XJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC CONNECTION DIAGRAMS DIP (TOP VIEW) ENABLE VCC G B1 20 19 18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8 11 ENABLE VCC G B1 20 19 18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8 11 1 DIR 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 A8 10 GND 1 DIR 2 A1 3 A2 .