+---+--+---+ +----+---+---*---+---+ /RST |1 +--+ 16| VCC |/RST|CLK| D | Q |/Q | Q1 |2 15| Q4 +====+===+===*===+===+ /Q1 |3 14| /Q4 | 0 | X | X | 0 | 1 | D1 |4 74 13| D4 | 1 | / | 0 | 0 | 1 | D2 |5 175 12| D3 | 1 | / | 1 | 1 | 0 | /Q2 |6 11| /Q3 | 1 |!/ | X | - | - | Q2 |7 10| Q3 +----+---+---*---+---+ GND |8 9| CLK +----------+