#74LS151

Description: Multiplexer 8 to 1

Datasheet: http://www.ti.com/lit/gpn/sn74LS151

Pinout:

     +-----------+
  I3 |[ 1]   [16]| VCC
  I2 |[ 2]   [15]| I4
  I1 |[ 3]   [14]| I5
  I0 |[ 4]   [13]| I6
   Z |[ 5]   [12]| I7
~{Z} |[ 6]   [11]| S0
~{E} |[ 7]   [10]| S1
 GND |[ 8]    [9]| S2
     +-----------+