Datasheet

1. General description
The 74HC595; 74HCT595 are high-speed Si-gate CMOS devices and are pin compatible
with Low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC
standard No. 7A.
The 74HC595; 74HCT595 are 8-stage serial shift registers with a storage register and
3-state outputs. The registers have separate clocks.
Data is shifted on the positive-going transitions of the shift register clock input (SHCP).
The data in each register is transferred to the storage register on a positive-going
transition of the storage register clock input (STCP). If both clocks are connected together,
the shift register will always be one clock pulse ahead of the storage register.
The shift register has a serial input (DS) and a serial standard output (Q7S) for cascading.
It is also provided with asynchronous reset (active LOW) for all 8 shift register stages. The
storage register has 8 parallel 3-state bus driver outputs. Data in the storage register
appears at the output whenever the output enable input (OE
) is LOW.
2. Features and benefits
 8-bit serial input
 8-bit serial or parallel output
 Storage register with 3-state outputs
 Shift register with direct clear
 100 MHz (typical) shift out frequency
 ESD protection:
 HBM JESD22-A114F exceeds 2000 V
 MM JESD22-A115-A exceeds 200 V
 Multiple package options
 Specified from 40 C to +85 C and from 40 C to +125 C
3. Applications
 Serial-to-parallel data conversion
 Remote control holding register
74HC595; 74HCT595
8-bit serial-in, serial or parallel-out shift register with output
latches; 3-state
Rev. 7 — 26 January 2015 Product data sheet