54ACQ240
54ACTQ240
Quiet Series Octal Buffer/Line Driver with TRI-STATE
Outputs
General Description
The 'ACQ/'ACTQ240 is an inverting octal buffer and line
driver designed to be employed as a memory address driver,
clock driver and bus oriented transmitter or receiver which
provides improved PC board density. The 'ACQ/'ACTQ uti-
lizes NSC Quiet Series technology to guarantee quiet output
switching and improve 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
Inverting TRI-STATE outputs drive bus lines or buffer
memory address registers
n
Outputs source/sink 24 mA
n
Faster prop delays than the standard 'ACT240
n
4 kV minimum ESD immunity
n
Standard Microcircuit Drawing (SMD)
'ACTQ240: 5962-92184
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.
IEEE/IEC
DS100235-1
Pin Assignment
for DIP and Flatpak
DS100235-2
Pin Assignment
for LCC
DS100235-3
February 1999
54ACQ240
54ACTQ240
Quiet
Series
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100235
www.national.com
Truth Tables
Inputs
Outputs
OE
1
I
n
(Pins 12, 14, 16, 18)
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
L
L
H
L
H
L
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 Characteristics for 'ACQ Family Devices
54ACQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
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)
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3
DC Characteristics for 'ACQ Family Devices
(Continued)
54ACQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
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
Maximum Dynamic V
OL
5.0
1.5V
V
(Notes 6, 7)
V
OLV
Quiet Output
Minimum Dynamic V
OL
5.0
-1.2V
V
(Notes 6, 7)
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 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 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
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4
DC Characteristics for 'ACTQ Family Devices
(Continued)
54ACTQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
I
CCT
Maximum
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
CC
/Input
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 Maximum
Dynamic V
OL
5.0
1.5V
V
(Notes 12, 13)
V
OLV
Quiet Output Minimum
Dynamic V
OL
5.0
-1.2V
V
(Notes 12, 13)
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 Data Inputs defined as (n). n-1 Data Inputs are driven 0V to 3V. One Data Input
@
V
IN
= GND.
Note 14: Max number of Data Inputs (n) switching. (n-1) Inputs switching 0V to 3V ('ACTQ). Input-under-test switching: 3V to threshold (V
ILD
), 0V to threshold
(V
IHD
), f = 1 MHz.
AC Electrical Characteristics
54ACQ
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 15)
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
13.5
ns
5.0
1.0
10.0
t
PHZ
, t
PLZ
Output Disable Time
3.3
1.0
11.0
ns
5.0
1.0
9.0
Note 15: Voltage Range 5.0 is 5.0V
0.5V
Voltage Range 3.3 is 3.3
0.3V.
Note 16: 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.
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5
AC Electrical Characteristics
54ACTQ
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 17)
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
11.0
ns
t
PHZ
, t
PLZ
Output Disable Time
5.0
1.5
10.0
ns
Note 17: Voltage Range 5.0 is 5.0V
0.5V
Note 18: 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.
Capacitance
Symbol
Parameter
Typ
Units
Conditions
C
IN
Input Capacitance
4.5
pF
V
CC
= OPEN
C
PD
Power Dissipation
70
pF
V
CC
= 5.0V
Capacitance
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6
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
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7
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
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20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54ACQ240
54ACTQ240
Quiet
Series
Octal
Buffer/Line
Driver
with
TRI-ST
A
T
E
Outputs
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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