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National Semiconductor Electronic Components Datasheet

54ACQ244 Datasheet

Quiet Series Octal Buffer/Line Driver

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August 1998
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 Seriesfeatures GTOoutput control and un-
dershoot corrector in addition to a split ground bus for supe-
rior performance.
Features
n ICC and IOZ 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
Connection Diagrams
IEE/IEC
Pin Assignment
for DIP and Flatpak
Pin Names
OE1, OE2
I0–I 7
O0–O 7
DS100236-1
Description
TRI-STATE Output Enable Inputs
Inputs
Outputs
GTOis 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 Seriesis a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100236
DS100236-2
Pin Assignment
for LCC
DS100236-3
www.national.com


National Semiconductor Electronic Components Datasheet

54ACQ244 Datasheet

Quiet Series Octal Buffer/Line Driver

No Preview Available !

Truth Tables
Inputs
OE1
L
L
H
In
L
H
X
Inputs
OE2
L
In
L
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Outputs
(Pins 12, 14, 16, 18)
L
H
Z
Outputs
(Pins 3, 5, 7, 9)
L
H
Z
www.national.com
2


Part Number 54ACQ244
Description Quiet Series Octal Buffer/Line Driver
Maker National Semiconductor
Total Page 8 Pages
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