Philips Semiconductors
Product data sheet
8-bit I2C and SMBus low power I/O port with interrupt
PCA9534
DESCRIPTION
The PCA9534 is a16-pin CMOS device that provide 8 bits of
General Purpose parallel Input/Output (GPIO) expansion for
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I C/SMBus applications and was developed to enhance the Philips
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family of I C 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
FEATURES
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• 8-bit I C 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
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master. Although pin-to-pin and I C 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.
• Internal power-on reset
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.
• 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
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• Latch-up testing is done to JESDEC Standard JESD78 which
Three hardware pins (A0, A1, A2) vary the fixed I C address and
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exceeds 100 mA
allow up to eight devices to share the same I C/SMBus.
• Offered in three different packages: SO16, TSSOP16, and
HVQFN16
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
–40 °C to +85 °C
ORDER CODE
PCA9534D
TOPSIDE MARK
PCA9534D
PCA9534
DRAWING NUMBER
SOT162-1
16-Pin Plastic SO (wide)
16-Pin Plastic TSSOP
16-Pin Plastic HVQFN
–40 °C to +85 °C
PCA9534PW
PCA9534BS
SOT403-1
–40 °C to +85 °C
9534
SOT629-1
Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging.
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I C is a trademark of Philips Semiconductors Corporation.
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I C patent.
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2004 Sep 30