TCA9534_16 Datasheet, PDF (1/38 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBUS Low-Power I/O Expander with Interrupt Output and Configuration Registers

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TCA9534
SCPS197B – SEPTEMBER 2014 – REVISED NOVEMBER 2016
TCA9534 Low Voltage 8-Bit I²C and SMBUS Low-Power I/O Expander with Interrupt
Output and Configuration Registers
1 Features
•1 Low Standby Current Consumption
• I²C 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
• 400-kHz Fast I²C Bus
• Three Hardware Address Pins Allow up to Eight
Devices on the I²C/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
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
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 I²C bus (or
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 I²C bus. The
device can also be reset to its default sate by cycling
the power supply and causing a power-on reset.
PART NUMBER
TCA9534
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
TSSOP (16)
5.00 mm × 4.40 mm
SOIC (16)
10.30 mm x 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
2 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics (for example: Gaming
Consoles)
• Industrial Automation
• Products With GPIO-Limited Processors
Simplified Schematic
I2C or SMBus
Master
(e.g. Processor)
VCC
SDA
SCL
INT
P0
P1
P2
TCA9534
P3
P4
A0
P5
P6
A1
P7
A2
GND
Peripheral
Devices
• RESET,
ENABLE, or
control
inputs
• INT or
status
outputs
• LEDs
Copyright © 2016, Texas Instruments Incorporated
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.