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PCA9537 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. PCA9537
Description  4-bit I2C and SMBus low power I/O port with interrupt and reset
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9537 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product data sheet
4-bit I2C and SMBus low power I/O port
with interrupt and reset
2004 Nov 29
4-bit I2C GPIO with interrupt and reset
Operating power supply voltage range of 2.3 to 5.5 V
5 V tolerant I/Os
Polarity inversion register
Active LOW interrupt output
Active LOW reset input
Low stand-by current
Noise filter on SCL/SDA inputs
No glitch on power-up
Internal power-on reset
4 I/O pins which default to 4 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 JEDEC Standard JESD78 which
exceeds 100 mA
Offered in TSSOP10 package
The PCA9537 is a 10-pin CMOS device that provide 4 bits of
General Purpose parallel Input/Output (GPIO) expansion with
interrupt and reset for I2C/SMBus applications and was developed
to enhance the Philips family of I
@C I/O expanders. I/O expanders
provides a simple solution when additional I/O is needed for ACPI
power switches, sensors, pushbuttons, LEDs, fans, etc.
The PCA9537 consists of a 4-bit Configuration register (Input or
Output selection); 4-bit Input register, 4-bit Output register and a
4-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
The PCA9537 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. The RESET pin
causes the same reset/initialization to occur without depowering the
The I2C address is fixed and allows only one device on the same
10-Pin Plastic TSSOP
°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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