54AC153
•
54ACT153 Dual 4-Input Multiplexer
September 1998
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
n
n
n
I
CC
reduced by 50%
Outputs source/sink 24 mA
’ACT153 has TTL-compatible inputs
Standard Microcircuit Drawings (SMD)
— ’AC153: 5962-87625
— ’ACT153: 5962-87698
Logic Symbols
IEEE/IEC
DS100271-1
DS100271-2
Pin
Names
I
0a
–I
3a
I
0b
–I
3b
S
0
, S
1
E
a
E
b
Z
a
Z
b
Description
Side A Data Inputs
Side B Data Inputs
Common Select
Inputs
Side A Enable Input
Side B Enable Input
Side A Output
Side B Output
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100271
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Connection Diagrams
Pin Assignment
for DIP and Flatpak
Pin Assignment
for LCC
DS100271-3
DS100271-4
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
)
= E
b
•
(I
0b
•
S
1
•
S
0
+ I
1b
•
S
1
•
S
0
+
Z
b
I
2b
•
S
1
•
S
0
+ I
3b
•
S
1
•
S
0
)
Truth Table
Select
Inputs
S
0
X
L
L
H
H
L
L
H
H
S
1
X
L
L
L
L
H
H
H
H
E
H
L
L
L
L
L
L
L
L
I
0
X
L
H
X
X
X
X
X
X
I
1
X
X
X
L
H
X
X
X
X
I
2
X
X
X
X
X
L
H
X
X
I
3
X
X
X
X
X
X
X
L
H
Z
L
L
H
L
H
L
H
L
H
Inputs (a or b)
Output
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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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.
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
Symbol
Parameter
V
CC
(V)
54AC
T
A
=
−55˚C to +125˚C
Guaranteed
Limits
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
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
I
OH
= −24 mA
I
OH
= −24 mA
I
OUT
= 50 µA
V
(Note 2)
V
IN
= V
IL
or V
IH
I
OL
= 12 mA
V
µA
mA
mA
I
OL
= 24 mA
I
OL
= 24 mA
V
I
= V
CC
, GND
V
OLD
= 1.65V Max
V
OHD
= 3.85V Min
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
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0.50
0.50
0.50
Maximum Input
Leakage Current
Minimum Dynamic
Output Current (Note 3)
5.5
5.5
5.5
±
1.0
50
−50
4
DC Characteristics for ’AC Family Devices
Symbol
Parameter
V
CC
(V)
(Continued)
54AC
T
A
=
−55˚C to +125˚C
Guaranteed
Limits
Units
Conditions
I
CC
Maximum Quiescent
Supply Current
5.5
80.0
µA
V
IN
= V
CC
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
@
25˚C is identical to 74AC
@
25˚C.
DC Characteristics for ’ACT Family Devices
Symbol
Parameter
V
CC
(V)
54ACT
T
A
=
−55˚C to +125˚C
Guaranteed
Limits
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
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
5
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