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TUSB522P: belongs to linear or limiting redriver

daniel
Genius 5095 points
Part Number: TUSB522P


Hi Team,

Please help to confirm TUSB522P is linear or limiting redriver.

And what is the main difference between linear and limiting redriver.

Thanks

  • 0
    TI__Guru 64326 points

    Daniel,

    TUSB522P is a limited redriver.

    Limited redriver take incoming signal, amplify and buffer them to produce new output characterizations (output voltage swing and de-emphasis equalization). Linear redrivers do not buffer and the output is a linear function of its input and does not produce new output characteristics (no new output voltage swing and de-emphasis equalization).

  • 0 in reply to Malik Barton57
    Genius 5095 points
    Dear Malik,

    Many thanks for your help.
    We heard from other vendor that if two redrivers are limited, they can't place too close.
    Any layout constraint on limited redriver?

    Thanks
  • 0 in reply to daniel
    TI__Guru 64326 points

    daniel,

    Limited redrivers have the ability to over equalize a signal and create bit errors when using multiple limited redriver. Putting them close to each other and in the same signal path can cause this situation. There is not an explicit rule or layout constraint however insertion loss of the channel between each redriver should be taken into account so that you are not over equalizing your signal. I recommend keeping the equalization low on the second redriver to avoid this situation.