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DS100BR210 Question

Paul Joseph
Expert 2785 points
Other Parts Discussed in Thread: DS64BR111, DS100BR210

I need to drive pair(s) of ~4Gbps unidirectional differential CML signals over a variable length cable (up to 10m). I was looking at the DS100BR210 which seems to fit needs but is designed for running up to ~10Gbps (vs. the DS64BR111 which is closer at 6.4Gbps but bidirectional in it's pinout).

Given that there does not seem to be any retiming in the device, what impact would running the DS100 at a lower bitrate have on the signal (given the device reports being multi-protocol such as SAS at 6Gbps)?

Please advise, thank you.

  • 0
    TI__Mastermind 43795 points

    Hi Paul,

    The Continuous Time Linear Equalization (CTLE) for the DS64BR111 and DS100BR210 works over a very broad range of serial datarates (from ~ 2 Gbps up to 10 Gbps).  At 4 Gbps the DS100BR210 can still provide plenty of enough gain to equalize 10m of typical twin-axial cable.

    Both of these devices can also be configured to provide output de-emphasis for driving long cables or traces.

    Regards,

    Lee