Reference design for I2C range extension: I2C to CAN
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


This reference design focuses on extending I2C range from on-board to off-board through transmission cables using CAN transceivers and then converting the signal back to I2C. This approach allows for better signal integrity due to the differential signaling of the CAN transceivers. The differential signals allow for better EMI rejection, lower power, less concern of different ground potentials between boards, and the capability to use termination compared to extending the I2C lines using solely I2C buffers.

  • Bidirectional Communication
  • I/O Voltage Range Supports 3.3V to 5V
  • 100 kHz I2C frequency support
  • Bus Fault Protection: +/-58 V (non-H variants) and +/-70V (H variants)
  • Thermal Shutdown Protection
  • Supports common-mode shifts up to +/-30 V without loss of function, allowing for communication between systems using different ground references

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
P82B96  2-bit bidirectional 2- to 15-V 400-kHz I2C/SMBus buffer/cable extender  I2C ICs  Sample & Buy Not Available
TCAN1042HGV-Q1  Automotive Fault Protected CAN Transceiver With Flexible Data-Rate  Interface  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
P82B96 Download Download
Download Download
Download Download
Download Download
TCAN1042HGV-Q1 Download Download
Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 2728 07 Jan 2019
Design files (5)
Title Type Size (KB) Date
ZIP 529 07 Jan 2019
ZIP 522 07 Jan 2019
PDF 117 07 Jan 2019
PDF 36 07 Jan 2019
PDF 92 07 Jan 2019

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective 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 visit our Support page.

Technical articles