7490 查看數據表（PDF） - ON Semiconductor
零件编号
产品描述 (功能)
生产厂家
7490 Datasheet PDF : 7 Pages
| |||
SN74LS90
LS90
MODE SELECTION
RESET / SET INPUTS
MR1 MR2 MS1 MS2
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
Q0 Q1
L
L
L
L
H
L
Q2 Q3
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
MR1 MR2
H
H
L
H
H
L
L
L
OUTPUTS
Q0 Q1 Q2 Q3
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
Q0 Q1
L
L
H
L
L
H
H
H
L
L
H
L
L
H
H
H
L
L
H
L
Q2 Q3
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
Q0 Q1
L
L
H
L
L
H
H
H
L
L
H
L
L
L
H
L
L
H
H
H
L
L
H
L
Q2 Q3
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 Q0 is connected to Input
CP1 for BCD count.
NOTE: Output Q0 is connected to Input
CP1.
LS93
TRUTH TABLE
COUNT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUTPUT
Q0 Q1
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
Q2 Q3
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 Q0 is connected to Input
CP1.
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
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
http://onsemi.com
4
Share Link: 