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PDF SN74LS251 Data sheet ( Hoja de datos )
| Número de pieza | SN74LS251 | |
| Descripción | 8-INPUT MULTIPLEXER | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SN74LS251 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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8-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
The TTL/MSI SN74LS251 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 LS251 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
• Inverting and Non-Inverting 3-State Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC I4 I5 I6 I7 S0 S1 S2
16 15 14 13 12 11 10 9
SN54/74LS251
8-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
1 2 3 4 56 78
I3 I2 I1 I0 Z Z E0 GND
PIN NAMES
S0–S2
E0
I0–I7
Z
Select Inputs
Output Enable (Active LOW) Inputs
Multiplexer Inputs
Multiplexer Output
Z Complementary Multiplexer Output
NOTES:
a. 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
LOADING (Note a)
HIGH
LOW
0.5 U.L.
0.5 U.L.
0.5 U.L.
65 U.L.
65 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
15 U.L.
15 U.L.
16
1
16
1
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
LOGIC DIAGRAM
9
S2
10
S1
11
S0
7
E1
I0 I1
I2 I3 I4
I5 I6
I7
4 3 2 1 15 14 13 12
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
5
Z
FAST AND LS TTL DATA
5-410
6
Z
1 page  
Case 751B-03 D Suffix
16-Pin Plastic
SO-16
-A-
16 9
-B-
P 0.25 (0.010) M
BM
1
8 PL
8
G
-T-
D16 PL
0.25 (0.010) M T B S
AS
C
SEATING
PLANE
K
R X 45°
MF
J
Case 648-08 N Suffix
16-Pin Plastic
-A-
16 9
B
18
F
C
S
-T-
SEATING
PLANE
L
H
G
D 16 PL
K
0.25 (0.010) M T A M
J
M
Case 620-09 J Suffix
-A- 16-Pin Ceramic Dual In-Line
16 9
-B-
18
CL
-T-
SEATING
PLANE
F
E
G
D 16 PL
N
0.25 (0.010) M T A S
K
M
J 16 PL
0.25 (0.010) M T B S
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. 751BĆ01 IS OBSOLETE, NEW STANDARD
751BĆ03.
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN MAX
9.80
10.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0°Ă
0.25
7°Ă
5.80
6.20
0.25
0.50
INCHES
MIN MAX
0.386
0.393
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0°Ă
0.009
7°Ă
0.229
0.244
0.010
0.019
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.
6. 648Ć01 THRU Ć07 OBSOLETE, NEW STANDARD
648Ć08.
DIM
A
B
C
D
F
G
H
J
K
L
M
S
MILLIMETERS
MIN MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
0°
7.74
10°
0.51
1.01
INCHES
MIN MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.070
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0°
0.305
10°
0.020
0.040
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIM F MAY NARROW TO 0.76 (0.030) WHERE
THE LEAD ENTERS THE CERAMIC BODY.
5. 620Ć01 THRU Ć08 OBSOLETE, NEW STANDARD
620Ć09.
DIM
A
B
C
D
E
F
G
J
K
L
M
N
MILLIMETERS
MIN MAX
19.05 19.55
6.10
7.36
Ċ 4.19
0.39
0.53
1.27 BSC
1.40
1.77
2.54 BSC
0.23
0.27
Ċ 5.08
7.62 BSC
0° 15°
0.39
0.88
INCHES
MIN MAX
0.750
0.770
0.240
0.290
Ċ 0.165
0.015
0.021
0.050 BSC
0.055
0.070
0.100 BSC
0.009
0.011
Ċ 0.200
0.300 BSC
0° 15°
0.015
0.035
FAST AND LS TTL DATA
5-414
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet SN74LS251.PDF ] | |
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