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부품번호 | 54LS138 기능 |
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기능 | 1-OF-8 DECODER/ DEMULTIPLEXER | ||
제조업체 | Motorola Semiconductors | ||
로고 | |||
전체 5 페이지수
( DataSheet : www.DataSheet4U.com )
1-OF-8 DECODER/
DEMULTIPLEXER
The LSTTL / MSI SN54 / 74LS138 is a high speed 1-of-8 Decoder /
Demultiplexer. This device is ideally suited for high speed bipolar memory
chip select address decoding. The multiple input enables allow parallel ex-
pansion to a 1-of-24 decoder using just three LS138 devices or to a 1-of-32
decoder using four LS138s and one inverter. The LS138 is fabricated with the
Schottky barrier diode process for high speed and is completely compatible
with all Motorola TTL families.
• Demultiplexing Capability
• Multiple Input Enable for Easy Expansion
• Typical Power Dissipation of 32 mW
• Active Low Mutually Exclusive Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
V CC O 0 O 1 O 2 O 3 O 4 O 5 O 6
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1 2 3 4 56
78
A 0 A 1 A 2 E 1 E 2 E 3 O 7 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
A0 – A2
E1, E2
E3
O0 – O7
Address Inputs
Enable (Active LOW) Inputs
Enable (Active HIGH) Input
Active LOW Outputs (Note b)
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges.
LOGIC DIAGRAM
A2
3
A1
2
A0
1
E1 E2 E3
45
6
V CC = PIN 16
GND = PIN 8
= PIN NUMBERS
7
O7
9
O6
10
O5
11
O4
12
O3
13
O2
14
O1
15
O0
www.DataSheet4U.com
FAST AND LS TTL DATA
5-230
SN54/74LS138
1-OF-8 DECODER/
DEMULTIPLEXER
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
123
456
12 3
A0 A1 A2
E
O0 O1 O2 O3 O4 O5 O6 O7
15 14 13 12 11 10 9
7
V CC = PIN 16
GND = PIN 8
Case 751B-03 D Suffix
16-Pin Plastic
SO-16
-A-
16
1
G
-T-
D16 PL
0.25 (0.010)
M TB
SA
9
-B-
8
P 0.25 (0.010) M B M
8 PL
R X 45°
C
SEATING
PLANE
K
S
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 AM
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
0.25 (0.010)
MT
A
N
S
K
M
J 16 PL
0.25 (0.010)
MT
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
5-233
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |