74153 8-to-2 line noninverting data selector/multiplexer with separate enables. +----------+ /1EN |1 +--+ 16| VCC S1 |2 15| /2EN 1A3 |3 14| S0 1A2 |4 74 13| 2A3 1A1 |5 153 12| 2A2 1A0 |6 11| 2A1 1Y |7 10| 2A0 GND |8 9| 2Y +----------+ [This information is part of the GIICM]