View tc74hc238p datasheet:

TC74HC238P IL00 C-MOS 3-TO-8 LINE DECODER/DEMULTIPLEXER —TOP VIEW— 1 15 A Y0 A IN VDD 16 1 2 14 B Y1 3 13 C Y2 B IN Y0 OUT 2 15 12 Y3 11 Y4 C IN Y1 OUT 3 14 4 10 EN1 Y5 5 9 EN2 EN Y6 EN1 IN Y2 OUT 4 13 6 7 EN3 Y7 EN2 IN Y3 OUT 5 12 INPUT OUTPUT EN3 IN Y4 OUT 6 11 EN C B A Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 0 x x x 0 0 0 0 0 0 0 0 Y7 OUT Y5 OUT 7 10 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 0 0 1 0 GND Y6 OUT 8 9 1 0 1 0 0 0 0 0 0 1 0 0 1 0 1 1 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 1 1 0 1 0 0 1 0 0 0 0 0 1 1 1 0 0 1 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 EN = • • EN3 0 : LOW LEVEL EN1 EN2 1 : HIGH LEVEL x : DON’T CARE