40109 Quad 3-state noninverting buffer/level shifter. VDD supplies the output stage, VCC the input stage. +----------+ +-------------+ VCC |1 +--+ 16| VDD | A | OE| Y | 1OE |2 15| 4OE |---+---+-----| 1A |3 14| 4A | X | 0 | Z | 1Y |4 13| 4Y | 0 | 1 | GND | 2Y |5 40109 12| | 1 | 1 | VDD | 2A |6 11| 3Y +-------------+ 2OE |7 10| 3A GND |8 9| 3OE +----------+ [This information is part of the GIICM]