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參數(shù)資料
| 型號(hào)： | HD74HC78 |
| 廠(chǎng)商： | Hitachi,Ltd. |
| 英文描述： | Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock) |
| 中文描述： | 雙JK觸發(fā)器（帶預(yù)置，共同明確和共同的時(shí)鐘） |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 59K |
| 代理商： | HD74HC78 |
HD74HC78
2
Function Table
Inputs
Outputs
Preset
Clear
Clock
J
K
Q
Q
L
H
X
X
X
H
L
H
L
X
X
X
L
H
L
L
X
X
X
H*
1
H*
1
H
H
L
L
No change
H
H
L
H
L
H
H
H
H
L
H
L
H
H
H
H
Toggle
H
H
L
X
X
No change
H
H
H
X
X
No change
H
H
X
X
No change
Note:
1. Q and
Q
will remain HIGH as long as Preset and Clear are Low, but Q and
Q
are unpredictable,
if Preset and Clear go HIGH simultaneously.
Pin Arrangement
1
2
3
4
5
6
7
CK
1PR
1J
V
CC
CLR
2PR
2K
1K
1Q
1
Q
GND
2J
2
Q
2Q
14
13
12
11
10
9
8
(Top view)
CK
K
CLR
Q
Q
J
PR
CK
K
CLR
Q
Q
J
PR
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