The 74HC/HCT595 are high-speed Si-gate CMOSdevices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.The 74HC/HCT595 is an 8-stage serial shift register with a storage register and 3-state outputs. The shift register and storage register have separate clocks.Data is shifted on the positive-going transitions of the SH_CP input. The data in each register is transferred to the storage register on a positive-going transition of the ST_CP input. 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 (Q7?) 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.Dataseet Logic Type
Shift Register
Number of Circuits
Number of Inputs
Voltage – Supply
2 V ~ 6 V
Operating Temperature
-40°C ~ 125°C
Package / Case
16-SOIC (0.154″, 3.90mm Width)