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參數(shù)資料
| 型號(hào)： | SN74LS139D |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | LOW POWER SCHOTTKY |
| 中文描述： | LS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 115K |
| 代理商： | SN74LS139D |
SN74LS139
http://onsemi.com
3
LOGIC DIAGRAM
V
CC
= PIN 16
GND = PIN 8
= PIN NUMBERS
A
0a
A
1a
E
a
A
0b
O
3a
O
0b
O
1b
O
2b
O
3b
O
1a
O
2a
E
b
A
1b
O
0a
12
11
6
7
4
5
10
9
1
2
3
15
14
13
FUNCTIONAL DESCRIPTION
The LS139 is a high speed dual 1-of-4 decoder/
demultiplexer fabricated with the Schottky barrier diode
process. The device has two independent decoders, each of
which accept two binary weighted inputs (A
0
, A
1
) and
provide four mutually exclusive active LOW outputs
(O
0
–O
3
). Each decoder has an active LOW Enable (E).
When E is HIGH all outputs are forced HIGH. The enable
can be used as the data input for a 4-output demultiplexer
application.
Each half of the LS139 generates all four minterms of two
variables. These four minterms are useful in some
applications, replacing multiple gate functions as shown in
Fig. a, and thereby reducing the number of packages
required in a logic network.
TRUTH TABLE
INPUTS
OUTPUTS
E
A
0
A
1
O
0
O
1
O
2
O
3
H
L
L
L
L
X
L
H
L
H
X
L
L
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Figure a
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
O
0
O
1
O
2
O
3
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
O
0
O
1
O
2
O
3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN74LS139N | LOW POWER SCHOTTKY |
| SN74LS13D | SCHMITT TRIGGERS DUAL GATE/HEX INVERTER |
| SN74LS13N | SCHMITT TRIGGERS DUAL GATE/HEX INVERTER |
| SN74LS13 | SCHMITT TRIGGERS DUAL GATE/HEX INVERTER |
| SN74LS145D | 1-OF-10 DECODER/DRIVER OPEN-COLLECTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS139DR2 | 制造商:ON Semiconductor 功能描述:Decoder/Demultiplexer Dual 2-to-4 16-Pin SOIC T/R |
| SN74LS139M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS139N | 制造商:Panasonic Industrial Company 功能描述:IC |
| SN74LS139ND | 制造商:Motorola Inc 功能描述: |
| SN74LS139NDS | 制造商:Motorola Inc 功能描述: |
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