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IDT5V9888 데이터 시트보기 (PDF) - Integrated Device Technology

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IDT5V9888 3.3V EEPROM PROGRAMMABLE CLOCK GENERATOR IDT
Integrated Device Technology IDT
IDT5V9888 Datasheet PDF : 37 Pages
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IDT5V9888
3.3V EEPROM PROGRAMMABLE CLOCK GENERATOR
Modulation frequency:
FPFD = FIN / D (Eq. 11)
FVCO = FPFD * MNOM (Eq. 12)
FSSC = FPFD / (4 * Nssc * Tssc) (Eq. 13)
Spread:
ΣΔ = SD0 + SD1 + SD2 + … + SD11
the number of samples used depends on the NSSC value
ΣΔ ≤ 63 - SS_OFFSET
±Spread% =
ΣΔ * 100
(Eq. 14)
64 * (2*N[11:0] + A{3:0} + 1)
±Max Spread% / 100 = 1 / MNOM or 2 / MNOM (X2=1)
Profile:
Waveform starts with SS_OFFSET, SS_OFFSET + SDJ, SS_OFFSET + SDJ+1, etc.
INDUSTRIAL TEMPERATURE RANGE
Spread Spectrum Using Sinusoidal Profile
9
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