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SN65DP159: Questions Regarding HDMI Retimer SN65DP159 for PCB Trace Length

Tom Tsao
Intellectual 590 points
Part Number: SN65DP159

Tool/software:

Hi E2E,

We are currently working on a project that involves using the SN65DP159RSB retimer, and I have some questions related to the PCB trace length and placement:

  1. Extended PCB Trace Length: Considering that our PCB uses TU-662 material, how much trace length extension can we achieve using the SN65DP159RSB retimer?

  2. Placement Recommendations: Are there any specific guidelines or restrictions regarding the placement of the retimer on the PCB to ensure optimal performance?

I would appreciate your support and advice on these points.

Thank you!

  • 0
    TI__Mastermind 23992 points

    Hi Tom,

    Thanks for your questions on the SN65DP159.  I've reached out to the experts on this device and am expecting feedback within the next 24 hours.

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    TI__Mastermind 22535 points

    Hi Drew,

    Thanks for pointing this thread to me!

    Hi Tom,

    Are you able to share a block diagram of your design?

    Its best to place a redriver/ retimer in the middle 1/3 of the lossy trace/ signal path as this allows for maximum signal conditioning on the RX (equalization), and TX (pre-emphasis, output swing). 

    As per the exact trace length extension, please have a look at this trace budgeting tool. This is an experimental toll that helps gauge how risky a design in based off of the characteristics of the PCB trace and system used.

    Keep in mind this is only an estimate, and I highly recommend you send us the layout, once completed, for review.

    RX & TX trace length budgeting - TI information - selective disclosure - revH.xlsx

    password: ti

    Best,

    Vishesh Pithadiya