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Switching for CAN or USB

Brian Angiel
Expert 4070 points
Other Parts Discussed in Thread: TMUX1072, TMUX136

Hi team,

In one of my designs, I will have either CAN or USB communicating to my micro (CAN for typical use, USB for updates). I'd like to find a switch that will allow my to route either CAN or USB to my micro. I'd also like for it to be able to withstand faults in the +/-35V range (+/-15V at least).

Do you have any recommendations as to how to accomplish this?

Brian

  • 0
    TI__Mastermind 45575 points

    Brian,

    The TMUX1072 is a 2-channel 2:1 switch that could support USB2.0,  5V CAN, and 20V OVP .   I know there is a TCAN1042 device that has the fault protection you require but I'm not sure about a USB transceiver.

    Do you have a diagram for what you are doing? 

    If you place a mux on the digital side of the CAN transceiver do you still need the mux to have the +/- 35 fault protection?  If that is the case the TMUX136 could be an option as well.

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    TI__Expert 4070 points

    Hi Adam,

    Thank you. To clarify your feedback, TMUX136 is a good option if the Fault protection is not needed between the CAN TRx and MCU? I couldn't find anything in the datasheet that specified Fault or OV protection.

    Thanks,

    Brian

  • 0 in reply to Brian Angiel
    TI__Mastermind 45575 points
    Brian,

    Correct, the TMUX136 does not have OVP and would be a good choice if OVP is not needed.

    Thank you,
    Adam