MB88153A 데이터 시트보기 (PDF) - Fujitsu

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MB88153A

Spread Spectrum Clock Generator

Fujitsu 

MB88153A

■ BLOCK DIAGRAM

VDD

XPD 8

Power down

Frequency setting

FREQ0 7

Frequency setting

FREQ1 6

Modulation enable

setting

ENS 5

CKIN 1

Clock input

2

PLL block

3

VSS

Modulation

clock output

4 CKOUT

Reference

clock

1

Frequency setting

−

M

Phase

compare

Charge

pump

V/I

conversion

IDAC

ICO

Modulation

1

clock output

−

N

Loop filter

Modulation rate

1

−

Modulation logic

setting/

L

Modulation enable

setting

MB88153A PLL block

A glitchless IDAC (current output D/A converter) provides precise modulation, thereby dramatically reducing

EMI.

6

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