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TUSB501: TUSB501

Moshe Ben gigi
Prodigy 60 points
Part Number: TUSB501

HI,

Is it possible (or make sense ) to concatenate two TUSB on a long USB3.0 path to over come high loss alonge the path, On opposite sides one near the host another near the device connector ?

Did you have any expirance or hear about such a solution ?

In case of Single device, is it right to implemnt one device near the Host on the TX lane and another near the device connector on the host RX lane or both Re-drive should be semtrical on the path ?

Best Regards

Moshe

  • 0
    TI__Guru 64326 points

    Hi Moshe,

    It is possible to use two devices in the same path to support long trace lengths. I recommend trying to use only one device if possible. What are the expected trace lengths that you would like to support?

    Typically redrivers should be placed closest to the connector to compensate for the most trace loss between host and connector. For TUSB501 you can place one near the connector on the TX lane such that the RX EQ of TUSB501 can cancel out the loss of the trace. For RX channel you can place TUSB501 near the host.  

  • 0 in reply to Malik Barton57
    Prodigy 60 points

    Hi Malik

    Thnaks for yhe quick response

    unfortunately It will be to late to "trynng" (I'm in the final stages of PCB's Eddting ) and too complicated to simulate the real PATH (to missing data See Attached drawing ).

    Why the hesitation in your answe ?

    any past experience in a similar solution (concatenate two re-drive device ) ?

    Is the concern is possible of jittering between the two device ?

    Best Regards

    Moshe

    USB-Path.pdf

  • 0 in reply to Moshe Ben gigi
    TI__Guru 64326 points

    Hi Moshe,

    Using one redriver is recommend to avoid signal compression which can occur when there is not enough loss between the multiple redrivers. From you block diagram this wont be an issue. In cases like this where long FFC cables are used a second redriver is actually needed to help compensate.