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TXS0206A: Overshoot and Undershoot Tolerance

Connor Flack
Prodigy 10 points
Part Number: TXS0206A


Can you violate the overshoot and undershoot recommended max voltages if you do not exceed a certain current on this IC?

I know this is pretty typical of IC's and the current spec does not allow a lot of wiggle room for overshoot (rec. max=VCCA/B).

Maybe the real limit is the abs. max, but that also notes permanent damage. Specifically I would be seeing ~200mV overshoot on a 1.8V logic side.

Thank you

  • +1
    Guru 317800 points

    Undershoots must be current-limited to 50 mA. (Often, this happens automatically due to the forward voltage of the clamping diode; check the IBIS model.)

    There are no positive clamping diodes. Voltages above 4.6 V are not allowed at all.

  • +1
    TI__Guru* 97066 points

    Hi Connor,

    Clemens is correct -- but just wanted to add a couple things for clarity.

    With 200mV of over/undershoot you have nothing to worry about.

    The device supports up to 4.6V on the inputs, independent of VCC -- so 2V on the input with 1.8V supply won't cause any issues.

    The negative clamp diodes won't even turn on with -200mV of undershoot. You need to get below -500mV to get them to start conducting. Again - no issue with -200mV on the inputs.