Automotive 8-bit translating I2C/SMBus I/O expander with interrupt, reset & config registers
Product details
Parameters
Package | Pins | Size
Features
- 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)
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 (VCCI) and on the P-port side (VCCP). 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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TCA6408A-Q1 Low-Voltage 8-Bit I2C and SMBus I/O Expander With Interrupt Output datasheet | Sep. 14, 2016 |
Application note | I2C Dynamic Addressing | Apr. 25, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- IO expander evaluation through LEDs or broken out to headers
- Input evaluation with on board pushbutton switches
- Example code including necessary functions for each IO expander
Software development
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- GUI-based web application
- Exportable designs
- JSON file uploader
- Bill of materials generator
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 16 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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