#74LS194

Description: Shift Register 4-bit Bidirectional

Datasheet: http://www.ti.com/lit/gpn/sn74LS194

Pinout:

    +-----------+
 MR |[ 1]   [16]| VCC
DSR |[ 2]   [15]| Q0
 P0 |[ 3]   [14]| Q1
 P1 |[ 4]   [13]| Q2
 P2 |[ 5]   [12]| Q3
 P3 |[ 6]   [11]| CP
DSL |[ 7]   [10]| S1
GND |[ 8]    [9]| S0
    +-----------+