#74LS390

Description: Dual BCD 4-bit counter

Datasheet: http://www.ti.com/lit/gpn/sn74LS390

Pinout:

       +-----------+
~{CP0} |[ 1]   [16]| VCC
    MR |[ 2]   [15]| ~{CP0}
    Q0 |[ 3]   [14]| MR
~{CP1} |[ 4]   [13]| Q0
    Q1 |[ 5]   [12]| ~{CP1}
    Q2 |[ 6]   [11]| Q1
    Q3 |[ 7]   [10]| Q2
   GND |[ 8]    [9]| Q3
       +-----------+