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TRS3253E: TRS3253E RX issue

HENRY JUNG
Expert 2030 points
Part Number: TRS3253E

DEARS.

We are testing the TRS3253E on our board.

TX confirms normal operation.

Rx signal does not operation.

Is there a problem with our schematic?

Please review.

Thank you

  • 0
    TI__Mastermind 25705 points

    Henry,

    The schematic looks good to me. There are a few things we can debug. 1) Can you check V+ and V- to see if they match the voltage level of the TX output? 2) Can you check if FORCEON is pulled high (like FORCEOFF_bar), can RX work? TRS3253E has power down feature. Quote from datasheet,

    "With auto-powerdown plus enabled, the device activates automatically when a valid signal change is applied to any receiver or driver input.

    After 30 seconds of inactivity the device will automatically power down to save power."

    In the meantime you can monitor INVALID_bar pin to see if it goes low.

    Please let me know if you still have questions. I will continue to debug with you.

    Regards,

    Hao