I bought a cmos 4081 quad 2 input AND gate IC and its 74hct equivelent 74hct08.
In my projects I always go for the cmos 4000 series and use a 9v pp3 battery as they can take from 3-15v
However I thought 74hct was a replacement for 74ls (TTL) and would therfore not function if more than 5v was applied. I gave the 74hct08 9v power supply like the 4000 series and it appeared to function ok other than the fact the pinout was different to the 4000 series (same as ttl pinout)
Can someone explain why the 74hct ic functions still when more than 5v is applied?
In my projects I always go for the cmos 4000 series and use a 9v pp3 battery as they can take from 3-15v
However I thought 74hct was a replacement for 74ls (TTL) and would therfore not function if more than 5v was applied. I gave the 74hct08 9v power supply like the 4000 series and it appeared to function ok other than the fact the pinout was different to the 4000 series (same as ttl pinout)
Can someone explain why the 74hct ic functions still when more than 5v is applied?