1/13

June 2003

s

HIGH SPEED :

s

LOW POWER DISSIPATION:

s

HIGH NOISE IMMUNITY:

s

SYMMETRICAL OUTPUT IMPEDANCE:

s

BALANCED PROPAGATION DELAYS:

s

WIDE OPERATING VOLTAGE RANGE:

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 164

DESCRIPTION

The M74HC164 is an high speed CMOS 8 BIT

SIPO SHIFT REGISTER fabricated with silicon

The M74HC164 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 connected together. Each low-to-high

transition on the clock inputs shifts data one place

to the right and enters into QA the logic NAND of

the two data inputs (A x 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

voltage.

M74HC164

8 BIT SIPO SHIFT REGISTER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

M74HC164B1R

SOP

M74HC164M1R

M74HC164RM13TR

TSSOP

M74HC164TTR

TSSOP

DIP

SOP