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DS125BR111: Difference typical limitation of Trace length of equal differential path

TerryU
Prodigy 145 points
Part Number: DS125BR111

Hi Experts,

I would use a DS125BR111 as redriver for 12Gbps SAS-3 interface and am designing a printed board. In this case, is there any typical tolerance for equal length trace for differential Tx/Rx lines?

 Best regards,

Tetsu

  • 0
    TI__Genius 10946 points

    Hi Tetsu,

    I am unfamiliar with the length matching requirements/tolerance for SAS-3, this will depend on the SAS-3 spec and the requirements of the receiver used.

    I have seen differential lines matched within <5mils in past designs, but simulation is recommended to confirm if the mismatch is acceptable depending on the propagation delay and receiver requirements.

    Thank you,

    Evan

  • 0 in reply to Evan Mayhew
    Prodigy 145 points

    Hi Evan,

    Thank you very much.

    I will do simulation and check board performance by the data.

    Best regards,

    Tetsu