+-----+--+-----+ +---+---+---*---+ 1RST |1 +--+ 24| VCC |/OE| LE| D | Q | 1LE |2 23| 2Q3 +===+===+===*===+ /1OE |3 22| 2D3 | 1 | X | X | Z | 1D0 |4 21| 2Q2 | 0 | 0 | X | - | 1Q0 |5 20| 2D2 | 0 | 1 | 0 | 0 | 1D1 |6 19| 2Q1 | 0 | 1 | 1 | 1 | 1Q1 |7 4508 18| 2D1 +---+---+---*---+ 1D2 |8 17| 2Q0 1Q2 |9 16| 2D0 1D3 |10 15| /2OE 1Q3 |11 14| 2LE GND |12 13| 2RST +--------------+