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參數(shù)資料
| 型號： | SN74LS139N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | DUAL 1-OF-4 DECODER/ DEMULTIPLEXER |
| 中文描述： | LS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 173K |
| 代理商： | SN74LS139N |
5-236
FAST AND LS TTL DATA
SN54/74LS139
FUNCTIONAL DESCRIPTION
The LS139 is a high speed dual 1-of-4 decoder/demultiplex-
er fabricated with the Schottky barrier diode process. The
device has two independent decoders, each of which accept
two binary weighted inputs (A0, A1) and provide four mutually
exclusive active LOW outputs (O0–O3). 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 applica-
tions, 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
A0
X
L
H
L
H
A1
X
L
L
H
H
O0
H
L
H
H
H
O1
H
H
L
H
H
O2
H
H
H
L
H
O3
H
H
H
H
L
H
L
L
L
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°
C
IOH
IOL
Output Current — High
54, 74
–0.4
mA
Output Current — Low
54
74
4.0
8.0
mA
Figure a
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相關(guān)代理商/技術(shù)參數(shù) |
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| SN74LS139ND | 制造商:Motorola Inc 功能描述: |
| SN74LS139NDS | 制造商:Motorola Inc 功能描述: |
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