參數(shù)資料
型號: DM7490A
廠商: Fairchild Semiconductor Corporation
元件分類: 通用總線功能
英文描述: Decade and Binary Counters(十進制和二進制計數(shù)器)
中文描述: 十年二進制計數(shù)器(十進制和二進制計數(shù)器)
文件頁數(shù): 2/5頁
文件大?。?/td> 47K
代理商: DM7490A
www.fairchildsemi.com
2
D
Function Tables
BCD Count Sequence
(Note 1)
BCD Bi-Quinary (5-2)
(Note 2)
Reset/Count Function Table
H
=
HIGH Level
L
=
LOW Level
X
=
Don’t Care
Note 1:
Output QA is connected to input B for BCD count.
Note 2:
Output QD is connected to input A for bi-quinary count
Logic Diagram
The J and K inputs shown without connection are for reference only and
are functionally at a HIGH level.
Count
Outputs
Q
C
L
L
L
L
H
H
H
H
L
L
Q
D
L
L
L
L
L
L
L
L
H
H
Q
B
L
L
H
H
L
L
H
H
L
L
Q
A
L
H
L
H
L
H
L
H
L
H
0
1
2
3
4
5
6
7
8
9
Count
Outputs
Q
D
L
L
L
L
H
L
L
L
L
H
Q
A
L
L
L
L
L
H
H
H
H
H
Q
C
L
L
H
H
L
L
L
H
H
L
Q
B
L
H
L
H
L
L
H
L
H
L
0
1
2
3
4
5
6
7
8
9
Reset Inputs
R0(2)
Outputs
Q
C
L
L
L
COUNT
COUNT
COUNT
COUNT
R0(1)
R9(1)
R9(2)
Q
D
L
L
H
Q
B
L
L
L
Q
A
L
L
H
H
H
X
X
L
L
X
H
H
X
L
X
X
L
L
X
H
X
L
X
L
X
L
H
L
X
L
X
相關PDF資料
PDF描述
DM7490AN Decade and Binary Counters
DM74ALS00 Quad 2-Input NAND Gate
DM74ALS00AM Quad 2-Input NAND Gate
DM74ALS00AN Low-Offset Voltage Operational Amplifier 8-SOIC 0 to 70
DM74ALS00ASJ Low-Offset Voltage Operational Amplifier 8-SOIC 0 to 70
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