Product details


Number of I/Os 5 Features 1-MHz maximum frequency, Single-wire protocol Supply voltage (Min) (V) 1.65 Supply voltage (Max) (V) 3.6 Addresses 1 Rating Catalog Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 85 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Package | Pins | Size

X2QFN (RUG) 8 2 mm² 1.5 x 1.5 open-in-new Find other I2C general-purpose I/Os (GPIOs)


  • Operating Power-Supply Voltage Range of 1.65 V to 3.6 V
  • Five Independent Push-Pull Outputs
  • Single Input (DIN) Controls State of All Outputs
  • High-Current Drive Outputs Maximum 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)
    • Cell Phones
    • PDAs
    • Portable Media Players
    • MP3 Players
    • Portable Instrumentation

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


The TCA5405 is a 5-bit output expander controlled using a single wire input. This device is ideal for portable applications as it has a wide VCC range of 1.65V to 3.6 V. The TCA5405 uses a self-timed serial data protocol with a single data input driven by a master device synchronized to an internal clock of that device. During a Setup phase, the bit period is sampled, then the TCA5405 generates its own internal clock synchronized to that of the Master device to sample the input over a five-bit-period Data Transfer phase and writes the bit states on the parallel outputs after the last bit is sampled. The TCA5405 is available in an 8-pin 1.5mm × 1.5mm RUG uQFN package.

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

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet Low Voltage 5-Bit Self-Timed, Single-Wire Output Expander, TCA5405 datasheet Mar. 23, 2011
Application note I2C Dynamic Addressing Apr. 25, 2019
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 user guide for TCA7408EVM/TCA5405EVM Dec. 07, 2011

Design & development

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

Hardware development

document-generic User guide

The TCA7408-5405EVM is designed to show the used of multiple TI products on a single evaluation board. It shows how the single-wire 5-bit output expander TCA5405 is used to generate LED blinking functions. The Single wire interface is implemented using a single GPIO port on the MSP430, and very (...)

  • Works with MSP430 Launchpad
  • Illustrates the use of TPL0401 DPOT for color mixing
  • TCA7408 used for key press detection
  • Shows the use of Single wire self timed interface in TCA5405
  • Color mixing, LED blinking control

Design tools & simulation

SCPM021.ZIP (36 KB) - IBIS Model
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 (...)
  • 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
  • (...)
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
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 (...)
  • GUI-based web application
  • Exportable designs
  • JSON file uploader
  • Bill of materials generator

CAD/CAE symbols

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X2QFN (RUG) 8 View options

Ordering & quality

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Support & training

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