MB15C700 Datasheet, PDF (8/18 Pages) Fujitsu Component Limited. – Built-in IF Band Voltage Controlled Oscillator Mask ROM Frequency Synthesizer

MB15C700 series
s PHASE COMPARATOR OUTPUT WAVE FORM
fr
fp
tWU
tWL
LD
PLLDo
"Z"
"Z" High impedance
Notes : • Phase error detection range : −2π to +2π
• Spikes on Do pulse during locking state are output to prevent dead zone
• LD output becomes “L” level when phase error is tWU or more.
• LD output becomes “H” level when phase error is tWL or less and continues to be so for three
cycles or more.
• tWU and tWL depend on OSCin input frequency.
tWU ≥ 8/fOSC [s] : i.e. tWU ≥ 625 ns, fOSC = 12.8 MHz
tWL ≤ 16/fOSC [s] : i.e. tWL ≤ 1250 ns, fOSC = 12.8 MHz
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