#74LS26

Description: Quad 2-input NAND Open collector

Datasheet: http://www.ti.com/lit/gpn/sn74LS26

Pinout:

    +-----------+
  ~ |[ 1]   [14]| VCC
  ~ |[ 2]   [13]| ~
  ~ |[ 3]   [12]| ~
  ~ |[ 4]   [11]| ~
  ~ |[ 5]   [10]| ~
  ~ |[ 6]    [9]| ~
GND |[ 7]    [8]| ~
    +-----------+