I2C, I3C & SPI ICs
Optimize I2C signals, increase system reliability and extend system functionality
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Reduce design cost and simplify your I2C/I3C bus with our robust portfolio of I2C/I3C buffered translators, I/O expanders and switches. These devices are available in wide voltage ranges and small industry standard packages for a seamless implementation in a variety of applications.
Related categories
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
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
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
Understanding the I2C Bus (Rev. A)
The I2C bus is a very popular and powerful bus used for communication between different peripherals. Learn how the I2C bus actually works.
Discover featured applications
BODY ELECTRONICS & LIGHTING
I/O management in automotive zonal & body domain controllers
I/O management in automotive zonal & body domain controllers
Modern automotive ECU is driving demand for increased general purpose input/output (GPIO) resources while maintaining compact and predictable system behavior. Our GPIO expanders provide a scalable and deterministic solution for digital input and output expansion, while multi-switch detection interface (MSDI) devices offer feature-rich autonomous switch monitoring in space-constrained ECU designs.
Benefits:
- Functional Safety-Capable
- Minimize board space and reduce MCU pin usage with built-in functionality
- Improve system reliability with advanced protection and diagnostic capabilities
Featured resources
END-EQUIPMENT / SUB-SYSTEM
REFERENCE DESIGNS
- TIDA-020094 – 48V zone reference design
- TIDA-020079 – Zone reference design
- TIDA-00296 – Automotive Body Control Module Driver Reference Design
PRODUCTS
- TXE8124-Q1 – Automotive 24-bit SPI bus I/O expander with interrupt, reset, and I/O configurable registers
- TIC12400-Q1 – Automotive 35-V multi-switch detection interface (MSDI) with SPI & integrated ADC
- TCA9539A-Q1 – Automotive 16-bit 1.65 to 5.5V I²C/SMBus I/O expander with interrupt, reset and config registers
HARDWARE DEVELOPMENT
- TXE81XXEVM – TXE81XX evaluation module
- TIC12400EVM-KIT – Evaluation module kit for the TIC12400-Q1 24-input multiple-switch-detection interface
- IO-EXPANDER-EVM – IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module
Data Center & Enterprise
TI’s I2C, I3C and SMBus devices help provide effective data center and enterprise solutions.
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
END-EQUIPMENT / SUB-SYSTEM
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
- I2C-DESIGNER – I2C designer tool
- PSPICE-FOR-TI – PSpice® for TI design and simulation tool
Factory automation & control
Optimize efficiency in factory automation and control designs by integrating I2C devices.
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
END-EQUIPMENT / SUB-SYSTEM
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
- I2C-DESIGNER – I2C designer tool
- PSPICE-FOR-TI – PSpice® for TI design and simulation tool
Wired networking
Provide faster speeds, stability and reliability in wired networking applications through I2C and I3C devices.
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
END-EQUIPMENT / SUB-SYSTEM
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
- I2C-DESIGNER – I2C designer tool
- PSPICE-FOR-TI – PSpice® for TI design and simulation tool
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
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 (...)
New products
Automotive 24-bit SPI bus I/O expander with interrupt, reset, and I/O configurable registers
Approx. price (USD)1ku |0.558