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DS125BR401A: design problem

Rachel Lu
Prodigy 215 points
Part Number: DS125BR401A

Dear team,

Could you help answer below questions?

1. Will you suggest the PCIE Redriver is close to CPU or TBT?

 

2. Whether the 2.5GHz is corresponding to 5GT/s speed?

Thank you.

  • +1
    TI__Guru* 93670 points

    Hi Rachel,

    1). Let's put DS125BR401A close to the CPU. Note:

    CPU TX should go to the A side input of the DS125BR401A. We should have 3-4dB loss - at minimum between CPU and the A-side input of the BR401A.

    CPU RX would get connected to the BR401A B-side TX. We need to make sure insertion loss is within the limit of the BR401A as noted in the data sheet.

    2). Yes your understanding is correct. 2.5GHz corresponds to the 5Gbps or PCIe Gen2 data rate.

    Regards ,,Nasser

  • 0 in reply to Nasser Mohammadi
    TI__Prodigy 215 points

    Hi Nasser Mohammadi,

    Thank you for the quick reply. I will confirm them with customer.

    Thank you.