Texas Instruments TCA9534 Manual

TCA9534 Low Voltage 8-Bit I

1 Features

• ESD Protection Exceeds JESD 22
1
– 2000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
• Low Standby Current Consumption
2
• I C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• Operating Power-Supply Voltage Range of 1.65 V
to 5.5 V
• 5-V Tolerant I/O Ports
2
• 400-kHz Fast I C Bus
• Three Hardware Address Pins Allow up to Eight
2
Devices on the I C/SMBus
• Input and Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset
• Power-Up With All Channels Configured as Inputs
• No Glitch on Power Up
• Noise Filter on SCL/SDA Inputs
• Latched Outputs With High-Current Drive
Maximum Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II

2 Applications

• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics (for example: Gaming
Consoles)
• Industrial Automation
• Products With GPIO-Limited Processors
I2C or SMBus
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.
Order
Product
Folder Now
2
C and SMBUS Low-Power I/O Expander with Interrupt
Output and Configuration Registers
Simplified Schematic
SDA
SCL
INT
Master
(e.g. Processor)
A0
A1
A2
GND
Tools &
Technical
Software
Documents
SCPS197D – SEPTEMBER 2014 – REVISED OCTOBER 2017

3 Description

The TCA9534 is a 16-pin device that provides 8 bits
of general purpose parallel input and output (I/O)
expansion for the two-line bidirectional I
SMBus) protocol. The device can operate with a
power supply voltage ranging from 1.65 V to 5.5 V,
which allows for use with a wide range of devices.
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA9534 provide a simple
solution when additional I/Os are needed for
switches, sensors, push-buttons, LEDs, fans, and
other similar devices.
The features of the TCA9534 include an interrupt that
is generated on the INT pin. This allows the master to
know when an input port changes state. The A0, A1,
and A2 hardware selectable address pins allow up to
eight TCA9534 devices on the same I
device can also be reset to its default sate by cycling
the power supply and causing a power-on reset.
Device Information
PART NUMBER
TSSOP (16)
TCA9534
SOIC (16)
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
VCC
P0
P1
P2
P3
TCA9534
P4
P5
P6
P7
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2
C bus (or
2
C bus. The
(1)
PACKAGE BODY SIZE (NOM)
5.00 mm × 4.40 mm
10.30 mm x 7.50 mm
Peripheral
Devices
• RESET ,
ENABLE, or
control
inputs
• INT or
status
outputs
• LEDs
TCA9534