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TCAN1042V-Q1: Question for branching CAN line

Lee, Sam
Expert 4965 points
Part Number: TCAN1042V-Q1

Hi team,

Can you answer the following question for TCAN1042V-Q1?

Is it possible to branch one CAN line to two CAN lines as below picture?

Thanks,

Sam Lee

  • 0
    TI__Guru 62910 points
    Hi Sam,

    CAN uses a shared differential bus (CANH and CANL signals) to connect each node in parallel and allow them to communicate on the network. Isn't this what your diagram is showing? Or, am I misinterpreting what you are asking?

    Max
  • 0 in reply to Max Robertson
    TI__Expert 4965 points
    Hi Max,

    It's not a common connection. A customer wanted to check if it is possible to use two branches with one differential line from a CAN transceiver.
    Is it okay?

    Thanks,
    Sam Lee
  • 0 in reply to Lee, Sam
    TI__Guru 62910 points
    Hi Sam,

    Sorry, I still don't think I understand what is unusual about the connection. Do you think you could draw a more detailed diagram that shows what these branches would connect to?

    If you look at Figure 16 in the TCAN1042V-Q1 datasheet, it shows a typical use case made up of multiple nodes. What would be different between the branches in this application and the branches shown in this figure? Is your concern related to the lengths of the different branches?

    Max
  • 0 in reply to Max Robertson
    TI__Expert 4965 points

    Hi Max,

    Thank you for your clarification. I misunderstood it while interpreting the picutre. It seems to be a typical bus application.

    Thanks,

    Sam Lee