Hi team,
As the thread you reply in below, the SN74AHC08 is with Schmitt trigger input and the range is 200mV.
But still confuse that from your post, when VCC=3V, VIL and VIH are 1.5 and 1.7V.
In the SN74AHC08 datasheet, VIL and VIH are 0.9 and 2.1V and between 0.9~2.1V, they are unknown or they are Smitt trigger range since I cannot see the spec from the datasheet?
https://e2e.ti.com/support/logic/f/151/p/852977/3154580#3154580
Also, for the SN74AHC08 operated as below conditions and waveforms as below pictures.
You can see Y is oscillate.
Does that cause the SN74AHC08 damage if usually under the conditions even that's no over absolute max rating?
VCC=3.3V
A is yellow waveform (SR is less than the datasheet max value), B is 3.3V.
Y is blue waveform.
Thank you!