74265 Dual buffer/inverter plus dual AND/NAND gates. +----------+ 1A |1 +--+ 16| VCC 1Y=1A 1Y |2 15| 4A /1Y |3 14| 4Y 2Y=2A*2B 2A |4 74 13| /4Y 2B |5 265 12| 3B 3Y=3A*3B 2Y |6 11| 3A /2Y |7 10| 3Y 4Y=4A GND |8 9| /3Y +----------+ [This information is part of the GIICM]