA9534 is a16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C/SMBus applications and was developed to enhance the Philips family of I2C I/O expanders. The improvements include higher drive capability, 5V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, pushbuttons, LEDs, fans, etc. The PCA9534 consist of an 8-bit Configuration register (Input or Output selection); 8-bit Input register, 8-bit Output register and an 8-bit Polarity inversion register (Active HIGH or Active LOW operation). The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each Input or Output is kept in the corresponding Input or Output register. The polarity of the input port register can be inverted with the Polarity Inversion Register. All registers can be read by the system master. Although pin-to-pin and I2C address compatible with the PCF8574 series, software changes are required due to the enhancements and are discussed in Application Note AN469. The PCA9534 is identical to the PCA9554 except for the removal of the internal I/O pull-up resistor which greatly reduces power consumption when the I/Os are held LOW. The PCA9534 open-drain interrupt output is activated when any input state differs from its corresponding input port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine. Three hardware pins (A0, A1, A2) vary the fixed I2C address and allow up to eight devices to share the same I2C/SMBus. ORDERING INFORMATION PACKAGES TEMPERATURE RANGE ORDER CODE TOPSIDE MARK DRAWING NUMBER 16-Pin Plastic SO (wide) –40 °C to +85 °C PCA9534D PCA9534D SOT162-1 16-Pin Plastic TSSOP –40 °C to +85 °C PCA9534PW PCA9534 SOT403-1 16-Pin Plastic HVQFN –40 °C to +85 °C PCA9534BS 9534 SOT629-1 Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging. I2C is a trademark of Philips Semiconductors Corporation. SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I2C patent. |
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