MB88151 View Datasheet(PDF) - Fujitsu

Part Name

Description

MFG CO.

MB88151

Spread Spectrum Clock Generator

Fujitsu

'MB88151' PDF : 20 Pages View PDF

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■ BLOCK DIAGRAM
VDD
MB88151
SEL1
SEL0
ENS
XOUT
Modulation rate
setting
Modulation rate
setting
Modulation enable setting
Reference clock
PLL block
Clock output
CKOUT
XIN
Rf = 1 MΩ
VSS
1
−
M
Reference clock 1
−
N
Phase
compare
Charge
pump
V/I
conversion
IDAC
Loop filter
ICO
Modulation clock
output
1
Modulation
−
L
Modulation logic
rate setting/
Modulation
enable setting
MB88151 PLL block
A glitchless IDAC (current output D/A converter) provides precise modulation,
thereby dramatically reducing EMI.
5

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