A REVIEW OF LOGIC INTEGRATED CIRCUITS

The 7400 chip, that contains 4 NANDs. The 2 supplemental pins supply electric power (+5 V) and connect the ground. For modest-scale logic, designers now use prefabricated logic gates from family members of products including the TTL 7400 collection by Texas Devices, the CMOS 4000 collection by RCA, as well as their more recent descendants. Progress