Photo Windell Oskay
595 series shift registers come in many flavors. SN74HC595 is the most usual. TPIC6B595 is similar but can be used with more power hungry applications. Pin layouts are different but they all operate in the same way.
Shift register is controlled with three pins. They are usually called
CLOCK. Chip manufacturers have different names. See the table below for two examples from Texas Instruments.