74F158A Quad 2-Input Multiplexer
April 1988
Revised July 1999
74F158A
Quad 2-Input Multiplexer
General Description
The F158A is a high speed quad 2-input multiplexer. It
selects four bits of data from two sources using the com-
mon Select and Enable inputs. The four outputs present
the selected data in the inverted form. The F158A can also
generate any four of the 16 different functions of two vari-
ables.
Ordering Code:
Order Number
74F158ASC
74F158ASJ
74F158APC
Package Number
M16A
M16D
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation
DS009484
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74F158A
Unit Loading/Fan Out
U.L.
Pin Names
I
0a
–I
0d
I
1a
–I
1d
E
S
Z
a
–Z
d
Description
HIGH/LOW
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input (Active LOW)
Select Input
Inverted Outputs
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
50/33.3
Input I
IH
/I
IL
Output I
OH
/I
OL
20
µA/−0.6
mA
20
µA/−0.6
mA
20
µA/−0.6
mA
20
µA/−0.6
mA
−1
mA/20 mA
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
Functional Description
The F158A quad 2-input multiplexer selects four bits of
data from two sources under the control of a common
Select 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 regard-
less of all other inputs. The F158A is the logic implementa-
tion 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 F158A is the moving of data from two
groups of registers to four common output busses. The
particular register from which the data comes is determined
by the state of the Select input. A less obvious use is as a
function generator. The F158A can generate four functions
of two variables with one variable common. This is useful
for implementing gating functions.
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
n
=
E
×
(I
1n
S
+
I
0n
S)
Logic Diagram
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
74F158A
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−0.5V
to V
CC
−0.5V
to
+5.5V
−65°C
to
+150°C
−55°C
to
+125°C
−55°C
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to
+5.5V
Note 1:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
I
IL
I
OS
I
CCH
I
CCL
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW
Voltage
Input HIGH
Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Short-Circuit Current
Power Supply Current
Power Supply Current
−60
10
15
4.75
3.75
−0.6
−150
15
25
10% V
CC
5% V
CC
10% V
CC
2.5
2.7
0.5
5.0
7.0
50
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
V
µA
µA
µA
V
µA
mA
mA
mA
mA
Min
Min
Min
Max
Max
Max
0.0
0.0
Max
Max
Max
Max
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −1
mA
I
OH
= −1
mA
I
OL
=
20 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
IN
=
0.5V
V
OUT
=
0V
V
O
=
HIGH
V
O
=
LOW
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S to Z
n
Propagation Delay
E to Z
n
Propagation Delay
I
n
to Z
n
3.0
2.5
2.5
2.0
2.5
1.5
V
CC
= +5.0V
C
L
=
50 pF
Typ
5.5
4.5
4.5
4.0
4.0
2.5
Max
8.5
6.5
6.0
6.0
5.9
4.0
T
A
= −55°C
to
+125°C
V
CC
= +5.0V
C
L
=
50 pF
Min
3.0
2.5
2.5
2.0
2.5
1.0
Max
10.5
8.0
8.0
7.0
8.5
5.0
T
A
=
0°C to
++70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
3.0
2.5
2.5
2.0
2.5
1.5
Max
9.5
7.0
7.0
6.5
7.0
4.5
ns
Units
ns
ns
3
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74F158A
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M16A
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
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4
74F158A Quad 2-Input Multiplexer
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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which, (a) are intended for surgical implant into the
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user.
5
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