Before revision: +Logic supply voltages Supply voltage Technology Logic families (examples) Reference 5V, 10V, 15V Metal CMOS 4000, 74C 5V TTL 7400, 74S, 74LS, 74ALS, 74F, 74H 5V BiCMOS 74ABT, 74BCT 5V CMOS (TTL I/O) 74HCT, 74AHCT, 74ACT 3.3V, 5V CMOS 74HC, 74AHC, 74AC 5V LVCMOS 74LVC, 74AXP 3.3V LVCMOS 74LVC, 74AUP, 74AXC, 74AXP 2.5V LVCMOS 74LVC, 74AUP, 74AUC, 74AXC, 74AXP 1.8V LVCMOS 74LVC, 74AUP, 74AUC, 74AXC, 74AXP 1.5V LVCMOS 74AUP, 74AUC, 74AXC, 74AXP 1.2V LVCMOS 74AUP, 74AUC, 74AXC, 74AXP 3-level logic In three-state logic, an output device can be in one of three possible states: 0, 1, or Z, with the last meaning high impedance.
After revision: +Logic supply voltages Supply voltage Technology Logic families (examples) Reference 5V, 10V, 15V Metal CMOS 4000, 74C 5V TTL 7400, 74S, 74LS, 74ALS, 74F, 74H 5V BiCMOS 74ABT, 74BCT 5V CMOS (TTL I/O) 74HCT, 74AHCT, 74ACT 3.3V, 5V CMOS 74HC, 74AHC, 74AC 5V LVCMOS 74LVC, 74AXP 3.3V LVCMOS 74LVC, 74AUP, 74AXC, 74AXP 2.5V LVCMOS 74LVC, 74AUP, 74AUC, 74AXC, 74AXP 1.8V LVCMOS 74LVC, 74AUP, 74AUC, 74AXC, 74AXP 1.5V LVCMOS 74AUP, 74AUC, 74AXC, 74AXP 1.2V LVCMOS 74AUP, 74AUC, 74AXC, 74AXP 3-state logic In three-state logic, an output device can be in one of three possible states: 0, 1, or Z, with the last meaning high impedance.