54ACTQ541
Quiet Series Octal Buffer/Line Driver with TRI-STATE
®
Outputs
General Description
The ’ACTQ541 is an octal buffer and line driver with
TRI-STATE outputs designed to be employed as a memory
and address driver, clock driver, or bus-oriented transmitter/
receiver.
The ’ACTQ541 is similar to the ’ACTQ244 while providing
flow-through architecture (inputs on opposite sides from out-
puts). This pinout arrangement makes this device especially
useful as an output port for microprocessors, allowing ease
of layout and greater PC board density.
The ’ACTQ541 utilizes NSC Quiet Series technology to
guarantee quiet output switching and improved dynamic
threshold performance. FACT Quiet Series™ features
GTO™ output control and undershoot corrector in addition to
a split ground bus for superior ACMOS performance.
Features
n Non-inverting buffers
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Flow-through pinout for ease of PC board layout
n Non-inverting TRI-STATE™ outputs
n TTL compatible inputs
n CMOS power consumption
n Output source/sink 24 mA
n Standard Microcircuit Drawing (SMD) 5962-9682901
Connection Diagram
Pin Names Description
OE
1
,OE
2
Output Enable Input (Active Low)
I
0
–I
7
Inputs
O
0
–O
7
Outputs
Truth Table
Inputs Outputs
OE
1
OE
2
I ACTQ541
LLH H
HXX Z
XH
LLL L
H=HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
GTO™ is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT™ and FACT Quiet Series™ are trademarks of Fairchild Semiconductor Corporation.
Pin Assignment
DIP and Cerpack
DS100983-1
Pin Assignment
LCC
DS100983-30
September 1998
54ACTQ541
Quiet
Series
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100983 www.national.com