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參數(shù)資料
| 型號(hào)： | HD74HC590 |
| 廠商： | Hitachi,Ltd. |
| 元件分類(lèi)： | 通用總線功能 |
| 英文描述： | 8-bit Binary Counter/Register (with 3-state outputs) |
| 中文描述： | 8位二進(jìn)制計(jì)數(shù)器/寄存器（3態(tài)輸出） |
| 文件頁(yè)數(shù)： | 2/11頁(yè) |
| 文件大?。?/td> | 66K |
| 代理商： | HD74HC590 |
HD74HC590
2
Function Table
Inputs
G
RCK
CCLR
CCKEN
CCK
Function
H
X
X
X
X
Q output disabled
L
X
X
X
X
Q output enabled
X
X
X
X
Contents of counter stored to register
X
X
X
X
No change in register
X
X
L
X
X
Counter clear
X
X
H
L
Count up
X
X
H
L
No count
X
X
H
H
X
No count
RCO
= QA’QB’QC’QD’QE’QF’QG’QH’ (
CCKEN
) (QA’ to QH’: Output of Internal Counter)
Pin Arrangement
1
(Top view)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Q
B
V
CC
Q
A
C
CCKEN
CCK
CCLR
RCO
RCK
Q
C
Q
D
Q
E
Q
F
Q
G
Q
H
GND
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