74155 Datasheet, ON Semiconductor

The LS156 is fabricated with the Schottky barrier diode process for high speed and are completely compatible with all M.

The LS156 is a Dual 1-of-4 Decoder/Demultiplexer with common Address inputs and separate gated Enable inputs. When enabled, each decoder section accepts the binary weighted Address inputs (A0, A1) and provides four mutually exclusive active LOW outpu.