View tc74hc158p datasheet:

TC74HC158P IL00 ********** C-MOS 2-LINE-TO-1-LINE INVERTED DATA SELECTOR/MULTIPLEXER -TOP VIEW- INH Y0 Y1 YC X0 X1 XC 2 V0 IN IN IN OUT IN IN OUT 3 V1 VC 4 16 15 14 13 12 11 10 9 VDD 5 W0 1 1 6 W1 WC 7 0 0 0 0 11 X0 1 1 10 X1 XC 9 GND 14 Y0 1 2 3 4 5 6 7 8 13 Y1 YC 12 A V0 V1 VC W0 W1 WC IN IN IN OUT IN IN OUT A INH CONT. IN ON 1 15 INH A CHANNEL 0 0 0 0 ; LOW LEVEL 0 1 1 1 ; HIGH LEVEL 1 X GND X ; DON'T CARE NOTE : TYPE VDD + + 74AC/HC 2 to 6V + 74ACT/HCT 5V