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54LS138 bảng dữ liệu(PDF) 1 Page - Motorola, Inc

tên linh kiện 54LS138
Giải thích chi tiết về linh kiện  1-OF-8 DECODER/ DEMULTIPLEXER
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

54LS138 bảng dữ liệu(HTML) 1 Page - Motorola, Inc

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5-230
FAST AND LS TTL DATA
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
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
VCC
A0
O0
O1
O2
O3
O5
O4
O6
A1
A2
E1
E2
E3
O7 GND
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
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.
SN54/74LS138
1-OF-8 DECODER/
DEMULTIPLEXER
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN
Plastic
SN74LSXXXD
SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
VCC = PIN 16
GND = PIN 8
15 14 13 12 11 10 9
1 2 3
4 5 6
1 2 3
A0 A1 A2
E
O0 O1 O2 O3 O4 O5 O6 O7
7
LOGIC DIAGRAM
A2
A1
A0
E1 E2 E3
O7
O6
O5
O4
O3
O2
O1
O0
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
3
2
1
4
5
6
7
9
15
14
13
12
11
10


Số phần tương tự - 54LS138

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