The 7400 chip, that contains 4 NANDs. The 2 extra pins offer energy (+5 V) and hook up the bottom. For small-scale logic, designers now use prefabricated logic gates from people of equipment such as the TTL 7400 sequence by Texas Instruments, the CMOS 4000 sequence by RCA, as well as their Newer descendants. More and more, these mounted-perform log… Read More