741821 10-bit 3-state D flip-flop/bus driver. +----------+ +---------------+ Q5 |1 +--+ 24| Q6 |/OE|CLK| D | Q | Q4 |2 23| Q7 |---+---+---+---| Q3 |3 22| Q8 | 1 | X | X | Z | Q2 |4 21| Q9 | 0 | / | 0 | 0 | Q1 |5 20| Q10 | 0 | / | 1 | 1 | VCC |6 741 19| CLK | 0 |!/ | X | - | /OE |7 821 18| GND +---------------+ D1 |8 17| D10 D2 |9 16| D9 D3 |10 15| D8 D4 |11 14| D7 D5 |12 13| D6 +----------+ [This information is part of the GIICM]