Optimize I2C signals, increase system reliability and extend system functionality

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Simplify your I2C bus and reduce communication errors with our robust portfolio of I2C buffered translators, I/O expanders and switches. These devices are available in wide voltage ranges and small industry standard packages for ease of implementation in a variety of applications. 

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Related categories
I2C isolators

Bidirectional I2C isolators for robust communication


Automotive 16-bit low voltage I²C/SMBus I/O expander w/interrupt, reset and agile I/O configuration

Approx. price (USD) 1ku | 0.77
TCA39306-Q1 NEW

Automotive FM+ I²C bus and SMBus voltage translator

Approx. price (USD) 1ku | 0.35

16-bit translating I²C-bus/SMBus I/O expander with interrupt, reset, and agile I/O configuration

Approx. price (USD) 1ku | 0.72

16-bit low-voltage I²C-bus and SMBus I/O expander with interrupt, reset and agile I/O configuration

Approx. price (USD) 1ku | 0.7

Remote 4-Bit I²C and SMBus I/O expander with configuration register, interrupt and reset

Approx. price (USD) 1ku | 0.45

Remote 4-Bit I²C and SMBus I/O expander with configuration register and interrupt

Approx. price (USD) 1ku | 0.45

Why choose our I2C ICs


Enhance your design

Our products offer a variety of features such as multiple channel count, small packages and voltage supply voltage ranges to fit your design needs while meeting I2C requirements.


Achieve secure communication between devices

Features such as level shifting, hot insertion, frequencies ranging from 100 kHz to 12,500 kHz and safety filters enable our devices to provide secure communication.


Reduce your design cost

Our portfolio of l2C and I3C devices are designed to offer reliable solutions that reduce the number of external components and power consumption while saving board space and reducing design cost.

Technical resources

Video series
Video series
TI Precision Labs training videos
Start the I2C series to learn about the I2C standard, the basics of the data protocol and the physical signaling used, and how translator and buffer devices can be used to resolve application-level issues.
I3C technology training
I2C has been the primary interface choice for embedded devices for multiple years. Learn about the next generation of serial communication: I3C, key differences between I2C and I3C and the key advantages of I3C.
Application note
Application note
Understanding the I2C Bus
The I2C bus is a very popular and powerful bus used for communication between different peripherals. Learn how the I2C bus actually works.
document-pdfAcrobat PDF

Design & development resources

Design tool
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 (...)
Evaluation board
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.

Simulation tool
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 (...)

Reference designs related to I2C ICs

Use our reference design selection tool to find designs that best match your application and parameters.