74ACT299

8 BIT PIPO SHIFT REGISTER

WITH ASYNCHRONOUS CLEAR

PRELIMINARY DATA

April 1999

s

HIGH SPEED:

s

LOW POWER DISSIPATION:

s

COMPATIBLE WITH TTL OUTPUTS

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 ACT299 is an high-speed CMOS 8-BIT PIPO

SHIFT REGISTERS (3-STATE) fabricated with

sub-micron silicon gate and double-layer metal

wiring C

power

applications

mantaining

high

speed

operation similar to equivalent Bipolar Schottky

TTL.

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 synchronous to clock.

The device is designed to interface directly High

Speed CMOS systems with TTL, NMOS and

CMOS output voltage levels.

All inputs

and

outputs are

equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

M

(Micro Package)

B

(Plastic Package)

ORDER CODES :

74ACT299B

74ACT299M

®

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