M54HC164

M74HC164

October 1992

8 BIT SIPO SHIFT REGISTER

B1R

(Plastic Package)

ORDER CODES :

M54HC164F1R

M74HC164M1R

M74HC164B1R

M74HC164C1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

.

HIGH SPEED

.

LOW POWER DISSIPATION

.

OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.

BALANCED PROPAGATION DELAYS

.

SYMMETRICAL OUTPUT IMPEDANCE

.

HIGH NOISE IMMUNITY

.

WIDE OPERATING VOLTAGE RANGE

.

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS164

DESCRIPTION

The M54/74HC164 is a high speed CMOS 8 BIT

SIPO SHIFT REGISTER fabricated in silicon gate

C

formance of LSTTL combined with true CMOS low

power consumption.

The HC164 is an 8 bit shift register with serial data

entry and an output from each of the eight stages.

Data is entered serially through one of two inputs (A

or B), either of these inputs can be used as an active

high enable for data entry through the other input.

An unused input must be high, or both inputs con-

nected together. Each low-to-high transition on the

clock input shifts data one place to the right and

enters into QA, the logic NAND of the two data inputs

(A

⋅ B), the data that existed before the rising clock

edge. A low level on the clear input overrides all

other inputs and clears the register asynchronously,

forcing all Q outputs low.

All inputs are equipped with protection circuits

against static discharge and transient excess volt-

age.

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