• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 33 subscribers
  • Views 1012 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.

HD3SS3212: HD3SS3212 / Case of the operation with VCM=0V

S.Satoshi
Guru 21685 points
Part Number: HD3SS3212
Other Parts Discussed in Thread: USB-CTM-MINIDK-EVM

Hi,

Please let me ask the case of the operation with VCM=0V. From the USB specification, the differential voltage pp is 1.2V diff pp so the negative swing will be -0.3V when VCM=0V. I believe that it will not damage to HD3SS3212 because abs max of Differential I/O is -0.5V. but then I'd like to know if you can guarantee to use with this condition.

Please let me know if you need more information.

Best Regards,

Satoshi / Japan Disty

  • 0
    TI__Mastermind 36085 points

    Hello Satoshi-san,

        The device won't guarantee the proper functionality in such conditions, the absolute maximum ratings are intended to avoid device damage, but the recommended operating conditions provides a frame that guarantees the device functionality. In this case, the minimum differential input voltage is 0.

    Regards,

    Diego.

  • 0 in reply to Diego Cortes
    Guru 21685 points
    Hi Diego,

    We understand that it can't be recommended to pass the signal that swing below 0V, but my customer would like to see the actual behavior when it's used with no DC bias condition. So can you take it and give the captured waveform? I know that HD3SS3212 is implemented in USB-CTM-MINIDK-EVM but it's quite complex to evaluate only HD3SS3212.

    Best Regards,
    Satoshi