54AC151
•
54ACT151 8-Input Multiplexer
August 1998
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.
Features
n
n
n
n
I
CC
reduced by 50%
Outputs source/sink 24 mA
’ACT151 has TTL-compatible inputs
Standard Microcircuit Drawing (SMD)
— ’AC151: 5962-87691
— ’ACT151: 5962-88756
Ordering Code:
Logic Symbols
IEEE/IEC
DS100270-1
DS100270-6
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.
© 1998 National Semiconductor Corporation
DS100270
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Connection Diagrams
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
DS100270-2
DS100270-3
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
Z
H
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Outputs
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 se-
lect from eight sources of data or control information. By
proper manipulation of the inputs, the ’AC/’ACT151 can pro-
vide any logic function of four variables and its complement.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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2
Logic Diagram
DS100270-4
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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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
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
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
I
OLD
I
OHD
Maximum Input
Leakage Current
Minimum Dynamic
Output Current (Note 3)
5.5
5.5
5.5
0.50
0.50
0.50
V
µA
mA
mA
(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
V
OLD
= 1.65V Max
V
OHD
= 3.85V Min
±
1.0
50
−50
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4
DC Characteristics for ’AC Family Devices
Symbol
I
CC
Parameter
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
V
CC
(V)
5.5
T
A
= −55˚C to +125˚C
Guaranteed Limits
80.0
µA
V
IN
= V
CC
or GND
Units
Conditions
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
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
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
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.
0.50
0.50
V
µA
mA
mA
mA
µA
5.5
5.5
5.5
5.5
5.5
±
1.0
1.6
50
−50
80.0
AC Electrical Characteristics
54AC
Symbol
Parameter
V
CC
(V)
(Note 8)
t
PLH
Propagation Delay
S
n
to Z or Z
3.3
5.0
T
A
= −55˚C to +125˚C
C
L
= 50 pF
Min
1.0
1.0
Max
22.0
15.5
ns
Units
Fig.
No.
5
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