參數(shù)資料
型號: 74HC4520
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Dual 4-bit synchronous binary counter
中文描述: 雙4位同步二進制計數(shù)器
文件頁數(shù): 4/7頁
文件大?。?/td> 55K
代理商: 74HC4520
December 1990
4
Philips Semiconductors
Product specification
Dual 4-bit synchronous binary counter
74HC/HCT4520
Fig.4 Functional diagram.
FUNCTION TABLE
Notes
1.
H = HIGH voltage level
L = LOW voltage level
X = don’t care
= LOW-to-HIGH clock transition
= HIGH-to-LOW clock transition
nCP
0
L
X
H
X
nCP
1
H
X
L
X
MR
MODE
L
L
L
L
L
L
H
counter advances
counter advances
no change
no change
no change
no change
Q
0
to Q
3
= LOW
Fig.5 Logic diagram (one counter).
Fig.6 Timing diagram.
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