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
TM
features
GTO
TM
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
TM
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
L
L
H
H
H
X
X
Z
X
H
X
Z
L
L
L
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
GTO
TM
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
TM
and FACT Quiet Series
TM
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
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
DC Latch-Up
Source or Sink Current
300 mA
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
-55C to +125C
Supply Voltage
Military
+4.5V to +5.5V
Minimum Input Edge Rate
(
V/
t)
'ACTQ Devices
125 mV/ns
V
IN
from 0.8 to 2.0V
V
CC
4.5V, 5.5V
Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under these
conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics for 'ACTQ Family Devices
54ACTQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed Limits
V
IH
Minimum High Level
4.5
2.0
V
V
OUT
= 0.1V
Input Voltage
5.5
2.0
or V
CC
- 0.1V
V
IL
Maximum Low Level
4.5
0.8
V
V
OUT
= 0.1V
Input Voltage
5.5
0.8
or V
CC
- 0.1V
V
OH
Minimum High Level
4.5
4.4
V
I
OUT
= -50 A
Output Voltage
5.5
5.4
(Note 3)
V
IN
= V
IL
or V
IH
4.5
3.70
V
I
OH
= -24 mA
5.5
4.70
I
OH
= -24 mA
V
OL
Maximum Low Level
4.5
0.1
V
I
OUT
= 50 A
Output Voltage
5.5
0.1
(Note 3)
V
IN
= V
IL
or V
IH
4.5
0.50
V
I
OL
= 24 mA
5.5
0.50
I
OL
= 24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
OZ
TRI-STATE Output Leakage
Current, High or Low
5.5
10.0
A
OE = 2.0V
I
CCT
Maximum
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
CC
/Input
I
OLD
Minimum Dynamic
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
Output Current (Note 4)
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
160.0
A
V
IN
= V
CC
Supply Current
or GND (Note 4)
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2
DC Electrical Characteristics for 'ACTQ Family Devices
(Continued)
54ACTQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed Limits
V
OLP
Quiet Output Maximum
5.0
1.5
V
Dynamic V
OL
(Note 4)
V
OLV
Quiet Output Minimum
5.0
-1.2
V
Dynamic V
OL
(Note 5)
Note 3: All outputs loaded; thresholds on input associated with output under test.
Note 4: Maximum test duration 2.0 ms, one output loaded at a time.
Note 5: Max number of outputs defined as (n). Data inputs are 0V to 3V. One output
@
GND.
AC Electrical Characteristics
54ACTQ
T
A
= -55C to +125C
Fig.
Symbol
Parameter
V
CC
= 4.5V5.5V
Units
No.
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
2.0
9.0
ns
t
PHL
Data to Outputs
2.0
9.0
t
PZH
Output Enable Time
1.5
9.5
ns
t
PZL
1.5
11.5
t
PHZ
Output Disable Time
1.5
9.5
ns
t
PLZ
1.5
9.5
Capacitance
Symbol
Parameter
Max
Units
Conditions
T
A
= 25C
C
IN
Input Capacitance
12.0
pF
V
CC
= 0.0V
C
OUT
(Note 6)
Output Capacitance
15.0
pF
V
CC
= 5.0V
Note 6: C
OUT
is measured at frequency of f = 1 MHz, per MIL-STD-883B, Method 3012.
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3
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Chip Carrier
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package
NS Package Number J20A
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5
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