54AC241
•
54ACT241 Octal Buffer/Line Driver with TRI-STATE Outputs
August 1998
54AC241
•
54ACT241
Octal Buffer/Line Driver with TRI-STATE
®
Outputs
General Description
The ’AC/’ACT241 is an 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.
n
Non-inverting TRI-STATE outputs drive bus lines or
buffer memory address registers
n
Outputs source/sink 24 mA
n
’ACT241 has TTL-compatible inputs
n
Standard Microcircuit Drawing (SMD)
— ’AC241: 5962-87551
— ’ACT241: 5962-89847
Features
n
I
CC
and I
OZ
reduced by 50%
Logic Symbol
Connection Diagrams
Pin Assignment
for DIP and Flatpak
DS100281-1
DS100281-2
Pin
Names
OE
1
,
OE
2
I
0
–I
7
O
0
–O
7
Description
TRI-STATE Output Enable Input
TRI-STATE Output Enable Input (Active
HIGH)
Inputs
Outputs
Pin Assignment
for LCC
DS100281-3
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100281
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Truth Tables
Inputs
OE
1
L
L
H
Inputs
OE
2
H
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Outputs
I
n
L
H
X
(Pins 12, 14, 16, 18)
L
H
Z
Outputs
I
n
L
H
X
(Pins 3, 5, 7, 9)
L
H
Z
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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
)
DC Input Diode Current (I
IK
)
V
I
= −0.5V
V
I
= V
CC
+ 0.5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
= −0.5V
V
O
= V
CC
+ 0.5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
Junction Temperature (T
J
)
CDIP
−0.5V to +7.0V
−20 mA
+20 mA
−0.5V to V
CC
+ 0.5V
−20 mA
+20 mA
−0.5V to V
CC
+ 0.5V
Recommended Operating
Conditions
Supply Voltage (V
CC
)
’AC
’ACT
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
54AC/ACT
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
@
3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
’ACT Devices
V
IN
from 0.8V to 2.0V
V
CC
@
4.5V, 5.5V
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
−55˚C to +125˚C
125 mV/ns
±
50 mA
±
50 mA
−65˚C to +150˚C
175˚C
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.
DC Characteristics for ’AC Family Devices
Symbol
Parameter
V
CC
(V)
V
IH
Minimum High Level
Input Voltage
V
IL
Maximum Low Level
Input Voltage
V
OH
Minimum High Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
54AC
T
A
=
−55˚C to +125˚C
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
(Note 2)
V
IN
= V
IL
or V
IH
I
OH
= −12 mA
V
I
OH
= −24 mA
I
OH
= −24 mA
I
OUT
= 50 µA
V
I
OUT
= −50 µA
V
V
OUT
= 0.1V
or V
CC
− 0.1V
V
V
OUT
= 0.1V
or V
CC
− 0.1V
Units
Conditions
3.0
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
2.4
3.7
4.7
0.1
0.1
0.1
V
3.0
4.5
5.5
I
IN
Maximum Input
Leakage Current
5.5
0.50
0.50
0.50
V
µA
(Note 2)
V
IN
= V
IL
or V
IH
I
OL
= 12 mA
I
OL
= 24 mA
I
OL
= 24 mA
V
I
= V
CC
, GND
±
1.0
3
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DC Characteristics for ’AC Family Devices
Symbol
Parameter
V
CC
(V)
I
OZ
Maximum TRI-STATE
Leakage Current
I
OLD
I
OHD
I
CC
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent
Supply Current
Note 2:
All outputs loaded; thresholds on input associated with output under test.
Note 3:
Maximum test duration 2.0 ms, one output loaded at a time.
(Continued)
54AC
T
A
=
−55˚C to +125˚C
Guaranteed Limits
Units
Conditions
5.5
5.5
5.5
5.5
±
5.0
50
−50
80.0
µA
mA
mA
µA
V
I
(OE) = V
IL
, V
IH
V
I
= V
CC
, GND
V
O
= V
CC
, GND
V
OLD
= 1.65V Max
V
OHD
= 3.85V Min
V
IN
= V
CC
or GND
Note 4:
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 54AC
@
25˚C is identical to 74AC
@
25˚C.
DC Characteristics for ’ACT Family Devices
Symbol
Parameter
V
CC
(V)
V
IH
V
IL
V
OH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
4.5
5.5
4.5
5.5
4.5
5.5
54ACT
T
A
=
−55˚C to +125˚C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
(Note 5)
V
IN
= V
IL
or V
IH
I
OH
= −24 mA
I
OH
= −24 mA
I
OUT
= 50 µA
(Note 5)
V
IN
= V
IL
or V
IH
I
OL
= 24 mA
I
OL
= 24 mA
V
I
= V
CC
, GND
V
I
= V
IL
, V
IH
V
O
= V
CC
, GND
V
I
= V
CC
− 2.1V
V
OLD
= 1.65V Max
V
OHD
= 3.85V Min
V
IN
= V
CC
or GND
V
V
V
V
OUT
= 0.1V
or V
CC
− 0.1V
V
OUT
= 0.1V
or V
CC
− 0.1V
I
OUT
= −50 µA
Units
Conditions
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
4.5
5.5
3.70
4.70
0.1
0.1
V
V
4.5
5.5
I
IN
I
OZ
I
CCT
I
OLD
I
OHD
I
CC
Maximum Input
Leakage Current
Maximum TRI-STATE
Leakage Current
Maximum
I
CC
/Input
Minimum Dynamic
Output Current (Note 6)
Maximum Quiescent
Supply Current
Note 5:
All outputs loaded; thresholds on input associated with output under test.
Note 6:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 7:
I
CC
for 54ACT
@
25˚C is identical to 74ACT
@
25˚C.
0.50
0.50
V
µA
µA
mA
mA
mA
µA
5.5
5.5
5.5
5.5
5.5
5.5
±
1.0
±
5.0
1.6
50
−50
80.0
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4
AC Electrical Characteristics
V
CC
Symbol
Parameter
(V)
(Note 8)
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
Data to Output
Propagation Delay
Data to Output
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
Note 8:
Voltage Range 3.3 is 3.3V
±
3.3V
Voltage Range 5.0 is 5.0V
±
0.5V
54AC
T
A
= −55˚C
to +125˚C
C
L
= 50 pF
Max
12.0
9.5
11.5
9.0
13.0
10.0
13.0
10.0
13.0
11.5
13.0
11.5
ns
ns
ns
ns
ns
ns
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Units
AC Electrical Characteristics
V
CC
Symbol
Parameter
(V)
(Note 9)
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
Data to Output
Propagation Delay
Data to Output
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
5.0
5.0
5.0
5.0
1.0
1.0
1.0
1.0
11.5
12.5
12.5
12.5
ns
ns
ns
ns
5.0
1.0
10.0
ns
5.0
1.0
54ACT
T
A
= −55˚C
to +125˚C
C
L
= 50 pF
Max
10.0
ns
Units
Note 9:
Voltage Range 5.0 is 5.0V
±
0.5V
Capacitance
Symbol
C
IN
C
PD
Parameter
Input Capacitance
Power Dissipation
Capacitance
Typ
4.5
45.0
Units
pF
pF
Conditions
V
CC
= OPEN
V
CC
= 5.0V
5
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