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DS100KR401: Reg : DS100KR401SQE/NOPB supported protocols

Arun Gomathi R
Prodigy 50 points
Part Number: DS100KR401
Other Parts Discussed in Thread: DS100DF410, DS125BR820

Dear Team,

Good day to all!!!

I am trying to use DS100KR401SQE/NOPB for XLPPI interface in my design. Whether it will support or not?

Are there any recommendations/rules to be considered while interfacing a XLPPI interface with DS100KR401SQE/NOPB.

Expecting your support at the earliest.

Regards,
Arun Gomathi R
Hardware Design Engineer
DATA PATTERNS INDIA LTD
Chennai

  • 0
    TI__Mastermind 22032 points

    Hi Arun,

    From some quick research, XLPPI is similar to SFP+ requirements.  How long is your channel?  I expect DS100KR401 to support SFP+ assuming that the host also meets SFP+ electrical characteristics, but if the channel is very long, a retimer might also be worth considering.  Note that since this is just a redriver, it will compensate for jitter due to channel loss (ISI), but will not reduce inherent jitter from the host transmitter like Rj.  If your host transmitter is not capable of meeting front port requirements due to inherent jitter, please consider a retimer like DS100DF410.

    Also, you might consider DS125BR820 as we have an application note on using this device in 40 GbE applications.  

    https://www.ti.com/lit/an/snla226/snla226.pdf

    In general, you should consider where the device is placed in your signal chain.  The amount of insertion loss before and after the device will impact its performance.  You can use an IBIS-AMI simulation along with your channel models to add confidence to your design.

    Thanks,

    Drew