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MB88155 Datasheet(PDF) 1 Page - Fujitsu Component Limited.

Part No. MB88155
Description  Spread Spectrum Clock Generator
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Maker  FUJITSU [Fujitsu Component Limited.]
Homepage  http://edevice.fujitsu.com/fmd/en/index.html
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MB88155 Datasheet(HTML) 1 Page - Fujitsu Component Limited.

 
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DS04-29119-2E
FUJITSU SEMICONDUCTOR
DATA SHEET
Copyright©2005-2006 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)
• Output frequency : CKOUT
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)
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 less than 150 ps
MB88155-1xx
20 MHz to 50 MHz
less than 100 ps
MB88155-4xx
less than 200 ps
• 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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