#74LS85

Description: 4-bit Comparator

Datasheet: http://www.ti.com/lit/gpn/sn74LS85

Pinout:

     +-----------+
  B3 |[ 1]   [16]| VCC
IA<B |[ 2]   [15]| A3
IA=B |[ 3]   [14]| B2
IA>B |[ 4]   [13]| A2
OA>B |[ 5]   [12]| A1
OA=B |[ 6]   [11]| B1
OA<B |[ 7]   [10]| A0
 GND |[ 8]    [9]| B0
     +-----------+