MB88151A Просмотр технического описания (PDF) - Fujitsu

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MB88151A

Spread Spectrum Clock Generator

Fujitsu 

MB88151A

■ 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-100/200/400/500/800)

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.

XPD Power down setting (MB88151A-101/201/401/501/801)

XPD

Status

L

Power down Status

H

Operating status

Note : CKOUT of output pins are fixed to “L” output during power down.

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%

Modulation type

Center spread

Center spread

Down spread

Down spread

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

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