View tc74hc245p datasheet:

TC74HC245P IL08 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS —TOP VIEW— 18 2 DIR IN 1 20 DIR 17 VDD 3 16 4 A1 2 19 IN G 15 5 A B 14 6 A2 3 18 B1 13 7 DIR 12 8 A3 4 17 B2 11 9 DIR G A4 5 16 B3 1 19 DIR OPERATION G A5 6 15 B4 0 0 B to A 0 1 A to B A6 7 14 B5 1 x HI-Z A7 8 13 B6 0 : LOW LEVEL 1 : HIGH LEVEL A8 9 12 B7 x : DON’T CARE HI-Z : HIGH IMPEDANCE 10 GND 11 B8 B1 B2 B3 B4 B5 B6 B7 B8 18 17 16 15 14 13 12 11 19 G 1 DIR 2 3 4 5 6 7 8 9 A1 A2 A3 A4 A5 A6 A7 A8