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MB15C02 Datasheet, PDF (10/25 Pages) Fujitsu Component Limited. – Single Serial Input PLL Frequency Synthesizer On-Chip prescaler | |||
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MB15C02
(b) Charge pump
The charge pump is available in two forms: internal external.
Internal charge pump output (Do)
External charge pump outputs (ÏR, ÏP)
(c) Phase comparator input/output waveforms
The phase comparator outputs logic levels summarized in Table 1, according to the phase error between fr
and fp. Note that ÏP is an Nch open drain output. The pulse width of the phase comparator outputs are identical
and equal to the phase error between fr and fp as shown in Figure 1.
fr
fp
When FC = âLâ
Do
ÏR
ÏP
When FC = âHâ
Do
ÏR
High Z
High Z
High Z
ÏP
High Z
High Z : High impedance state
fp : Nch open output
Figure 1. Phase comparator input/output waveform
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