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Номер в каталоге
Компоненты Описание
SN74LS90D Просмотр технического описания (PDF) - ON Semiconductor
Номер в каталоге
Компоненты Описание
производитель
SN74LS90D
DECADE COUNTER; DIVIDE-BY-TWELVE COUNTER; 4-BIT BINARY COUNTER
ON Semiconductor
SN74LS90D Datasheet PDF : 7 Pages
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SN74LS90
LS90
MODE SELECTION
RESET / SET INPUTS
MR
1
MR
2
MS
1
MS
2
H
H
L
X
H
H
X
L
X
X
H
H
L
X
L
X
X
L
X
L
L
X
X
L
X
L
L
X
OUTPUTS
Q
0
Q
1
L
L
L
L
H
L
Q
2
Q
3
L
L
L
L
L
H
Count
Count
Count
Count
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
LS92 AND LS93
MODE SELECTION
RESET
INPUTS
MR
1
MR
2
H
H
L
H
H
L
L
L
OUTPUTS
Q
0
Q
1
Q
2
Q
3
L
L
L
L
Count
Count
Count
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
LS90
BCD COUNT SEQUENCE
COUNT
0
1
2
3
4
5
6
7
8
9
OUTPUT
Q
0
Q
1
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
H
L
L
H
L
Q
2
Q
3
L
L
L
L
L
L
L
L
H
L
H
L
H
L
H
L
L
H
L
H
LS92
TRUTH TABLE
COUNT
0
1
2
3
4
5
6
7
8
9
10
11
OUTPUT
Q
0
Q
1
L
L
H
L
L
H
H
H
L
L
H
L
L
L
H
L
L
H
H
H
L
L
H
L
Q
2
Q
3
L
L
L
L
L
L
L
L
H
L
H
L
L
H
L
H
L
H
L
H
H
H
H
H
NOTE: Output Q
0
is connected to Input
CP
1
for BCD count.
NOTE: Output Q
0
is connected to Input
CP
1
.
LS93
TRUTH TABLE
COUNT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUTPUT
Q
0
Q
1
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
H
Q
2
Q
3
L
L
L
L
L
L
L
L
H
L
H
L
H
L
H
L
L
H
L
H
L
H
L
H
H
H
H
H
H
H
H
H
NOTE: Output Q
0
is connected to Input
CP
1
.
GUARANTEED OPERATING RANGES
Symbol
Parameter
V
CC
Supply Voltage
T
A
Operating Ambient Temperature Range
I
OH
Output Current — High
I
OL
Output Current — Low
Min
Typ
Max
Unit
54
4.5
5.0
5.5
V
74
4.75
5.0
5.25
54
−
55
25
125
°
C
74
0
25
70
54, 74
−
0.4
mA
54
4.0
mA
74
8.0
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