MB88153A データシートの表示（PDF） - Fujitsu

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MB88153A

Spread Spectrum Clock Generator

Fujitsu 

MB88153A

(Continued)

Parameter

Lock-up time

Cycle-cycle jitter

(Ta = − 40 °C to + 85 °C, VDD = 3.3 V ± 0.3 V, VSS = 0.0 V)

Symbol Pin

Conditions

Value

Unit

Min

Typ

Max

16.6 MHz to 80 MHz

tLK CKOUT

80 MHz to 134 MHz



2



3

5

ms

8

No load capacitance,

tJC CKOUT Ta = + 25 °C,

VDD = 3.3 V





100 ps-rms

Note : The modulation clock stabilization wait time is required after the power is turned on, the IC recovers from

power saving, or after FREQ (frequency range) or ENS (modulation ON/OFF) setting is changed. For the

modulation clock stabilization wait time, assign the maximum value for lock-up time.

<Definition of modulation frequency and number of input clocks per modulation>

f (Output frequency)

Modulation wave form

t

fMOD (Min)

fMOD (Max)

Clock count Clock count t

nMOD (Max)

nMOD (Min)

MB88153A contains the modulation period to realize the efficient EMI reduction.

The modulation period fMOD depends on the input frequency and changes between fMOD (Min) and fMOD (Max) .

Furthermore, the average value of fMOD equals the typical value of the electrical characteristics.

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