1.

General description

The PCA9536 is an 8-pin CMOS device that provides 4 bits of General Purpose parallel

provide a simple solution when additional I/O is needed for ACPI power switches,

sensors, push buttons, LEDs, fans, etc.

The PCA9536 consists of a 4-bit Configuration register (input or output selection), 4-bit

Input Port register, 4-bit Output Port 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 Port or Output Port register. The polarity of the read

register can be inverted with the Polarity Inversion register. All registers can be read by

the system master.

The power-on reset sets the registers to their default values and initializes the device state

machine.

2.

Features

Operating power supply voltage range of 2.3 V to 5.5 V

5 V tolerant I/Os

Polarity Inversion register

Low standby 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 with 100 k

Ω internal pull-up resistor

0 Hz 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

Packages offered: SO8, TSSOP8 (MSOP8), HVSON8

PCA9536

Rev. 05 — 25 January 2010

Product data sheet