MB88151 Fujitsu Media Devices, MB88151 Datasheet - Page 5

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MB88151

Manufacturer Part Number
MB88151
Description
Spread Spectrum Clock Generator
Manufacturer
Fujitsu Media Devices
Datasheet

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

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