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74HC164 74HC164B1 8-Bit Serial-In, Parallel-Out Shift Register

  • The 74HC164; 74HCT164 is an 8-bit serial-in/parallel-out shift register.
  • The device features two serial data inputs (DSA and DSB), eight parallel data outputs (Q0 to Q7).
  • Data is entered serially through DSA or DSB and either input can be used as an active HIGH enable for data entry through the other input.
  • Data is shifted on the LOW-to-HIGH transitions of the clock (CP) input.
  • A LOW on the master reset input (MR) clears the register and forces all outputs LOW, independently of other inputs.
  • Inputs include clamp diodes.
  • This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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