TCA9538

Peripheral

Devices

I2C or SMBus

Master

(e.g. Processor)

SDA

SCL

INT

P0

P1

RESET

P2

P3

P4

P5

P6

P7

VCC

A1

GND

A0

•

,

ENABLE, or

control

inputs

•

or

status

outputs

• LEDs

RESET

INT

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TCA9538

SCPS199C – AUGUST 2014 – REVISED OCTOBER 2015

Output, Reset, and Configuration Registers

1 Features

2 Applications

1

•

Low Standby Current Consumption

•

Servers

•

•

Routers (Telecom Switching Equipment)

•

Open-Drain Active-Low Interrupt Output

•

Personal Computers

•

Active-Low Reset Input

•

Personal Electronics (e.g. Gaming Consoles)

•

Operating Power-Supply Voltage Range of 1.65 V

•

Industrial Automation

to 5.5 V

•

Products With GPIO-Limited Processors

•

5-V Tolerant I/O Ports

3 Description

•

The TCA9538 is a 16-pin device that provides 8 bits

•

Two Hardware Address Pins Allow up to Four

of

general

purpose

parallel

input/output

(I/O)

•

Input/Output Configuration Register

SMBus) protocol. The device can operate with a

•

Polarity Inversion Register

power supply voltage ranging from 1.65 V to 5.5 V.

The device supports both 100-kHz (Standard-mode)

•

Power-Up With All Channels Configured as Inputs

and 400-kHz (Fast-mode) clock frequencies. I/O

•

No Glitch on Power Up

expanders such as the TCA9538 provide a simple

•

Noise Filter on SCL/SDA Inputs

solution

when

additional

I/Os

are

needed

for

switches, sensors, push-buttons, LEDs, fans, etc.

•

Latched Outputs With High-Current Drive

Maximum Capability for Directly Driving LEDs

The features of the TCA9538 include an interrupt that

•

Latch-Up Performance Exceeds 100 mA Per

is generated on the INT pin whenever an input port

changes state. The A0 and A1 hardware selectable

JESD 78, Class II

address pins allow up to four TCA9538 devices on

•

ESD Protection Exceeds JESD 22

–

2000-V Human-Body Model (A114-A)

default sate by using the RESET feature or by cycling

–

1000-V Charged-Device Model (C101)

the power supply and causing a power-on reset.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TSSOP (16)

5.00 mm × 4.40 mm

TCA9538

SSOP (16)

6.20 mm × 5.30 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.