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74F151A 8-Input Multiplexer
April 1988
Revised September 2000
74F151A
8-Input Multiplexer
General Description
The F151A 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 F151A can be used as a
universal function generator to generate any logic function
of four variables. Both assertion and negation outputs are
provided.
Ordering Code:
Order Number
74F151ASC
74F151ASJ
74F151APC
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
Unit Loading/Fan Out
U.L.
Pin Names
I
0
–I
7
S
0
–S
2
E
Z
Z
Description
Data Inputs
Select Inputs
Enable Input (Active LOW)
Data Output
Inverted Data Output
1.0/1.0
1.0/1.0
1.0/1.0
50/33.3
50/33.3
Input I
IH
/I
IL
HIGH/LOW Output I
OH
/I
OL
20
µ
A/
−
0.6 mA
20
µ
A/
−
0.6 mA
20
µ
A/
−
0.6 mA
−
1 mA/20 mA
−
1 mA/20 mA
© 2000 Fairchild Semiconductor Corporation
DS009481
www.fairchildsemi.com
74F151A
Functional Description
The F151A 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 assertion and
negation outputs are provided. The Enable input (E) is
active LOW. When it is not activated, the negation output is
HIGH and the assertion output is LOW regardless of all
other inputs. The logic function provided at the output is:
Z
=
E • (I
0
S
2
S
1
S
0
+
I
1
S
2
S
1
S
0
+
I
2
S
2
S
1
S
0
+
I
3
S
2
S
1
S
0
+
I
4
S
2
S
1
S
0
+
I
5
S
2
S
1
S
0
+
I
6
S
2
S
1
S
0
+
I
7
S
2
S
1
S
0
)
The F151A provides the ability, in one package, to select
from eight sources of data or control information. By proper
manipulation of the inputs, the F151A can provide any logic
function of four variables and its negation.
Truth Table
Inputs
E
H
L
L
L
S
2
X
L
L
L
S
1
X
L
L
H
S
0
X
L
H
L
Z
H
I
0
I
1
I
2
Outputs
Z
L
I
0
I
1
I
2
L
L
L
L
L
L
H
H
H
H
H
L
L
H
H
H
L
H
L
H
I
3
I
4
I
5
I
6
I
7
I
3
I
4
I
5
I
6
I
7
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
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
74F151A
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)
twice the rated I
OL
(mA)
−
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
−
0.5V to V
CC
−
0.5V 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
CC
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
−60
13.5
4.75
3.75
−0.6
−150
21.0
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
Min
Min
Min
Max
Max
Max
0.0
0.0
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
3
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74F151A
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
S
n
to Z
Propagation Delay
S
n
to Z
Propagation Delay
E to Z
Propagation Delay
E to Z
Propagation Delay
I
n
to Z
Propagation Delay
I
n
to Z
4.0
3.2
4.5
4.0
3.0
3.0
5.0
3.5
3.0
1.5
3.0
3.7
V
CC
= +5.0V
C
L
=
50 pF
Typ
6.2
5.2
7.5
6.2
4.7
4.4
7.0
5.3
4.8
2.5
4.8
5.5
Max
9.0
7.5
10.5
9.0
6.1
6.0
9.5
7.0
6.5
4.0
6.5
7.0
Min
3.5
3.2
4.5
4.0
3.0
2.5
4.0
3.0
3.0
1.5
2.5
3.7
Max
9.5
7.5
12.0
9.0
7.0
6.0
10.5
7.5
7.0
5.0
7.5
7.5
ns
ns
ns
ns
ns
ns
T
A
=
0°C to
+70°C
C
L
=
50 pF
Units
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