16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers
Product details
Parameters
Package | Pins | Size
Features
- I2C to Parallel Port Expander
- Low Standby-Current Consumption
- Open-Drain Active-Low Interrupt Output
- Active-Low Reset Input
- 5-V Tolerant I/O Ports
- Compatible With Most Microcontrollers
- 400-kHz Fast I2C Bus
- Input and Output Configuration Register
- Polarity Inversion Register
- Internal Power-on Reset
- No Glitch on Power Up
- Noise Filter on SCL and SDA Inputs
- Address by Two Hardware Address Pins for Use
of up to Four Devices - Latched Outputs With High-Current Drive
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)
Description
The TCA9539 is a 24-pin device that provides 16 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 (VCC) range from 1.65 V to 5.5 V. The device supports 100-kHz (I2C Standard mode) and 400-kHz (I2C Fast mode) clock frequencies. I/O expanders such as the TCA9539 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 TCA9539 include an interrupt that is generated on the INT pin whenever an input port changes state. The A0 and A1 hardware selectable address pins allow up to four TCA9539 devices on the same I2C bus. The device can be reset to its default state by cycling the power supply and causing a power-on-reset. Also, the TCA9539 has a hardware RESET pin that can be used to reset the device to its default state.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TCA9539 Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output, Reset Pin, and Configuration Registers datasheet (Rev. C) | Apr. 26, 2016 |
Application note | I2C Dynamic Addressing | Apr. 25, 2019 | |
Technical article | How to create a dynamic power solution for stepper motors, relays and LEDs | Nov. 01, 2016 | |
Application note | Choosing the Correct I2C Device for New Designs | Sep. 07, 2016 | |
Selection guide | I2C Infographic Flyer | Dec. 03, 2015 | |
Application note | Understanding the I2C Bus | Jun. 30, 2015 | |
Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | May 15, 2015 | |
Application note | I2C Bus Pull-Up Resistor Calculation | Feb. 13, 2015 | |
User guide | I/O Expander EVM User's Guide (Rev. A) | Jul. 25, 2014 |
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
Reference designs
Design files
-
download TIDEP-01008 BOM.pdf (254KB) -
download TIDEP-01008 Assembly Files.zip (2027KB) -
download TIDEP-01008 Layer Plots.zip (2151KB) -
download TIDEP-01008 CAD Files.zip (19327KB) -
download TIDEP-01008 Gerber.zip (9248KB)
Design files
-
download TIDA-00403 BOM.pdf (282KB) -
download TIDA-00403 Assembly Drawing.pdf (1710KB) -
download TIDA-00403 PCB.pdf (1839KB) -
download TIDA-00403 CAD Files.zip (11KB) -
download TIDA-00403 Gerber.zip (3899KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 24 | View options |
VQFN (RGE) | 24 | View options |
WQFN (RTW) | 24 | 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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