View tc74hc154p datasheet:

TC74HC154P IL00 ********** C-MOS 4-TO-16 LINE DECODER/DEMULTIPLEXER –TOP VIEW– A B C D EN2 EN1 Y15 Y14 Y13 Y12 Y11 1 Y0 IN IN IN IN IN IN OUT OUT OUT OUT OUT 2 Y1 24 23 22 21 20 19 18 17 16 15 14 13 3 Y2 VDD 23 4 (+2 to +6V) A Y3 22 5 B Y4 21 6 C Y5 20 7 D Y6 8 Y7 9 Y8 GND 10 Y9 1 2 3 4 5 6 7 8 9 10 11 12 11 Y10 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 13 Y11 OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT 18 14 EN1 Y12 19 15 EN2 Y13 16 Y14 17 Y15 INPUTS OUTPUTS EN1 EN2 D C B A Y15 Y14 Y13 Y12 Y11 Y10 Y9 Y8 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1