74540 8-bit 3-state inverting buffer/line driver. +----------+ /OE1 |1 +--+ 20| VCC A1 |2 19| /OE2 A2 |3 18| /Y1 A3 |4 17| /Y2 A4 |5 74 16| /Y3 A5 |6 540 15| /Y4 A6 |7 14| /Y5 A7 |8 13| /Y6 A8 |9 12| /Y7 GND |10 11| /Y8 +----------+ [This information is part of the GIICM]