• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 516 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCAN1042H: TCAN1042 CAN Termination Resister

Steven He92
Expert 2125 points

Part Number: TCAN1042H

Dear Sir,

My customer would set TCAN1042H CAN bus termination resister 200ohm, have any affect by circuit electrical work?

Thanks!

Steven

  • 0
    TI__Guru 74302 points
    Steven,

    Would the effective termination resistance be 200 ohms? Or 200 ohms in parallel with another 120 ohm termination resistor?

    The CAN bus should still work correctly, but the drivers are designed to drive the correct voltage levels over 60 ohms termination resistance. So your bus voltages may be lower/higher based on the lower current being driven.

    Regards,
  • 0 in reply to Eric Hackett
    TI__Guru 62920 points
    Since the bus termination is also used to help the differential signal transition from the dominant to recessive state (i.e., by discharging the bus capacitance), using a higher termination resistance generally translates to slower signal transitions. This may limit the data rate at which a CAN bus can operate.

    Max