7411020 Dual 4-input NAND gates with buffered output. +----------+ +-------------------+ ____ 1B |1 +--+ 14| | A | B | C | D |/Y | /Y = ABCD 1A |2 13| 1C |---+---+---+---+---| /1Y |3 12| 1D | 0 | X | X | X | 1 | GND |4 7411 11| VCC | 1 | 0 | X | X | 1 | /2Y |5 020 10| 2A | 1 | 1 | 0 | X | 1 | 2D |6 9| 2B | 1 | 1 | 1 | 0 | 1 | 2C |7 8| | 1 | 1 | 1 | 1 | 0 | +----------+ +-------------------+ [This information is part of the GIICM]