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SN74LVC2G06-EP Ground Bounce / Overshoot Specs

Richard Zarr
Intellectual 2850 points
Other Parts Discussed in Thread: SN74LVC2G06-EP

Can some explain what these two specifications are and how they are measured (from the SN74LVC2G06-EP datasheet):

1) Typical VOLP (Output Ground Bounce): <0.8 V at VCC = 3.3 V, TA = 25°C

2) Typical VOHV (Output VOH Undershoot): >2 V at VCC = 3.3 V, TA = 25°C

I need to know under what conditions this is a benefit or a problem.  Thanks...

  • 0
    TI__Intellectual 2850 points
    This was posted last week and there has been no reply... can someone please answer this...
  • 0 in reply to Richard Zarr
    TI__Guru 62930 points

    Rick, I was OOO end of last week, and am just now able to address your question.

    This is not a tested spec, and unfortunately there is not any data showing how these metrics were characterized.

    From my understanding, these are representative of maximum ground bounce or voh undershoot when all outputs switching except the output being monitored.  It gives an indication that a VIH/VIL limit (to an input from this driver) will not be violated on an unswitched output due to other outputs switching.

    Likely the data was based on a 50pf load. 

    Having minimum power and ground inductance routing and sufficient decoupling capacitance to device will keep the internal ground/Vcc bounce to a minimum.

    Regards,

    Wade