54ACQ373 • 54ACTQ373
Quiet Series Octal Transparent Latch with TRI-STATE
®
Outputs
General Description
The ’ACQ/’ACTQ373 consists of eight latches with
TRI-STATE outputs for bus organized system applications.
The latches appear transparent to the data when Latch En-
able (LE) is HIGH. When LE is low, the data satisfying the in-
put timing requirements is latched. Data appears on the bus
when the Output Enable (OE) is LOW. When OE is HIGH,
the bus output is in the high impedance state.
The ’ACQ/’ACTQ373 utilizes NSC Quiet Series technology
to guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet Series™ features
GTO™ output control and undershoot corrector in addition to
a split ground bus for superior performance.
Features
n I
CC
and I
OZ
reduced by 50%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Improved latch up immunity
n Eight latches in a single package
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ’AC/’ACT373
n 4 kV minimum ESD immunity (’ACQ)
n Standard Military Drawing (SMD)
— ’ACTQ373: 5962-92188
— ’ACQ373: 5962-92178
Logic Symbols
Pin Names Description
D
0
–D
7
Data Inputs
LE Latch Enable Input
OE Output Enable Input
O
0
–O
7
TRI-STATE Latch Outputs
GTO™ is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series™ is a trademark of Fairchild Semiconductor Corporation.
DS100238-1
IEEE/IEC
DS100238-2
September 1998
54ACQQ373
•
54ACTQ373
Quiet
Series
Octal
T
ransparent
Latch
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100238 www.national.com