• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 34 subscribers
  • Views 301 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.

TLK6201EA LOS question

Peter (Big) Pan
Prodigy 80 points

Hello,

Attached are TLK6201 schematic and measured 12G SAS OOB waveform.

So far, we cannot detect SAS loss of signal from LOS pin out, it always is high level when have or not OOB signal.

Please help to check and provide your comments.

  • 0
    TI__Mastermind 20820 points

    Hi Peter Pan,

    The TLK6201 is only characterized up to 6.25Gbps so I am little confused over why you would be using this part in a SAS3 application? I believe that this is at the root of the problem you are seeing with the LOS pin. For a sanity check I put the TLK6201 on my bench and put a 6G and 12G signal through it and the LOS pin behaved normally but the output eye at 12G was non existent.

    Now there are most likely several differences between my 12G source and your SAS transmitter which may or may not be why the LOS pin on my board operated the way that I expect. Can you verify that your LOS pin is working correctly at 6G for me?