7409 Quad 2-input open-collector AND gates. +----------+ +-----------+ 1A |1 +--+ 14| VCC | A | B | Y | Y = AB 1B |2 13| 4B |---+---+---| 1Y |3 12| 4A | 0 | 0 | 0 | 2A |4 7409 11| 4Y | 0 | 1 | 0 | 2B |5 10| 3B | 1 | 0 | 0 | 2Y |6 9| 3A | 1 | 1 | Z | GND |7 8| 3Y +-----------+ +----------+ [This information is part of the GIICM]