54ACQ244 • 54ACTQ244
Quiet Series Octal Buffer/Line Driver with TRI-STATE
®
Outputs
General Description
The ’ACQ/’ACTQ244 is an octal buffer and line driver de-
signed to be employed as a memory address driver, clock
driver and bus oriented transmitter or receiver which pro-
vides improved PC board density. 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 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/’ACT244
n 4 kV minimum ESD immunity
n Standard Microcircuit Drawing (SMD)
— ’ACTQ244: 5962-92186
— ’ACQ244: 5962-92176
Logic Symbol
Pin Names Description
OE
1
,OE
2
TRI-STATE Output Enable Inputs
I
0
–I
7
Inputs
O
0
–O
7
Outputs
Connection Diagrams
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.
IEE/IEC
DS100236-1
Pin Assignment
for DIP and Flatpak
DS100236-2
Pin Assignment
for LCC
DS100236-3
August 1998
54ACQ244
•
54ACTQ244
Quiet
Series
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100236 www.national.com