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Электронный компонент: 74LS151

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Semiconductor Components Industries, LLC, 1999
December, 1999 Rev. 6
1
Publication Order Number:
SN74LS151/D
SN74LS151
8-Input Multiplexer
The TTL / MSI SN74LS151 is a high speed 8-input Digital
Multiplexer. It provides, in one package, the ability to select one bit of
data from up to eight sources. The LS151 can be used as a universal
function generator to generate any logic function of four variables.
Both assertion and negation outputs are provided.
Schottky Process for High Speed
Multifunction Capability
On-Chip Select Logic Decoding
Fully Buffered Complementary Outputs
Input Clamp Diodes Limit High Speed Termination Effects
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
4.75
5.0
5.25
V
T
A
Operating Ambient
Temperature Range
0
25
70
C
I
OH
Output Current High
0.4
mA
I
OL
Output Current Low
8.0
mA
LOW
POWER
SCHOTTKY
Device
Package
Shipping
ORDERING INFORMATION
SN74LS151N
16 Pin DIP
2000 Units/Box
SN74LS151D
16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS151
http://onsemi.com
2
CONNECTION DIAGRAM DIP (TOP VIEW)
Select Inputs
Enable (Active LOW) Input
Multiplexer Inputs
Multiplexer Output
Complementary Multiplexer Output
S
0
S
2
E
I
0
I
7
Z
Z
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 U.L.
5 U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
mA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 5 U.L. for Commercial (74) Temperature Ranges.
HIGH
LOW
(Note a)
LOADING
PIN NAMES
V
CC
= PIN 16
GND = PIN 8
LOGIC SYMBOL
11
10
9
6
5
7 4 3 2 1 15 14 13 12
E I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
S
0
S
1
S
2
Z
Z
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
V
CC
I
3
I
4
I
5
I
6
I
7
S
1
S
0
S
2
I
2
I
1
I
0
Z
Z
E
GND
SN74LS151
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3
LOGIC DIAGRAM
S
2
S
1
S
0
E
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Z
Z
14
1
2
6
7
3
4
5
9
11
12
10
13
15
V
CC
= PIN 16
GND = PIN 8
= PIN NUMBERS
FUNCTIONAL DESCRIPTION
The LS151 is a logical 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
0
S
1
S
2
+
I
1
S
0
S
1
S
2
+ I
2
S
0
S
1
S
2
+ I
3
S
0
S
1
S
2
+ I
4
S
0
S
1
S
2
+ I
5
S
0
S
1
S
2
+ I
6
S
0
S
1
S
2
+ I
7
S
0
S
1
S
2
).
The LS151 provides the ability, in one package, to select
from eight sources of data or control information. By proper
manipulation of the inputs, the LS151 can provide any logic
function of four variables and its negation.
TRUTH TABLE
E
S
2
S
1
S
0
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Z
Z
H
X
X
X
X
X
X
X
X
X
X
X
H
L
L
L
L
L
L
X
X
X
X
X
X
X
H
L
L
L
L
L
H
X
X
X
X
X
X
X
L
H
L
L
L
H
X
L
X
X
X
X
X
X
H
L
L
L
L
H
X
H
X
X
X
X
X
X
L
H
L
L
H
L
X
X
L
X
X
X
X
X
H
L
L
L
H
L
X
X
H
X
X
X
X
X
L
H
L
L
H
H
X
X
X
L
X
X
X
X
H
L
L
L
H
H
X
X
X
H
X
X
X
X
L
H
L
H
L
L
X
X
X
X
L
X
X
X
H
L
L
H
L
L
X
X
X
X
H
X
X
X
L
H
L
H
L
H
X
X
X
X
X
L
X
X
H
L
L
H
L
H
X
X
X
X
X
H
X
X
L
H
L
H
H
L
X
X
X
X
X
X
L
X
H
L
L
H
H
L
X
X
X
X
X
X
H
X
L
H
L
H
H
H
X
X
X
X
X
X
X
L
H
L
L
H
H
H
X
X
X
X
X
X
X
H
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
SN74LS151
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4
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
V
IH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
V
IL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
V
IK
Input Clamp Diode Voltage
0.65
1.5
V
V
CC
= MIN, I
IN
= 18 mA
V
OH
Output HIGH Voltage
2.7
3.5
V
V
CC
= MIN, I
OH
= MAX, V
IN
= V
IH
or V
IL
per Truth Table
V
O
Output LOW Voltage
0.25
0.4
V
I
OL
= 4.0 mA
V
CC
= V
CC
MIN,
V
V
or V
V
OL
Output LOW Voltage
0.35
0.5
V
I
OL
= 8.0 mA
V
IN
= V
IL
or V
IH
per Truth Table
I
Input HIGH Current
20
A
V
CC
= MAX, V
IN
= 2.7 V
I
IH
Input HIGH Current
0.1
mA
V
CC
= MAX, V
IN
= 7.0 V
I
IL
Input LOW Current
0.4
mA
V
CC
= MAX, V
IN
= 0.4 V
I
OS
Short Circuit Current (Note 1)
20
100
mA
V
CC
= MAX
I
CC
Power Supply Current
10
mA
V
CC
= MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(T
A
= 25
C)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
t
PLH
t
PHL
Propagation Delay
Select to Output Z
27
18
43
30
ns
t
PLH
t
PHL
Propagation Delay
Select to Output Z
14
20
23
32
ns
t
PLH
t
PHL
Propagation Delay
Enable to Output Z
26
20
42
32
ns
V
CC
= 5.0 V
t
PLH
t
PHL
Propagation Delay
Enable to Output Z
15
18
24
30
ns
CC
C
L
= 15 pF
t
PLH
t
PHL
Propagation Delay
Data to Output Z
20
16
32
26
ns
t
PLH
t
PHL
Propagation Delay
Data to Output Z
13
12
21
20
ns
AC WAVEFORMS
Figure 1.
Figure 2.
V
IN
V
OUT
1.3 V
t
PHL
1.3 V
t
PLH
1.3 V
1.3 V
V
IN
V
OUT
1.3 V
t
PHL
1.3 V
t
PLH
1.3 V
1.3 V
SN74LS151
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5
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 64808
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
A
B
F
C
S
H
G
D
J
L
M
16 PL
SEATING
1
8
9
16
K
PLANE
T
M
A
M
0.25 (0.010)
T
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.740
0.770
18.80
19.55
B
0.250
0.270
6.35
6.85
C
0.145
0.175
3.69
4.44
D
0.015
0.021
0.39
0.53
F
0.040
0.70
1.02
1.77
G
0.100 BSC
2.54 BSC
H
0.050 BSC
1.27 BSC
J
0.008
0.015
0.21
0.38
K
0.110
0.130
2.80
3.30
L
0.295
0.305
7.50
7.74
M
0
10
0
10
S
0.020
0.040
0.51
1.01
_
_
_
_
SN74LS151
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6
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B05
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1
8
16
9
SEATING
PLANE
F
J
M
R
X 45
_
G
8 PL
P
B
A
M
0.25 (0.010)
B
S
T
D
K
C
16 PL
S
B
M
0.25 (0.010)
A
S
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
9.80
10.00
0.386
0.393
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27 BSC
0.050 BSC
J
0.19
0.25
0.008
0.009
K
0.10
0.25
0.004
0.009
M
0
7
0
7
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
_
_
_
_
SN74LS151
http://onsemi.com
7
Notes
SN74LS151
http://onsemi.com
8
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