Home Interface I2C & I3C ICs I2C general-purpose I/Os (GPIOs)

TCA9539

ACTIVE

16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers

Product details

Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 5.5 Addresses 4 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 5.5 Addresses 4 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4 VQFN (RGE) 24 16 mm² 4 x 4 WQFN (RTW) 24 16 mm² 4 x 4
  • 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)
  • 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)

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.

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.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
NEW TCAL9539 ACTIVE 16-bit low-voltage I²C-bus and SMBus I/O expander with interrupt, reset and agile I/O configuration Enhanced version of TCA9539 with wider supply voltage range and agile I/O configuration registers

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 11
Type Title Date
* Data sheet TCA9539 Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output, Reset Pin, and Configuration Registers datasheet (Rev. C) PDF | HTML 26 Apr 2016
Application note I2C: What is the Auto Increment Feature? PDF | HTML 05 Jul 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Application note I2C Dynamic Addressing 25 Apr 2019
Technical article How to create a dynamic power solution for stepper motors, relays and LEDs PDF | HTML 01 Nov 2016
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 07 Sep 2016
Selection guide I2C Infographic Flyer 03 Dec 2015
Application note Understanding the I2C Bus PDF | HTML 30 Jun 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 15 May 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 Feb 2015
EVM User's guide I/O Expander EVM User's Guide (Rev. A) 25 Jul 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

IO-EXPANDER-EVM — IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module

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.

User guide: PDF
Not available on TI.com
Firmware

SLVC564 I/O Expander Software and Firmware Package

Supported products & hardware

Supported products & hardware

Products
I2C general-purpose I/Os (GPIOs)
TCA6408A 8-bit translating 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers TCA6408A-Q1 Automotive 8-bit translating I2C/SMBus I/O expander with interrupt, reset & config registers TCA6416A 16-bit translating 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers TCA6424A 24-bit translating 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers TCA9534 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt & config registers TCA9534A 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, & config registers TCA9535 16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt & config registers TCA9538 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers TCA9539 16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers TCA9554 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers TCA9554A 8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers TCA9555 16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers
Hardware development
Evaluation board
IO-EXPANDER-EVM IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module
Simulation model

TCA9539 IBIS Model

SCPM025.ZIP (98 KB) - IBIS Model
Design tool

I2C-DESIGNER — I2C designer tool

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 (...)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
Reference designs

TIDEP-01008 — Multi-sensor platform reference design on Jacinto™ ADAS processors

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00403 — Ultrasonic Distance Measurement using the TLV320AIC3268 miniDSP CODEC Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 24 Ultra Librarian
VQFN (RGE) 24 Ultra Librarian
WQFN (RTW) 24 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos