+---+--+---+ +---+---+---*---+---+---+---+ /1EN |1 +--+ 16| VCC |/EN| S1| S0| Y0| Y1| Y2| Y3| 1S0 |2 15| /2EN +===+===+===*===+===+===+===+ 1S1 |3 14| 2S0 | 1 | X | X | 0 | 0 | 0 | 0 | 1Y0 |4 13| 2S1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1Y1 |5 4555 12| 2Y0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1Y2 |6 11| 2Y1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1Y3 |7 10| 2Y2 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | GND |8 9| 2Y3 +---+---+---*---+---+---+---+ +----------+