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SN74LVC1G58: VT+ threshold range on 5V vcc

Shu-Cheng LIN
Guru 11785 points
Part Number: SN74LVC1G58
Other Parts Discussed in Thread: SN74AHCT1G125

Hi Sirs,

Sorry to bother you.

As title, we would like know SN74LVC1G58 VT+ threshold range on 5V vcc .

Because the test voltage only show 4.5v and 5.5v on datasheet page 5.

Our spec is 5V vcc and 3.3v input, is meet VT+ threshold range??

Thanks for your reply

  • 0
    Guru 277140 points

    Your spec might say "5 V", but all power supplies have tolerances.
    The datasheet assumes ± 10 %, that's why the values are specified for 4.5 V.

    In other words: with a VCC of 5 V + 10 % in the worst case, your signals will only be detected as high if they are above 3.33 V.

    It would be a better idea to add a separate level translator (e.g., SN74AHCT1G125), or to choose a different device with 3V-compatible inputs.