Reference design for I2C range extension: I2C to CAN
TIDA-060013
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Key Document

Description

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.

Features
  • 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

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
P82B96  Dual Bidirectional Bus Buffer  I2C  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
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TCAN1042HGV-Q1 Download Download
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Technical Documents

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User guides (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

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