MB88151A View Datasheet(PDF) - Cypress Semiconductor

Part Name

Description

Manufacturer

MB88151A

Spread Spectrum Clock Generator

Cypress Semiconductor 

6. Block Diagram

VDD

MB88151A

SEL1

SEL0

ENS/XPD

XOUT

Modulation rate

setting

Modulation rate

setting

Modulation enable setting/

Power down setting

Reference clock

PLL block

Modulation

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

MB88151A PLL block

enable setting

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

dramatically reducing EMI.

Document Number: 002-08311 Rev. *B

Page 7 of 26

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