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TDP158: Trace length and trace impedance requirement from GPU to TDP158 and TDP158 to connector

Prodigy 590 points

Replies: 1

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Part Number: TDP158

Hi Team,

What is the maximum trace length and trace impedance for below lines?

L1: GPU to cap

L2: Cap to TPD158

L3: TPD158 to HDMI connector

And any layout guides for TDP158?

Best regards,

Dylan

  • Dylan

    The DP158 equalizer can compensate up to 15.5dB loss on the input side. Please take a look at section 9.2.3 and you can see the DP158 is able to open up the eye after a 20in 4mil trace. On the connector side, it has a 3.5dB pre-emphasis.

    Please take a look at the GPU and see if the GPU has a specific requirement on the differential impedance. If not, please follow the HDMI spec impedance of 100ohm +/- 15%.

    Attached is the HDMI layout design guide.

    5706.Texas Instruments HDMI Design Guide.pdf

    Thanks

    David

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