54AC151/54ACT151 8-Input Multiplexer
July 2003
54AC151/54ACT151
8-Input Multiplexer
General Description
The ’AC/’ACT151 is a high-speed 8-input digital multiplexer.
It provides, in one package, the ability to select one line of
data from up to eight sources. The ’AC/’ACT151 can be used
as a universal function generator to generate any logic func-
tion of four variables. Both true and complementary outputs
are provided.
n
’ACT151 has TTL-compatible inputs
n
Standard Microcircuit Drawing (SMD)
— ’AC151: 5962-87691
— ’ACT151: 5962-88756
n
54AC151 now qualified to 300Krad RHA designation,
refer to the SMD for more information
Features
n
I
CC
reduced by 50%
n
Outputs source/sink 24 mA
Logic Symbols
IEEE/IEC
10027001
10027006
Pin Names
I
0
–I
7
S
0
–S
2
E
Z
Z
Description
Data Inputs
Select Inputs
Enable Input
Data Output
Inverted Data Output
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
© 2003 National Semiconductor Corporation
DS100270
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54AC151/54ACT151
Connection Diagrams
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
10027002
10027003
Truth Table
Inputs
E
H
L
L
L
L
L
L
L
L
S
2
X
L
L
L
L
H
H
H
H
S
1
X
L
L
H
H
L
L
H
H
S
0
X
L
H
L
H
L
H
L
H
Outputs
Z
H
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Z
L
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Functional Description
The ’AC/’ACT151 is a logic implementation of a single pole,
8-position switch with the switch position controlled by the
state of three Select inputs, S
0
, S
1
, S
2
. Both true and
complementary outputs are provided. The Enable input (E) is
active LOW. When it is not activated, the complementary
output is HIGH and the true output is LOW regardless of all
other inputs. The logic function provided at the output is:
Z = E
•
(I
0
•
S
0
•
S
1
•
S
2
+ I
1
•
S
0
•
S
1
•
S
2
+
I
2
•
S
0
•
S
1
•
S
2
+ I
3
•
S
0
•
S
1
•
S
2
+ I
4
•
S
0
•
S
1
•
S
2
+
I
5
•
S
0
•
S
1
•
S
2
+ I
6
•
S
0
•
S
1
•
S
2
+ I
7
•
S
0
•
S
1
•
S
2
)
The ’AC/’ACT151 provides the ability, in one package to
select from eight sources of data or control information. By
proper manipulation of the inputs, the ’AC/’ACT151 can
provide any logic function of four variables and its comple-
ment.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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2
54AC151/54ACT151
Logic Diagram
10027004
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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54AC151/54ACT151
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
175˚C
−20 mA
+20 mA
−0.5V to V
CC
+
0.5V
−20 mA
+20 mA
−0.5V to V
CC
+
0.5V
−0.5V to +7.0V
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
125 mV/ns
125 mV/ns
−55˚C to +125˚C
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
±
50 mA
±
50 mA
−65˚C to +150˚C
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
54AC
Symbol
V
IH
Parameter
Minimum High Level
Input Voltage
V
IL
Maximum Low Level
Input Voltage
V
OH
Minimum High Level
Output Voltage
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
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
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
(Note 2)
V
IN
= V
IL
or V
IH
3.0
4.5
5.5
I
IN
Maximum Input
Leakage Current
5.5
0.50
0.50
0.50
V
µA
I
OL
= 12 mA
I
OL
= 24 mA
I
OL
= 24 mA
V
I
= V
CC
, GND
V
V
I
OH
= −12 mA
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
±
1.0
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4
54AC151/54ACT151
DC Characteristics for ’AC Family Devices
54AC
Symbol
I
OLD
I
OHD
I
CC
Parameter
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)
V
CC
(V)
5.5
5.5
5.5
T
A
= −55˚C to +125˚C
Guaranteed Limits
50
−50
80.0
Units
mA
mA
µA
Conditions
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
54ACT
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
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
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
4.5
5.5
3.70
4.70
0.1
0.1
(Note 5)
V
IN
= V
IL
or V
IH
4.5
5.5
I
IN
I
CCT
I
OLD
I
OHD
I
CC
Maximum Input
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.
Units
V
V
V
Conditions
V
OUT
= 0.1V
or V
CC
− 0.1V
V
OUT
= 0.1V
or V
CC
− 0.1V
I
OUT
= −50 µA
V
V
I
OH
= −24 mA
I
OH
= −24 mA
I
OUT
= 50 µA
0.50
0.50
V
µA
mA
mA
mA
µA
I
OL
= 24 mA
I
OL
= 24 mA
V
I
= 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
5.5
5.5
5.5
5.5
5.5
±
1.0
1.6
50
−50
80.0
5
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