CAT9534 Datasheet, PDF(1/16 Page) ON Semiconductor – 8-bit I²C and SMBus I/O Port with Interrupt

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CAT9534 Datasheet, PDF (1/16 Pages) ON Semiconductor – 8-bit I²C and SMBus I/O Port with Interrupt

8-bit IÂ²C and SMBus I/O Port with Interrupt

CAT9534

FEATURES

ï® 400kHz IÂ²C bus compatible

ï® 2.3V to 5.5V operation

ï® Low stand-by current

ï® 5V tolerant I/Os

ï® 8 I/O pins that default to inputs at power-up

ï® High drive capability

ï® Individual I/O configuration

ï® Polarity inversion register

ï® Active low interrupt output

ï® Internal power-on reset

ï® No glitch on power-up

ï® Noise filter on SDA/SCL inputs

ï® Cascadable up to 8 devices

ï® Industrial temperature range

ï® RoHS-compliant 16-lead SOIC and TSSOP, and

16-pad TQFN (4 x 4mm) packages

APPLICATIONS

ï® White goods (dishwashers, washing machines)

ï® Handheld devices (cell phones, PDAs, digital

cameras)

ï® Data Communications (routers, hubs and

servers)

BLOCK DIAGRAM (1)

DESCRIPTION

The CAT9534 is an 8-bit parallel input/output port

expander for IÂ²C and SMBus compatible applications.

These I/O expanders provide a simple solution in

applications where additional I/Os are needed: sensors,

power switches, LEDs, pushbuttons, and fans.

The CAT9534 consists of an input port register, an

output port register, a configuration register, a polarity

inversion register and an IÂ²C/SMBus-compatible serial

interface.

Any of the eight I/Os can be configured as an input or

output by writing to the configuration register. The

system master can invert the CAT9534 input data by

writing to the active-high polarity inversion register.

The CAT9534 features an active low interrupt output

which indicates to the system master that an input

state has changed.

The deviceâs extended addressing capability allows up

to 8 devices to share the same bus.

CAT9534 is offered in 16 pin SOIC, TSSOP and

TQFN packages and operates over the full -40ÂºC to

+85ÂºC industrial temperature range.

For Ordering Information details, see page 15.

SCL

SDA

VCC

VSS

INPUT

FILTER

POWER-ON

RESET

I2C/SMBUS

CONTROL

8-BIT

WRITE pulse

READ pulse

INPUT/

OUTPUT

PORTS

LP FILTER

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

I/O6 VCC

I/O7

INT

Notes:

(1) All I/Os are set to inputs at RESET.

Characteristics subject to change without notice

Doc. No. MD-9004 Rev. D

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