MB88155 데이터 시트보기 (PDF) - Fujitsu

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MB88155

Spread Spectrum Clock Generator

Fujitsu 

MB88155

■ PIN SETTING

The modulation clock requires stabilization wait time after the PIN setting is changed. For the modulation clock

stabilization wait time, assure the maximum value for “Lock-up time” in the AC Characteristics list in

“■ ELECTRICAL CHARACTERISTICS”.

ENS modulation enable setting

ENS

L

H

No modulation

Modulation

Modulation

MB88155-xx0, xx1

Note : Spectrum does not diffuse when “L” is set to ENS pin.

MB88155-xx2, xx3 do not have ENS pin.

XPD power down

XPD

Status

L

Power down status

H

Operating status

MB88155-xx2, xx3

Note : When setting “L” to XPD pin, it becomes power down mode (low power consumption mode) .

Both CKOUT and REFOUT of output pins are fixed to “L” output during power down.

MB88155-xx0, xx1 do not have XPD pin.

SEL modulation rate setting

SEL

L

H

± 0.5%

− 1.0%

± 1.0%

− 2.0%

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

Frequency

MB88155-x1x

MB88155-x0x

MB88155-x1x

MB88155-x0x

8

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