The CD74AC138, CD74ACT138, CD74AC238, and CD74ACT238 are 3-to-8-line decoders/demultiplexers that utilize the Harris Advanced CMOS Logic technology. Both circuits have three binary select inputs (A0, A1, and A2). If the device is enabled, these inputs determine which one of the eight normally HIGH outputs of the AC/ACT138 will go LOW or which on of the normally LOW outputs of the AC/ACT238 will go HIGH. Two active LOW and one active HIGH enables (E1, E2 and E3) are provided to simplify the cascading of these devices.