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DS80PCI402: Differential pairs balanced?

Gregory Duperon
Expert 7560 points
Part Number: DS80PCI402


Is there is a requirement that the differential pairs be balanced (length matched) to other differential pairs in terms of layout?

I understand that the + lane and the – lane of a differential pair need to be balanced (length matched).

  • 0
    TI__Mastermind 43795 points

    Hi Gregory,

    There is a requirement from Intel which requires adjacent pairs or bundles to be matched.  I would recommend to keep them matched within ~ 100mils if possible, since other PCB assemblies in the link might have length differences which are not as easy to compensate.

    When I refer to adjacent pairs:

    Lane 0 - Lane 1

    Lane 2 - Lane 3

    etc.

    Regards,

    Lee