74152 8-to-1 line inverting data selector/multiplexer. +----------+ A4 |1 +--+ 14| VCC A3 |2 13| A5 A2 |3 74 12| A6 A1 |4 152 11| A7 A0 |5 10| S0 /Y |6 9| S1 GND |7 8| S1 +----------+ [This information is part of the GIICM]