TCA6408A-Q1 Datasheet, PDF (1/40 Pages) Texas Instruments – Low-Voltage 8-Bit I2C and SMBus I/O Expander With Interrupt Output

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TCA6408A-Q1
SCPS234 – SEPTEMBER 2016
TCA6408A-Q1 Low-Voltage 8-Bit I²C and SMBus I/O Expander With Interrupt Output
1 Features
•1 I²C to Parallel Port Expander
• Operating Power-Supply Voltage Range of 1.65 V
to 3.6 V
• Allows Bidirectional Voltage-Level Translation and
GPIO Expansion Between 1.8-, 2.5-, and 3.3-V
I²C Bus and P-Ports
• Low Standby Current Consumption
• 400-kHz Fast I²C Bus
• Hardware Address Pin Allows Two TCA6408A-Q1
Devices on the Same I²C/SMBus Bus
• Active-Low Reset (RESET) Input
• Open-Drain Active-Low Interrupt (INT) Output
• 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 meets 100 mA Per AEC
Q100-004
• Schmitt-Trigger Action Allows Slow Input
Transition and Better Switching Noise Immunity at
the SCL and SDA Inputs
• ESD Protection
– 2000-V Human Body Model (Q100-002)
– 1000-V Charged-Device Model (Q100-011)
2 Applications
• Automotive Infotainment
• Advanced Drive Assistance Systems (ADAS)
• Automotive Body Electronics
• HEV, EV, and Power train
• Industrial, Factory, and Building Automation
• Test & Measurement
• EPOS
3 Description
The TCA6408A-Q1 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. This device can operate with a
power supply voltage ranging from 1.65 V to 3.6 V on
both the I²C bus side (V_CCI) and on the P-port side
(V_CCP). This allows the TCA6408A-Q1 to interface
with next-generation microprocessors and
microcontrollers on the SDA/SCL side, where supply
levels are dropping down to conserve power. In
contrast to the dropping power supplies of
microprocessors and microcontrollers, some PCB
components such as LEDs remain at a higher power
supply.
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA6408A-Q1 provide a
simple solution when additional I/Os are needed for
switches, sensors, push-buttons, LEDs, fans, and so
forth.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TCA6408A-Q1
TSSOP (16)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
I²C or SMBus Master
(e.g. Processor)
VCCI
SDA
SCL
INT
RESET
ADDR
GND
VCCP
P0
P1
P2
P3
TCA6408A-Q1
P4
P5
P6
P7
Peripheral
Devices
x RESET, EN or
Control Inputs
x INT or status
outputs
x LEDs
x Keypad
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.