54AC153
54ACT153
Dual 4-Input Multiplexer
General Description
The 'AC/'ACT153 is a high-speed dual 4-input multiplexer
with common select inputs and individual enable inputs for
each section. It can select two lines of data from four
sources. The two buffered outputs present data in the true
(non-inverted) form. In addition to multiplexer operation, the
'AC/'ACT153 can act as a function generator and generate
any two functions of three variables.
Features
n
I
CC
reduced by 50%
n
Outputs source/sink 24 mA
n
'ACT153 has TTL-compatible inputs
n
Standard Microcircuit Drawings (SMD)
-- 'AC153: 5962-87625
-- 'ACT153: 5962-87698
Logic Symbols
Pin
Names
Description
I
0a
I
3a
Side A Data Inputs
I
0b
I
3b
Side B Data Inputs
S
0
, S
1
Common Select
Inputs
E
a
Side A Enable Input
E
b
Side B Enable Input
Z
a
Side A Output
Z
b
Side B Output
FACT
is a registered trademark of Fairchild Semiconductor Corporation.
DS100271-1
IEEE/IEC
DS100271-2
September 1998
54AC153
54ACT153
Dual
4-Input
Multiplexer
1998 National Semiconductor Corporation
DS100271
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Connection Diagrams
Functional Description
The 'AC/'ACT153 is a dual 4-input multiplexer. It can select
two bits of data from up to four sources under the control of
the common Select inputs (S
0
, S
1
). The two 4-input multi-
plexer circuits have individual active-LOW Enables (E
a
, E
b
)
which can be used to strobe the outputs indepedently. When
the Enables (E
a
, E
b
) are HIGH, the corresponding outputs
Z
a
, Z
b
) are forced LOW. The 'AC/'ACT153 is the logic imple-
mentation of a 2-pole, 4-position switch, where the position
of the switch is determined by the logic levels supplied to the
Select inputs. The logic equations for the outputs are shown
below.
Z
a
= E
a
(I
0a
S
1
S
0
+ I
1a
S
1
S
0
+
I
2a
S
1
S
0
+ I
3a
S
1
S
0
)
Z
b
= E
b
(I
0b
S
1
S
0
+ I
1b
S
1
S
0
+
I
2b
S
1
S
0
+ I
3b
S
1
S
0
)
Truth Table
Select
Inputs (a or b)
Output
Inputs
S
0
S
1
E
I
0
I
1
I
2
I
3
Z
X
X
H
X
X
X
X
L
L
L
L
L
X
X
X
L
L
L
L
H
X
X
X
H
H
L
L
X
L
X
X
L
H
L
L
X
H
X
X
H
L
H
L
X
X
L
X
L
L
H
L
X
X
H
X
H
H
H
L
X
X
X
L
L
H
H
L
X
X
X
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Pin Assignment
for DIP and Flatpak
DS100271-3
Pin Assignment
for LCC
DS100271-4
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2
Logic Diagram
DS100271-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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3
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
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'AC
2.0V to 6.0V
'ACT
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
)
54AC/ACT
-55C to +125C
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
125 mV/ns
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
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
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 2)
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 2)
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
I
OLD
Minimum Dynamic
Output Current (Note 3)
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
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4
DC Characteristics for 'AC Family Devices
(Continued)
54AC
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
I
CC
Maximum Quiescent
5.5
80.0
A
V
IN
= V
CC
Supply Current
or GND
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.
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
@
25C is identical to 74AC
@
25C.
DC Characteristics for 'ACT Family Devices
54ACT
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 5)
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 5)
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
CCT
Maximum
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
CC
/Input
I
OLD
Minimum Dynamic
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
Output Current (Note 6)
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: 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
@
25C is identical to 74ACT
@
25C.
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