• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 290 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TUSB546-DCI: DP Aux

Fred Cheng
Expert 5970 points
Part Number: TUSB546-DCI


Hi ,

1. I was wondering since as I knew the Aux differential signal is supposed to be 1Vpk~pk, but for example the AUXn resistance is drastically increasing and till switch-off when decreasing- the voltage below 2.7V . My question is why limit the voltage range in the mux, why don't just let it pass freely?

  

2. how does the mechanism mentioned above work internally?

  • 0
    TI__Guru 64326 points

    I cannot share many details here but due to the nature if the AUX-SBU mux the device requires proper bias which should be expected in compliant designs. Typical USB-C DP AUX bus structure will have 100k resistors biasing the bus in between the mux and DP source.