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.)