54ACQ573 • 54ACTQ573
Quiet Series Octal Latch with TRI-STATE
®
Outputs
General Description
The ’ACQ/’ACTQ573 is a high-speed octal latch with buff-
ered common Latch Enable (LE) and buffered common Out-
put Enable (OE) inputs. The ’ACQ/’ACTQ573 is functionally
identical to the ’ACQ/’ACTQ373 but with inputs and outputs
on opposite sides of the package. The ’ACQ/’ACTQ utilizes
NSC Quiet Series technology to guarantee quiet output
switching and improved dynamic threshold performance.
FACT Quiet Series™ features GTO™ output control and un-
dershoot corrector in addition to a split ground bus for supe-
rior 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 Inputs and outputs on opposite sides of package allow
easy interface with microprocessors
n Outputs source/sink 24 mA
n Faster prop delays than standard ’ACT573
n 4 kV minimum ESD immunity
n Standard Microcircuit Drawing (SMD)
— ’ACTQ573: 5962-92194
— ’ACQ573: 5962-92180
Logic Symbols
Pin Names Description
D
0
–D
7
Data Inputs
LE Latch Enable Input
OE TRI-STATE 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.
DS100242-1
IEEE/IEC
DS100242-2
August 1998
54ACQ573
•
54ACTQ573
Quiet
Series
Octal
Latch
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100242 www.national.com