MB88151A 데이터 시트보기 (PDF) - Cypress Semiconductor

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MB88151A

Spread Spectrum Clock Generator

Cypress Semiconductor 

MB88151A

7. Pin Setting

When changing the pin setting, the stabilization wait time for the modulation clock is required. The stabilization wait time for the

modulation clock take the maximum value of “Electrical Characteristics AC Characteristics Lock-up time”.

ENS Modulation Enable Setting (MB88151A-100/200)

ENS

Modulation

L

No modulation

H

Modulation

Note : Spectrum does not spread when “L” is set to ENS. The clock with low jitter can be obtained. Because of ENS has Pull-up

resistance, spectrum spread when “H” is set to it or open the terminal.

SEL0, SEL1 Modulation Rate Setting

SEL1

SEL0

Modulation Rate

L

L

± 1.5%

L

H

± 0.5%

H

L

− 1.0%

H

H

− 3.0%

Note : The modulation rate can be changed at the level of the terminal.

Modulation Type

Center spread

Center spread

Down spread

Down spread

Document Number: 002-08311 Rev. *B

Page 8 of 26

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