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74HC595 Datasheet

74HC595 IC The 74HC595 datasheet specifies that this IC is a 8-stage serial shift registers with a storage register and 3-state outputs. The registers have separate clocks. contain an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register.

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.

74HC595 pin configuration

74HC595 features

  • 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

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