#74LS145

Description: Decoder 1 to 10, Open Collector

Datasheet: http://www.ti.com/lit/gpn/sn74LS145

Pinout:

    +-----------+
 Q0 |[ 1]   [16]| VCC
 Q1 |[ 2]   [15]| P0
 Q2 |[ 3]   [14]| P1
 Q3 |[ 4]   [13]| P2
 Q4 |[ 5]   [12]| P3
 Q5 |[ 6]   [11]| Q9
 Q6 |[ 7]   [10]| Q8
GND |[ 8]    [9]| Q7
    +-----------+