Shift Register 8-Bit - 74HC595

The 74HC595 high speed shift register utilizes
advanced silicon-gate CMOS technology. This device pos-
sesses the high noise immunity and low power consump-
tion of standard CMOS integrated circuits, as well as the
ability to drive 15 LS-TTL loads.
This device contains an 8-bit serial-in, parallel-out shift reg-
ister that feeds an 8-bit D-type storage register. The stor-
age register has 8 3-STATE outputs. Separate clocks are
provided for both the shift register and the storage register.
The shift register has a direct-overriding clear, serial input,
and serial output (standard) pins for cascading. Both the
shift register and storage register use positive-edge trig-
gered clocks. If both clocks are connected together, the
shift register state will always be one clock pulse ahead of
the storage register.
The 74HC logic family is speed, function, and pin-out com-
patible with the standard 74LS logic family. All inputs are
protected from damage due to static discharge by internal
diode clamps to V
CC
and ground.