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SN65HVD23: Layout Impedance for Bus Lines

Allan Fan
Expert 7110 points
Part Number: SN65HVD23


Team,

Typically we will need to have differential bus lines with 120ohm impedance and 120ohm termination resistors at the end. But if we use split termination, from our layout guide suggestion, is it still 120ohm differential pair? what is trace impedance of trace width? Thanks.

Regards,

Allan

  • 0
    TI__Mastermind 25705 points
    Allan,
    Yes. With the split termination, the bus impedance should be still close to 120Ohm. The trace width depends on the board structure (material, layers, distance, etc). You can calculate it in any EM solvers. Please let me know if you have any more questions.
    Regards,
    Hao