#74LS139

Description: Dual Decoder 1 of 4, Active low outputs

Datasheet: http://www.ti.com/lit/ds/symlink/sn74ls139a.pdf

Pinout:

    +-----------+
  E |[ 1]   [16]| VCC
 A0 |[ 2]   [15]| E
 A1 |[ 3]   [14]| A0
 O0 |[ 4]   [13]| A1
 O1 |[ 5]   [12]| O0
 O2 |[ 6]   [11]| O1
 O3 |[ 7]   [10]| O2
GND |[ 8]    [9]| O3
    +-----------+