Isolated CAN Flexible Data (FD) Rate Repeater Reference Design


Design files


CAN and CANopen are legacy Fieldbus protocols used in many applications in factory automation. Whenever high voltage can damage the end equipment, there is need for isolation. This isolated CAN flexible data (FD) rate repeater reference design adds electrical isolation between two CAN bus segments. The CAN frames on either bus segment side are repeated to the other side. The CAN transceiver and arbitration logic in this design support CAN FD speed up to 2 Mbps. The reference design is supplied by a wide-range voltage supply between 6 V to 36 V.

  • Isolated CAN FD transceiver with 3000-VRMS isolation rating
  • Support classic CAN and 2-Mbps CAN FD
  • Single 24-V industrial supply
  • Wide-supply voltage range of 5 V to 36 V
  • Onboard generation of isolation voltages
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LM51663V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq

Data sheet: PDF | HTML
AND gates

SN74LVC2G082-ch, 2-input 1.65-V to 5.5-V 32 mA drive strength AND gate

Data sheet: PDF | HTML
CAN transceivers

TCAN1042HFault Protected CAN Transceiver With Flexible Data-Rate

Data sheet: PDF | HTML
Digital isolators

ISO7721Robust EMC, dual-channel, 1/1, reinforced digital isolator

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74LVC2G042-ch, 1.65-V to 5.5-V inverters

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP3985150-mA, low-dropout voltage regulator with bypass & enable

Data sheet: PDF | HTML
NAND gates

SN74LVC2G1322-ch, 2-input, 1.65-V to 5.5-V NAND gates with Schmitt-Trigger inputs

Data sheet: PDF
Noninverting buffers & drivers

SN74LVC2G072-ch, 1.65-V to 5.5-V buffers with open-drain outputs

Data sheet: PDF | HTML
OR gates

SN74LVC32AFour-channel, two-input, 1.65V to 3.6V 24mA drive strength OR gate

Data sheet: PDF | HTML
TVS diodes

TVS330033V flat-clamp surge protection device

Data sheet: PDF | HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet: PDF | HTML

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Design tools & simulation

Simulation model

TIDA-01487 Simulation — TIDM014.ZIP (25 K)

Technical documentation

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Type Title Date
* Design guide Isolated CAN FD Repeater Reference Design (Rev. A) Apr. 13, 2018

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TINA-TI SPICE-based analog simulation program

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