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VCC on SN74AHCT125PWR

Colin Cook1
Prodigy 100 points
Other Parts Discussed in Thread: SN74AHC125

So I have a design that uses a SN74AHCT125PWR, and it's working very well. However, I just realized that I should have used a SN74AHC125PWR because my VCC is only 3.3V. 

So my question is this. Why is it working? Being that far off on VCC should cause it to fail.

If the answer is that the current generation of silicon works just fine at 3.3V I am not going to try and fix this.

Can anyone shed some lite on this.

Thanks.

CC :)

  • 0
    TI__Guru 62100 points
    Hi Colin ,

    It is not recommended operating condition on the datasheet , however , it doesn't mean that it wouldn't work .
    It means that the device has not been characterized to guarantee the performance at that Vcc condition. Almost all the devices will have their tolerance levels above and below the guaranteed values on the datasheet. I would suggest to use the SN74AHC125 to conform to the datasheet conditions.