TCA9554_15 Datasheet, PDF (1/38 Pages) Texas Instruments – TCA9554 Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output and Configuration Registers

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TCA9554
SCPS233D – MARCH 2012 – REVISED AUGUST 2015
TCA9554 Low Voltage 8-Bit I²C and SMBus Low-Power I/O Expander With Interrupt Output
and Configuration Registers
1 Features
•1 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/Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset
• Low Standby Current Consumption
• 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 TCA9554 is a 16-pin device that provides 8 bits
of general purpose parallel input/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.
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA9554 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 TCA9554 include an interrupt that
is generated on the INT pin whenever an input port
changes state. The A0, A1, and A2 hardware
selectable address pins allow up to eight TCA9554
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TSSOP (16)
5.00 mm × 4.40 mm
TCA9554
SSOP (16)
4.90 mm × 3.90 mm
SSOP (16)
6.20 mm × 5.30 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 (e.g. Gaming Consoles)
• Industrial Automation
• Products With GPIO-Limited Processors
Simplified Block Diagram
I2C or SMBus
Master
(e.g. Processor)
VCC
SDA
SCL
INT
P0
P1
P2
TCA9554
P3
P4
A0
P5
P6
A1
P7
A2
GND
Peripheral
Devices
• RESET,
ENABLE, or
control
inputs
• INT or
status
outputs
• LEDs
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.