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參數(shù)資料
| 型號： | 933406770653 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 計(jì)數(shù)器 |
| 英文描述： | 4000/14000/40000 SERIES, ASYN NEGATIVE EDGE TRIGGERED 24-BIT UP BINARY COUNTER, PDSO16 |
| 封裝： | PLASTIC, SOT-109-1, SO-16 |
| 文件頁數(shù)： | 11/11頁 |
| 文件大小： | 156K |
| 代理商： | 933406770653 |
January 1995
9
Philips Semiconductors
Product specication
24-stage frequency divider and oscillator
HEF4521B
MSI
Fig.7
RC oscillator circuit;
f in Hz, R in
, C in F.
f
1
2,3
R
TC
C
×
------------------------------------
;R
S
2R
TC i n which:
,
≥
≈
R
S
R
TC
V
IL max
I
LI
------------------
<
+
maximum input voltage LOW
()
input leakage current
()
Fig.8
Oscillator frequency as a
function of RTC and C;
VDD = 10 V; test circuit is
Fig.7.
RTC; C = 1 nF; RS ≈ 2 RTC
C; RTC = 56 k; RS = 120 k
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