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TUSB522P: for 3m length FFC cable application

Henry Wang3
Genius 3465 points
Part Number: TUSB522P
Other Parts Discussed in Thread: TUSB564

Tool/software:

Hi Sir,

My customer would like to use the TUSB522P for for 3m length FFC cable, could you please review the below figure and advise some comments? Thanks!

FFC cable insertion loss data

  • 0
    TI__Guru**** 180061 points

    Hi,

    Due to the US Christmas and New Year holiday, the response to your question will be delayed. We have assigned an engineer to this E2E thread and will look into your question when we return. Sorry for the wait and any inconvenience it may cause.

    Thanks,

    David

  • +1 in reply to David (ASIC) Liu
    TI__Guru**** 180061 points

    Hi,

    With the insertion loss around -4dB for the 0.8mm cable, I think you would only need one TUSB522P. But you would also need TUSB546 or TUSB564 to support the Type-C implementation. TUSB546 will be used if this is a source side while TUSB564 will be used if this is a sink side design.

    But besides insertion loss, do you also have the crosstalk data for the FFC cable? The FFC cable typically is not a twisted shieled cable so the crosstalk performance between the USB SuperSpeed signals will not be good and crosstalk can not be compensated by TUSB522P or TUSB546/TUSB564.

    If it possible, please evaluate the system and the FFC cable performance using both the TUSB522P and TUSB546/TUSB564 EVM.

    Thanks

    David