74ACT299
8 BIT PIPO SHIFT REGISTER
WITH ASYNCHRONOUS CLEAR
PRELIMINARY DATA
April 1999
n HIGH SPEED:
f
MAX
= 170 MHz (TYP.) at V
CC
=5V
n LOW POWER DISSIPATION:
ICC =8 µA (MAX.) at TA =25
o
C
n COMPATIBLEWITH TTL OUTPUTS
VIH =2V(MIN),VIL = 0.8V(MAX)
n 50Ω TRANSMISSIONLINE DRIVING
CAPABILITY
n SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|=IOL = 24 mA (MIN)
n BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
n OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 4.5V to 5.5V
n PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 299
n 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
2
MOS technology. It is ideal for low
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 synchronousto 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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