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參數(shù)資料
| 型號(hào)： | HD74HC490 |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-bit Decade Counters |
| 中文描述： | 雙4位十年計(jì)數(shù)器 |
| 文件頁(yè)數(shù)： | 2/8頁(yè) |
| 文件大?。?/td> | 44K |
| 代理商： | HD74HC490 |
HD74HC490
2
BCD Count Sequence
Outputs
Count
Q
D
L
Q
C
L
Q
B
L
Q
A
L
0
1
L
L
L
H
2
L
L
H
L
3
L
L
H
H
4
L
H
L
L
5
L
H
L
H
6
L
H
H
L
7
L
H
H
H
8
H
L
L
L
9
H
L
L
H
Pin Arrangement
CLR
Q
A
CLR
Q
A
Q
B
Q
C
Q
D
Q
B
Q
C
Q
D
CK
CK
(Top view)
1
2
3
4
5
6
7
8
S
S
9
10
11
12
13
14
15
16
1 Set-
to-9
1Q
B
1Q
C
1Q
D
GND
1Clock
1Clear
1Q
A
Output
V
CC
2Clock
2 Set-
to-9
2Q
B
2Q
C
2Q
D
2Clear
2Q
A
Output
O
O
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD74HC51FP | 制造商:Renesas Electronics 功能描述:74HC |
| HD74HC51FP-E | 制造商:Renesas Electronics Corporation 功能描述: |
| HD74HC51P | 制造商:Hitachi 功能描述: |
| HD74HC51P-E | 制造商:Renesas Electronics Corporation 功能描述: |
| HD74HC540FP-E | 制造商:Renesas Electronics Corporation 功能描述:Logic, 74HC series, SOP-20 |
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