4034 8-bit bidirectional shift register with dual parallel I/O ports and selectable synchronous/asynchronous parallel load. +--------------+ A0 |1 +--+ 24| VCC A1 |2 23| B0 A2 |3 22| B1 A3 |4 21| B2 A4 |5 20| B3 A5 |6 19| B4 A6 |7 4034 18| B5 A7 |8 17| B6 ENA |9 16| B7 D |10 15| CLK B//A |11 14| SY//ASY GND |12 13| LD//SH +--------------+