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PCA9534 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. PCA9534
Description  8-bit I2C and SMBus, low power I/O port with interrupt
Download  17 Pages
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9534 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product data sheet
8-bit I2C and SMBus low power I/O port with interrupt
2004 Sep 30
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
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.
16-Pin Plastic SO (wide)
°C to +85 °C
16-Pin Plastic TSSOP
°C to +85 °C
16-Pin Plastic HVQFN
°C to +85 °C
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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