54AC58
•
54ACT158 Quad 2-Input Multiplexer
July 1998
54AC158
•
54ACT158
Quad 2-Input Multiplexer
General Description
The ’AC/’ACT158 is a high-speed quad 2-input multiplexer. It
selects four bits of data from two sources using the common
Select and Enable inputs. The four buffered outputs present
the selected data in the inverted form. The ’AC/’ACT158 can
also be used as a function generator.
n
Outputs source/sink 24 mA
n
’ACT158 has TTL-compatible inputs
n
Standard Microcircuit Drawing (SMD)
— ’AC158: 5962-89729
— ’ACT158: 5962-88755
Features
n
I
CC
reduced by 50%
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP and Flatpak
DS100273-1
IEE/IEC
DS100273-3
Pin Assignment
for LCC
DS100273-2
DS100273-4
Pin Names
I
0a
–I
0d
I
1a
–I
1d
E
S
Z
a
–Z
d
Description
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input
Select Input
Inverted Outputs
FACT
™
is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100273
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Functional Description
The ’AC/’ACT158 quad 2-input multiplexer selects four bits
of data from two sources under the control of a common Se-
lect input (S) and presents the data in inverted form at the
four outputs. The Enable input (E) is active-LOW. When E is
HIGH, all of the outputs (Z) are forced HIGH regardless of all
other inputs. The ’AC/’ACT158 is the logic implementation of
a 4-pole, 2-position switch where the position of the switch is
determined by the logic levels supplied to the Select input.
A common use of the ’AC/’ACT158 is the moving of data
from two groups of registers to four common output busses.
The particular register from which the data comes is deter-
mined by the state of the Select input. A less obvious use is
as a function generator. The ’AC/’ACT158 can generate four
functions of two variables with one variable common. This is
useful for implementing gating functions.
Truth Table
Inputs
E
H
L
L
L
L
S
X
L
L
H
H
I
0
X
L
H
X
X
I
1
X
X
X
L
H
Outputs
Z
H
H
L
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Logic Diagram
DS100273-5
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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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)
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
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
3
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DC Characteristics for ’AC Family Devices
Symbol
Parameter
V
CC
(V)
(Continued)
54AC
T
A
=
Units
Conditions
−55˚C to +125˚C
Guaranteed
Limits
I
OLD
I
OHD
I
CC
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent
Supply Current
5.5
5.5
5.5
50
−50
80.0
mA
mA
µA
V
OLD
= 1.65V Max
V
OHD
= 3.85V Min
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
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
Conditions
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
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
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4
AC Electrical Characteristics
V
CC
Symbol
Parameter
(V)
(Note 8)
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
E to Z
n
Propagation Delay
E to Z
n
Propagation Delay
I
n
to Z
n
Propagation Delay
I
n
to Z
n
Note 8:
Voltage Range 3.3 is 3.3V
±
0.3V
Voltage Range 5.0 is 5.0V
±
0.5V
54AC
T
A
= −55˚C
to +125˚C
C
L
= 50 pF
Max
14.0
11.0
14.0
11.0
15.0
12.0
14.0
10.0
11.0
8.5
10.0
7.5
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
Fig.
No.
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
AC Electrical Characteristics
V
CC
Symbol
Parameter
(V)
(Note 9)
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S to Z
n
Propagation Delay
S to Z
n
Propagation Delay
E to Z
n
Propagation Delay
E to Z
n
Propagation Delay
I
n
to Z
n
Propagation Delay
I
n
to Z
n
Note 9:
Voltage Range 5.0 is 5.0V
±
0.5V
54ACT
T
A
= −55˚C
to +125˚C
C
L
= 50 pF
Max
12.0
11.5
11.0
11.0
9.5
8.0
ns
ns
ns
ns
ns
ns
1.0
1.0
1.0
1.0
1.0
1.0
Units
Fig.
No.
5.0
5.0
5.0
5.0
5.0
5.0
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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