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
TM
features GTO
TM
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
TM
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
TM
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
Truth Tables
Inputs
Outputs
OE
1
I
n
(Pins 12, 14, 16, 18)
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
L
L
L
L
H
H
H
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
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2
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
Supply Voltage (V
CC
)
'ACQ
2.0V to 6.0V
'ACTQ
4.5V to 5.5V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
)
54ACQ/ACTQ
-55C to +125C
Minimum Input Edge Rate
V/
t
'ACQ Devices
V
IN
from 30% to 70% of V
CC
V
CC
@
3.0V, 4.5V, 5.5V
125 mV/ns
Minimum Input Edge Rate
V/
t
'ACTQ Devices
V
IN
from 0.8V to 2.0V
V
CC
@
4.5V, 5.5V
125 mV/ns
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT
circuits outside databook specifications.
Note 2: All commercial packaging is not recommended for applications re-
quiring greater than 2000 temperature cycles from -40C to +125C.
DC Electrical Characteristics for 'ACQ Family Devices
54ACQ
Symbol
Parameter
V
CC
T
A
= -55C to
+125C
Units
Conditions
(V)
Guaranteed Limits
V
IH
Minimum High Level
3.0
2.1
V
OUT
= 0.1V
Input Voltage
4.5
3.15
V
or V
CC
- 0.1V
5.5
3.85
V
IL
Maximum Low Level
3.0
0.9
V
OUT
= 0.1V
Input Voltage
4.5
1.35
V
or V
CC
- 0.1V
5.5
1.65
V
OH
Minimum High Level
3.0
2.9
I
OUT
= -50 A
Output Voltage
4.5
4.4
V
5.5
5.4
(Note 3)
V
IN
= V
IL
or V
IH
3.0
2.4
I
OH
= -12 mA
4.5
3.7
V
I
OH
= -24 mA
5.5
4.7
I
OH
= -24 mA
V
OL
Maximum Low Level
3.0
0.1
I
OUT
= 50 A
Output Voltage
4.5
0.1
V
5.5
0.1
(Note 3)
V
IN
= V
IL
or V
IH
3.0
0.50
I
OL
= 12 mA
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
(Note 5)
3
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DC Electrical Characteristics for 'ACQ Family Devices
(Continued)
54ACQ
Symbol
Parameter
V
CC
T
A
= -55C to
+125C
Units
Conditions
(V)
Guaranteed Limits
I
OLD
Minimum Dynamic
(Note 4)
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
Output Current
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
80.0
A
V
IN
= V
CC
Supply Current
or GND (Note 5)
I
OZ
Maximum TRI-STATE
V
I
(OE) = V
IL
, V
IH
Leakage Current
5.5
5.0
A
V
I
= V
CC
, GND
V
O
= V
CC
, GND
V
OLP
Quiet Output
5.0
1.5
V
(Notes 6, 7)
Maximum Dynamic V
OL
V
OLV
Quiet Output
5.0
-1.2
V
(Notes 6, 7)
Minimum Dynamic V
OL
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: I
IN
and I
CC
@
3.0V are guaranteed to be less than or equal to the respective limit
@
5.5V V
CC
.
I
CC
for 54ACQ
@
25C is identical to 74ACQ
@
25C.
Note 6: Plastic DIP package.
Note 7: Max number of outputs defined as (n). Data Inputs are driven 0V to 5V. One output
@
GND.
Note 8: Max number of Data Inputs (n) switching. (n - 1) Inputs switching 0V to 5V ('ACQ). Input-under-test switching: 5V to threshold (V
ILD
), 0V to threshold (V
IHD
),
f = 1 MHz.
DC Electrical Characteristics for 'ACTQ Family Devices
54ACTQ
Symbol
Parameter
V
CC
-55C to +125C
Units
Conditions
(V)
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 9)
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 9)
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
Maximum TRI-STATE
5.5
5.0
A
V
I
= V
IL
, V
IH
Leakage Current
V
O
= V
CC
, GND
I
CCT
Maximum I
CC
/Input
5.5
1.6
mA
V
I
= V
CC
- 2.1V
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4
DC Electrical Characteristics for 'ACTQ Family Devices
(Continued)
54ACTQ
Symbol
Parameter
V
CC
-55C to +125C
Units
Conditions
(V)
Guaranteed Limits
I
OLD
Minimum Dynamic
(Note 10)
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
Output Current
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
80.0
A
V
IN
= V
CC
Supply Current
or GND (Note 11)
V
OLP
Quiet Output
5.0
1.5
V
(Notes 12, 13)
Maximum Dynamic V
OL
V
OLV
Quiet Output
5.0
-1.2
V
(Notes 12, 13)
Minimum Dynamic V
OL
Note 9: All outputs loaded thresholds on input associated with output under test.
Note 10: Maximum test duration 2.0 ms, one output loaded at a time.
Note 11: I
CC
for 54ACTQ
@
25C is identical to 74ACTQ
@
25C.
Note 12: Plastic DIP package.
Note 13: Max number of outputs defined as (n). Data Inputs are driven 0V to 3V. One output
@
GND.
AC Electrical Characteristics
54ACQ
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 14)
C
L
= 50 pF
Min
Max
t
PHL,
t
PLH
Propagation Delay
3.3
1.0
12.5
ns
Data to Output
5.0
1.0
9.0
t
PZL,
t
PZH
Output Enable Time
3.3
1.0
12.0
ns
5.0
1.0
10.0
t
PHZ,
t
PLZ
Output Disable Time
3.3
1.0
11.5
ns
5.0
1.0
10.0
Note 14: Voltage Range 5.0 is 5.0V
0.5V.
Voltage Range 3.3 is 3.3V
0.3V.
Note 15: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The speci-
fication applies to any outputs switching in the same direction, either HIGH to LOW (t
OSHL
) or LOW to HIGH (t
OSLH
). Parameter guaranteed by design.
AC Electrical Characteristics
54ACTQ
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 16)
C
L
= 50 pF
Min
Max
t
PHL
, t
PLH
Propagation Delay
5.0
1.5
9.0
ns
Data to Output
t
PZL
, t
PZH
Output Enable Time
5.0
1.5
10.5
ns
t
PHZ
, t
PLZ
Output Disable Time
5.0
1.5
10.5
ns
Note 16: Voltage Range 5.0 is 5.0V
0.5V.
Note 17: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The speci-
fication applies to any outputs switching in the same direction, either HIGH to LOW (t
OSHL
) or LOW to HIGH (t
OSLH
). Parameter guaranteed by design.
5
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