PL611S-27 Datasheet, PDF (7/9 Pages) PhaseLink Corporation – 1.8V to 3.3V PicoPLLTM Programmable Clock

P (Preliminary) L611s-27
1.8V to 3.3V PicoPLL^TM Programmable Clock
Crystal Tuning Circuit
Series and parallel capacitors used to fine tune the crystal load to the circuit load .
Crystal
Cst
XIN
1
Cpt
XOUT
8
Cpt
CST – Series Capacitor, used to lower circuit load to match crystal load . Raises frequency
offset. This can be eliminated by using a crystal with a Cload of equal or greater value than the
oscillator.
CPT – Parallel Capacitors , Used to raise the circuit load to match the crystal load. Lowers
frequency offset .
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