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參數(shù)資料
| 型號(hào)： | MB88155-412 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Spread Spectrum Clock Generator |
| 中文描述： | 擴(kuò)頻時(shí)鐘發(fā)生器 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 220K |
| 代理商： | MB88155-412 |
DS04-29119-2E
FUJITSU SEMICONDUCTOR
DATA SHEET
Copyright2005-2006 FUJITSU LIMITED All rights reserved
Spread Spectrum Clock Generator
MB88155
■
DESCRIPTION
MB88155 is a clock generator for EMI (Electro Magnetic Interference) reduction. The peak of unnecessary radi-
ation noise (EMI) can be attenuated by making the oscillation frequency slightly modulate periodically with the
internal modulator. For modulation, the MB88155 supports both center-spreading and down-spreading. It has a
non-modulated clock output pin (REFOUT) as well as a modulated clock output pin (CKOUT) .
■
FEATURES
Input frequency :
12.5 MHz to 50 MHz (Multiplied by 1)
12.5 MHz to 20 MHz (Multiplied by 4)
12.5 MHz to 80 MHz
REFOUT
The same as input frequency (not multiplied)
Modulation rate :
±
0.5
%
,
±
1.0
%
(center spread) ,
1.0
%
,
2.0
%
(Down spread)
Equipped with oscillation circuit : range of oscillation 12.5 MHz to 40 MHz (Fundamental oscillation)
Output frequency : CKOUT
40 MHz to 48 MHz (3rd overtone)
Modulation clock output Duty : 40
%
to 60
%
Modulation clock cycle
cycle jitter : MB88155-1xx
12.5 MHz to 20 MHz
20 MHz to 50 MHz
less than 150 ps
less than 100 ps
less than 200 ps
MB88155-1xx
MB88155-4xx
Low current consumption by CMOS process : 5 mA (24 MHz : Typ-sample, no load)
Power supply voltage : 3.3 V
±
0.3 V
Operating temperature :
40
°
C to
+
85
°
C
Package : 8-pin plastic TSSOP
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