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SN65HVD01: Question for VIL

Ming-Tung
Prodigy 20 points
Part Number: SN65HVD01

Hi Support,

We use SN65HVD01 IC on my project, we will generator the signal and connect to pin 5 of SN65HVD01.

According to IC spec, the VIL range is 0~0.3*VL (VL is 3.6V) ==> 0~1.08V, we have measure the waveform as follows:

If we use "min" of oscilloscope, the value is -0.18V, it will be over the spec requirement,

so we want to confirm it, the SN65HVD01 spec requirement is "min" or "low" of oscilloscope?

thanks.

  • 0
    Guru 257020 points

    A little bit of overshoot/undershoot is harmless (and might be a measurement artifact).

  • 0
    TI__Mastermind 45397 points

    Hi Ming-Tung,

    Clemens is correct - a little bit of overshoot/undershoot is harmless and it could be a measurement artifact. 

    With that being said:

    1. The absolute minimum on a logic input pin (like pin 5) is -0.3V, so -0.18V is greater than absolute minimum  so the part will not be damaged. 

    2. The VIL spec is a rec. condition so it will be a bit more strict than absolute max/min conditions - however the low undershoot will not cause a false bit - the device will still read that as a low. 

    Please let me know if you have any other questions!

    Best,

    Parker Dodson