I2C ICs

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

TCAL9538 NEW

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

Approx. price (USD) 1ku | 0.61
TCA39306-Q1 NEW

Automotive FM+ I²C bus and SMBus voltage translator

Approx. price (USD) 1ku | 0.35
TCAL6408 NEW

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

Approx. price (USD) 1ku | 0.5
TCAL9539-Q1 NEW

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

Approx. price (USD) 1ku | 0.77
TCAL6416 NEW

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

Approx. price (USD) 1ku | 0.72
TCAL9539 NEW

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

Why choose our I2C ICs

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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.

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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.

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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.
Video
Video
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

Discover featured applications

Data Center & Enterprise
TI’s I2C, I3C and SMBus devices help provide effective data center and enterprise solutions.
Factory automation & control
Optimize efficiency in factory automation and control designs by integrating I2C devices.
Wired networking
Provide faster speeds, stability and reliability in wired networking applications through I2C and I3C devices.

TI’s I2C, I3C and SMBus devices help provide effective data center and enterprise solutions.

  • TI’s I2C buffers aide in maintaining signal integrity through features, such as hot insertion/swap, to prevent lockups from occurring. 
  • Our I2C switches eliminate address bus conflicts often seen in designs with multiple optical modules.
  • Our I2C level shifters help resolve voltage-level mismatch on I2C bus devices in data center and enterprise applications with voltage-level translation from .85 V to 5.5 V. 

Featured resources

REFERENCE DESIGNS
  • TIDA-01608 – Isolated Current Sense with Integrated Shunt Resistor and I2C Interface Reference Design
HARDWARE DEVELOPMENT
  • IO-EXPANDER-EVM – IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module
DESIGN TOOLS AND SIMULATION

Optimize efficiency in factory automation and control designs by integrating I2C devices.

  • TI’s I2C buffers and cable extenders enable long-distance communication needs as far as 20 m at 400 kHz. 
  • Our I2C general-purpose input/output (GPIO) expanders allow for up to 24 I/O’s, while also being available in small packages providing cost competitive solutions. 
  • Our I2C level shifters help resolve voltage-level mismatch on I2C bus devices in factory automation and control designs with voltage-level translation from .85 V to 5.5 V. 

Featured resources

REFERENCE DESIGNS
  • TIDA-060013 – Reference design for I2C range extension: I2C to CAN
  • TIDA-00403 – Ultrasonic Distance Measurement using the TLV320AIC3268 miniDSP CODEC Reference Design
  • TIDA-00580 – Automotive-Qualified 16-Bit Rotary Quadrature Decoder Reference Design
HARDWARE DEVELOPMENT
  • IO-EXPANDER-EVM – IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module
SOFTWARE DEVELOPMENT

Provide faster speeds, stability and reliability in wired networking applications through I2C and I3C devices.

  • Our devices include up to I3C -compliant data rates (12.5 MHz), enabling fast communication for wired interface applications such as routers and data center switches.
  • Provide stability in your wired networking applications through programmable features found in our devices, such as output drive strength and latch-able interrupts. 
  • TI’s portfolio of devices has safety features, such as software reset call, hot-swap capability, and stuck bus recovery, that provide reliability for your wired networking designs.

Featured resources

REFERENCE DESIGNS
  • TIDA-00269 – Gigabit Ethernet link aggregator reference design
HARDWARE DEVELOPMENT
  • IO-EXPANDER-EVM – IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module
SOFTWARE DEVELOPMENT

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.