MC74F139

  The MC54/74F139 is a high speed Dual 1-of-4 Decoder/Demultiplexer.MC74F139 has two independent decoders, each accepting two inputs and providing four mutually exclusive 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 F139 can be used as a function generator providing all four miniterms of two variables.