+---+--+---+ +---+---*---+ 1OE |1 +--+ 14| VCC | A | OE| Y | 1A |2 13| 4OE +===+===*===+ 1Y |3 74 12| 4A | X | 0 | Z | 2OE |4 126 11| 4Y | 0 | 1 | 0 | 2A |5 10| 3OE | 1 | 1 | 1 | 2Y |6 9| 3A +---+---*---+ GND |7 8| 3Y +----------+
+---+--+---+ +---+---*---+ 1OE |1 +--+ 14| VCC | A | OE| Y | 1A |2 13| 4OE +===+===*===+ 1Y |3 74 12| 4A | X | 0 | Z | 2OE |4 126 11| 4Y | 0 | 1 | 0 | 2A |5 10| 3OE | 1 | 1 | 1 | 2Y |6 9| 3A +---+---*---+ GND |7 8| 3Y +----------+