Philips Semiconductors

Product data sheet

PCA9537

with interrupt and reset

2

2004 Nov 29

FEATURES

200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

exceeds 100 mA

DESCRIPTION

The PCA9537 is a 10-pin CMOS device that provide 4 bits of

General Purpose parallel Input/Output (GPIO) expansion with

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

master.

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

device.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

DRAWING NUMBER

10-Pin Plastic TSSOP

–40

°C to +85 °C

PCA9537DP

9537

SOT552-1

Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging.