7411158 8-to-4 line inverting data selector/multiplexer. +----------+ S |1 +--+ 20| 1A0 /1Y |2 19| 1A1 /2Y |3 18| 2A0 GND |4 17| 2A1 GND |5 7411 16| VCC GND |6 158 15| VCC GND |7 14| 3A0 /3Y |8 13| 3A1 /4Y |9 12| 4A0 /EN |10 11| 4A1 +----------+ [This information is part of the GIICM]