Functional Description
• 8-Bit Shift Register (S-IN, P-OUT)
General
The 74HC164D is a high speed CMOS 8-BIT SERIAL-IN PARALLEL-OUT SHIFT REGISTER fabricated with
silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power
dissipation.
It consists of a serial-in, parallel-out 8-bit shift register with a CK input and an overriding CLR input.
Two serial data inputs (A, B) are provided so that one may be used as a data enable.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
Features
(1) High speed: fMAX = 58 MHz (typ.) at VCC = 5 V
(2) Low power dissipation: ICC = 4.0 μA (max) at Ta = 25 
(3) Balanced propagation delays: tPLH ≈ tPHL
(4) Wide operating voltage range: VCC(opr) = 2.0 to 6.0 V