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DS125DF410: 25MHz external Osc as the 25M reference clock for sync-E application

Shawn_Wang
Expert 3811 points

Part Number: DS125DF410

Hi team

Could you help check if a 25MHz external Osc. which is not the sync-E recovered clock could be as the 25M reference clock of DS125DF410 in a sync-E application? 

  • 0
    TI__Mastermind 19235 points

    Hi,

    On the TI retimer the 25MHz reference clock does not actually feed into the high-speed datapath. This clock is merely used as a reference for the digital logic. The TI retimer implements a reference-less CDR architecture i.e. the clock is recovered from input data and then used for retiming. So in conclusion the 25MHz reference clock for retimer does not need to be in any way synchronized to the data.

    Thanks,

    Rodrigo Natal