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Product details

Parameters

Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin VCC (Min) (V) 1.65 VCC (Max) (V) 5.5 Addresses 4 Rating Catalog Frequency (Max) (kHz) 400 Operating temperature range (C) -40 to 85 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Package | Pins | Size

TSSOP (PW) 24 34 mm² 4.4 x 7.8 VQFN (RGE) 24 16 mm² 4 x 4 WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other I2C general-purpose I/Os (GPIOs)

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)
open-in-new Find other I2C general-purpose I/Os (GPIOs)

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.

open-in-new Find other I2C general-purpose I/Os (GPIOs)
Download

Technical documentation

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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 notes I2C Dynamic Addressing Apr. 25, 2019
Technical articles How to create a dynamic power solution for stepper motors, relays and LEDs Nov. 01, 2016
Application notes Choosing the Correct I2C Device for New Designs Sep. 07, 2016
Selection guides I2C Infographic Flyer Dec. 03, 2015
Application notes Understanding the I2C Bus Jun. 30, 2015
Application notes Maximum Clock Frequency of I2C Bus Using Repeaters May 15, 2015
Application notes I2C Bus Pull-Up Resistor Calculation Feb. 13, 2015
User guides 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

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The IO expander evaluation module (EVM) lets you evaluate TI's portfolio of SMBus and I2C IO expander line devices. The TCA6424A and TCA9539 come installed on the board. The 24-pin TSSOP footprint also supports TCA6408A, TCA6416A, TCA9534, TCA9534ATCA9535, TCA9538, TCA9554, TCA9554A and TCA9555.

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

FIRMWARE Download
SLVC564A.ZIP (2137 KB)

Design tools & simulation

SIMULATION MODELS Download
SCPM025.ZIP (98 KB) - IBIS Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
DESIGN TOOLS Download
I2C designer tool
I2C-DESIGNER — Use the I2C Designer tool to quickly resolve conflicts in addressing, voltage level and frequency in I2C based designs. Enter master and slave inputs to automatically generate an I2C tree or easily build a custom solution. This tool will help designers save time and comply with the I2C standard with (...)
Features
  • GUI-based web application
  • Exportable designs
  • JSON file uploader
  • Bill of materials generator

Reference designs

REFERENCE DESIGNS Download
Multi-sensor platform reference design on Jacinto™ ADAS processors
TIDEP-01008 The multi-sensor platform reference design for Advanced Driver Assistance Systems (ADAS) from D3 Engineering provides qualified developers with a fully functioning evaluation platform for testing and development of ADAS applications, for use primarily in the automotive industry.  D3 also offers (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Ultrasonic Distance Measurement using the TLV320AIC3268 miniDSP CODEC Reference Design
TIDA-00403 The TIDA-00403 reference design uses off-the-shelf EVMs for ultrasonic distance measurement solutions using algorithms within the TLV320AIC3268 miniDSP. In conjunction with TI’s PurePath Studio design suite, a robust and user configurable ultrasonic distance measurement system can be designed (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 24 View options
VQFN (RGE) 24 View options
WQFN (RTW) 24 View options

Ordering & quality

Support & training

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