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Product details

Parameters

Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin Supply voltage (Min) (V) 1.65 Supply voltage (Max) (V) 3.6 Addresses 4 Rating Automotive Frequency (Max) (kHz) 400 Operating temperature range (C) -40 to 125 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Package | Pins | Size

TSSOP (PW) 24 34 mm² 7.7 x 4.4 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Features

  • Qualified for Automotive Applications
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • Active-Low Reset Input
  • 5-V Tolerant Input and Output Ports
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Polarity Inversion Register
  • Internal Power-on-Reset
  • No Glitch on Power Up
  • Address by Two Hardware Address Pins for Use of up to Four Devices
  • Latched Outputs 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)

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

Description

The TCA9539-Q1 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 3.6 V. The device supports 100-kHz (I2C Standard mode) and 400-kHz (I2C Fast mode) clock frequencies. I/O expanders such as the TCA9539-Q1 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-Q1 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-Q1 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-Q1 has a hardware RESET pin that can be used to reset the device to its default state.

The TCA9539-Q1 I2C I/O expander is qualified for automotive applications.

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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TCA9539-Q1 Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output, Reset Pin, and Configuration Registers datasheet (Rev. C) Dec. 03, 2018
Application notes I2C Dynamic Addressing Apr. 25, 2019
Application notes Choosing the Correct I2C Device for New Designs Sep. 07, 2016
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

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
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

Design tools & simulation

SIMULATION MODELS Download
SCPM025.ZIP (98 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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
  • (...)
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
Cascade imaging radar capture reference design using Jacinto™ ADAS processor
TIDEP-01017 The cascade development kit has two main use cases:
  1. To use the MMWCAS-DSP-EVM as a capture card to fully evaluate the AWR2243 four-chip cascade performance by using the mmWave studio tool, please read the TIDEP-01012 design guide.
  2. To use the MMWCAS-DSP-EVM to develop radar real time SW application (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive-Qualified 16-Bit Rotary Quadrature Decoder Reference Design
TIDA-00580 People prefer to use knobs over touchscreens in many situations.  This solution minimizes the required connections to a microcontroller to monitor a rotary quadrature encoder's direction and distance of rotation.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Body Control Module Driver Reference Design
TIDA-00296 TIDA-00296 is a reference design that highlights TI's high-side and low-side relay, motor, and load driver portfolios. The loads for this design (door locks, window lifts, seat heaters, HVAC, lamps, and LEDs) were chosen to show the range of loads that a BCM can drive and how TI's solutions fit into (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 24 View options

Ordering & quality

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