Pin # | Name | Pin Type ----------------------------- 1 | CLK | Input 2 | X3 | Input 3 | X2 | Input 4 | X1 | Input 5 | X0 | Input 6 | NC | Input 7 | NC | Input 8 | NC | Input 9 | NC | Input 10 | GND | GND 11 | /OE | Input 12 | Y | Output 13 | NC | NC 14 | NC | NC 15 | NC | NC 16 | NC | NC 17 | NC | NC 18 | NC | NC 19 | NC | NC 20 | VCC | VCC