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Original question:

DS250DF810: SigCon Architect GUI question

DS250DF410: DS250DF410 application discussion

Ben Kuo
Expert 7455 points
Part Number: DS250DF410
Other Parts Discussed in Thread: DS110DF410, DS125DF1610, DS100MB203

Dear team,

We would like to design DS250DF410 in SFI/10G KR application as MUX function. 

Since I cannot find SFI support  information from device datasheet, any risk for this application?

Looking forward your feedback, thank.

Regards,

Ben

  • 0
    TI__Mastermind 19235 points

    Hi Ben,

    If your application is 10Gbps data rate only then the DS110DF410 may be a better fit depending on what your system configuration looks like. For 25G support the DS250DF410 is a suitable choice.

    • The DS250DF410 Rx CTLE boost is optimized for 25Gbps
      • As a result this retimer has lower Rx EQ boost at 5GHz, in the order of ~15dB.
      • Thus the DS250DF410 retimer Rx EQ cannot compensate for the 10G-KR worst case insertion loss by itself. Tx EQ help is needed
      • However, the DS250DF410 can compensate for the worst case insertion loss per 25G-KR
    • The DS110DF410 can fully compensate for worst case insertion loss per 10G-KR
    • The TI retimers do not support the optional KR link training feature. So KR link training should be disabled in the system when implementing these TI retimers
    • Both the DS250DF410 and DS110DF410 fully support the SFI host Tx and Rx requirements per SFF-8431

    Regards,

    Rodrigo Natal

  • 0 in reply to Rodrigo Natal
    TI__Expert 7455 points

    Hi Rodrigo,

    I would like to double check with you, does DS110DF410 also can implement below application?

    Thanks,

    Ben

  • +1 in reply to Ben Kuo
    TI__Mastermind 19235 points

    The DS110DF410 does not have mux/crosspoint function. Within the TI 10G retimers portfolio the DS125DF1610 has crosspoint.

     https://www.ti.com/product/DS125DF1610

    Another alternative would be the DS100MB203 10G redriver with mux.

    https://www.ti.com/product/DS100MB203

    The DS250DF410 could also be considered but your system channel insertion loss budget would need to be evaluated more closely.

    Regards,

    Rodrigo Natal