• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 345 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

HD3SS3220: Using with TUSB1002A, AC coupling caps

KevinMD
Prodigy 130 points
Part Number: HD3SS3220
Other Parts Discussed in Thread: TUSB1002A

We'd like to implement a TUSB1002A redriver with the HD3SS3220 mux. What signals require AC coupling caps, and where should they placed? Thanks

  • 0
    TI__Guru**** 156171 points

    Hi,

    You would put the AC coupling caps on both the TX and RX between the host and the redriver. The spec defines the caps to be min 75nF and max 265nF. Typical cap value can be 100nF or 220nF.

    Between the redriver and the HD3SS3220 is going to be DC coupled.

    You would also need AC coupling caps on TX1/2 and RX1/2 between the HD3SS3220 and the connector. The cap value for TX1/2 can be 100nF or 220nF. The caps on RX1/2 is optional but I recommend to add them. The value is 330nF.

    I would also recommend using 201 size to minimize impedance discontinuity.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 130 points

    David, thanks for the quick reply. I have a completed schematic, could I send to you in private message for feedback?

  • 0 in reply to KevinMD
    TI__Guru**** 156171 points

    Hi,

    Can you please accept my friendship request so you can send the schematic in a private message?

    Thanks

    David