3 ms·
I bet these are built with 74HCxx ICs, which are not TTL whatsoever; in fact they are CMOS.
by IWeldMelons 8y ago
I bet these are built with 74HCxx ICs, which are not TTL whatsoever; in fact they are CMOS.
- ttldude 8y agoYou can build them with 74xx, 74LSxx as well as 74HCTxx, or mix those. Mixing with 74HC is also possible if you're careful, but full 74HC won't work.