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SN74LVC3G17: Inputs overvoltage tolerant

Koshi Ninomiya
Expert 4105 points
Part Number: SN74LVC3G17

Dear Team,

SN74LVC3G17 has the inputs overvoltage tolerant feature, and the datasheet describes as follows,
 - Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC.

What does the "at any valid VCC" mean?
Does it mean that VCC is from 1.65V to 5.5V of recommended operating range?
Or does it mean that VCC is from 0V to 5.5V?

When input voltage becomes 5.5V under VCC=0V or lower than 1.65V, is the SN74LVC3G17 still tolerant to VI=5.5V?
Or does the SN74LVC3G17 got any damage?

I look forward to your reply.
Thank you.

Best Regards,

Koshi Ninomiya

  • +1
    Guru 242810 points

    "At any valid VCC" just means that the upper limit of 5.5 V is independent from VCC.

    When VCC is not valid (below 1.65 V), the device will not work correctly, but this is not the the fault if the input voltage.

    5.5 V is allowed with any VCC (even when 0 V) without damaging the device.