74534 8-bit 3-state inverting D flip-flop. +----------+ +---------------+ /OE |1 +--+ 20| VCC |/OE|CLK| D |/Q | /Q1 |2 19| /Q8 |---+---+---+---| D1 |3 18| D8 | 1 | X | X | Z | D2 |4 17| D7 | 0 | / | 0 | 1 | /Q2 |5 74 16| /Q7 | 0 | / | 1 | 0 | /Q3 |6 534 15| /Q6 | 0 |!/ | X | - | D3 |7 14| D6 +---------------+ D4 |8 13| D5 /Q4 |9 12| /Q5 GND |10 11| CLK +----------+ [This information is part of the GIICM]