#74LS192

Description: Synchronous 4-bit Up/Down (2 clk) counter

Datasheet: http://www.ti.com/lit/ds/symlink/sn74ls193.pdf

Pinout:

     +-----------+
   B |[ 1]   [16]| VCC
  QB |[ 2]   [15]| A
  QA |[ 3]   [14]| CLR
DOWN |[ 4]   [13]| ~{BO}
  UP |[ 5]   [12]| ~{CO}
  QC |[ 6]   [11]| ~{LOAD}
  QD |[ 7]   [10]| C
 GND |[ 8]    [9]| D
     +-----------+