1/13

April 2001

s

HIGH SPEED:

s

s

LOW POWER DISSIPATION:

s

HIGH NOISE IMMUNITY:

s

50

Ω TRANSMISSION LINE DRIVING

CAPABILITY

s

SYMMETRICAL OUTPUT IMPEDANCE:

s

BALANCED PROPAGATION DELAYS:

s

OPERATING VOLTAGE RANGE:

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 299

s

IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74AC299 is an advanced high-speed CMOS

8-BIT PIPO

SHIFT REGISTER (3-STATE)

fabricated

with

sub-micron silicon gate and

These devices have four modes (HOLD, SHIFT

LEFT, SHIFT RIGHT and LOAD DATA). Each

mode is chosen by two function select inputs (S0,

S1) as shown in the Truth Table. 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 is

asynchronous to clock.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74AC299

8 BIT PIPO SHIFT REGISTER

WITH ASYNCHRONOUS CLEAR

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

74AC299B

SOP

74AC299M

74AC299MTR

TSSOP

74AC299TTR

TSSOP

DIP

SOP