74ACT139PC PDF 데이터시트 검색

74AC139 74ACT139 Dual 1-of-4 Decoder, Demultiplexer November 1988 Revised November 1999 74AC139 74ACT139 Dual 1-of-4 Decoder, Demultiplexer General Description The AC, ACT139 is a high-speed, dual 1-of-4 decoder, demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutuallyexclusive active-LOW outputs. Each decoder has an active-LOW Enable input which can be used as a data input for a 4-output demultiplexer. Each half of the AC, ACT139 can be