#CD74HC4067SM

Description: High-Speed CMOS Logic 16-Channel Analog Multiplexer/Demultiplexer, SSOP-24

Datasheet: http://www.ti.com/lit/ds/symlink/cd74hc4067.pdf

Pinout:

    +-----------+
COM |[ 1]   [24]| VCC
 I7 |[ 2]   [23]| I8
 I6 |[ 3]   [22]| I9
 I5 |[ 4]   [21]| I10
 I4 |[ 5]   [20]| I11
 I3 |[ 6]   [19]| I12
 I2 |[ 7]   [18]| I13
 I1 |[ 8]   [17]| I14
 I0 |[ 9]   [16]| I15
 S0 |[10]   [15]| ~{E}
 S1 |[11]   [14]| S2
GND |[12]   [13]| S3
    +-----------+