SN74HC08: Difference between SN74HC08DR and SN74AVCT08DR

Hi Victor,

I think you have a typo in the second part number -- we don't have an 'ATC' logic family. Assuming you meant ACT instead.

You can see the breakdown of a logic part number in this short video: https://training.ti.com/anatomy-logic-part-number 

Both are "08" functions (quad 2-input AND gates) and both are in the "D" package (SOIC).

The primary difference between the two part numbers you've listed is the family -- probably HC vs ACT.  There's a Logic Guide that goes into details on each family's features.

The "T" indicates "TTL-Compatible CMOS inputs"

If you actually mean the SN74ACT08DR: the main difference is that the latter has TTL-compatible inputs, higher drive strength, and higher speed. (See www.ti.com/assets/js/compareParts/compare.html?parts=SN74HC08,SN74ACT08.) In other words, neither the inputs nor the outputs are 100 % compatible, depending on circumstances.

What is the actual problem you're trying to solve? There might be a better alternative for either one.