74238 1-of-8 noninverting decoder/demultiplexer. +----------+ +-----------------------------------------+ S0 |1 +--+ 16| VCC |EN1|/EN2|/EN3| S2| S1| S0|/Y0|/Y1|...|/Y7| S1 |2 15| Y0 |---+----+----+---+---+---+---+---+---+---| S2 |3 14| Y1 | 0 | X | X | X | X | X | 0 | 0 | 0 | 0 | /EN3 |4 74 13| Y2 | 1 | 1 | X | X | X | X | 0 | 0 | 0 | 0 | /EN2 |5 238 12| Y3 | 1 | 0 | 1 | X | X | X | 0 | 0 | 0 | 0 | EN1 |6 11| Y4 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | Y7 |7 10| Y5 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | GND |8 9| Y6 | 1 | 0 | 0 | . | . | . | 0 | 0 | . | 0 | +----------+ | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | +-----------------------------------------+ [This information is part of the GIICM]