The TC74VHC164 is an advanced 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
Bipolar Schottky TTL while maintaining the CMOS low
power dissipation.
It consists of a serial - in, parallel - out 8-bit shift register
with a CLOCK input and an overriding CLEAR input.
Two serial data inputs (A, B) are provided so that one may
be used as a data enable.
An input protection circuit ensures that 0 to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back up.
This circuit prevents device destruction due to mismatched
supply and input voltages.

FEATURES:
• High Speed.........
•ÍMAX=175MHz(typ.)
at Vcc=5V
Icc=4A(Max.)at Ta = 25°C
•VNIH =VNIL = 28% Vcc (Min.)
Low Power Dissipation..
High Noise Immunity
• Power Down Protection is provided on all inputs.
Balanced Propagation Delays tpLH=tpHL
• Wide Operating Voltage Range.
Low Noise.
• Pin and Function Compatible with 74ALS164
Vcc (opr) = 2V~5.5V
.VOLP=0.8V (Max.)