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DP83822I: the High/Low threshold voltage for both MDC and MDIO

Ken Zhang
Expert 3755 points

Part Number: DP83822I

hi,

  Just double check with that when VDDIO=3.3V, the High input voltage for signals on both MDC and MDIO is 1.7v, and Low input voltage for them is 0.8V, is it right?

  • +1
    TI__Mastermind 26165 points

    Hi Zhang,

    Definition of VIH is the lowest voltage that the PHY can recognize as high or pull up is 1.7V. If the voltage is less than 1.7V, the PHY cannot recognize whether it is pull high or pull low and result in an unkonwn stage. 1.7V is the boundary voltage, we still recommend pull up voltage equals to VDDIO for high voltage signal and 0V for low voltage signal.

    --

    Regards,

    Hillman Lin