1/13

July 2001

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 299

DESCRIPTION

The M74HC299 is an high speed CMOS 8 BIT

PIPO SHIFT REGISTER (3-STATE) fabricated

This device has four modes (HOLD, SHIFT LEFT,

SHIFT RIGHT and LOAD DATA). Each mode is

chosen by two function select inputs (S0, S1).

When one or both enable inputs, (G1, G2) are

high, the eight input/output terminals are in the

high

impedance

state;

however

sequential

operation or clearing of the register is not affected.

Clear function on the M74HC299 is asynchronous

to CLOCK.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

M74HC299

8 BIT PIPO SHIFT REGISTER

WITH ASYNCHRONOUS CLEAR

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

M74HC299B1R

SOP

M74HC299M1R

M74HC299RM13TR

TSSOP

M74HC299TTR

TSSOP

DIP

SOP