MB88154A データシートの表示（PDF） - Cypress Semiconductor

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MB88154A

Spread Spectrum Clock Generator

Cypress Semiconductor 

MB88154A

7. Pin Setting

SEL 0, SEL 1 Modulation Rate Setting

Modulation Rate

SEL1

SEL0

MB88154A-103

MB88154A-112, MB88154A-113

L

L

L

H

H

L

Down Spread

− 1.0%

− 2.0%

− 3.0%

Center Spread

± 0.5%

± 1.0%

± 1.5%

H

H

No spread

No spread

Notes:

■ The modulation rate can be changed at the level of the pin. Spectrum does not spread when “H” level is set to SEL0 and SEL1 pins.

The clock with low jitter can be obtained.

■ When changing the modulation rate 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”.

Center Spread

Spectrum is spread (modulated) by centering on the input frequency.

Radiation level

Modulation width 3.0%

−1.5%

+1.5%

Input frequency

Modulation rate center spread example of ± 1.5%

Frequency

Document Number: 002-08252 Rev. *B

Page 7 of 23

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