I have been using resonators since I started with PICs and now need to start using crystals. I have a few questions on how to pick them.
Microchip PIC16F87XA datasheet
How do I know these are parallel cut crystals? Can I assume this to be true because they are "MICROPROCESSOR crystals".
Given these choices, for the best stability should I choose a 20MHZ crystal with a 20pF Load Capacitance and use it with 20pF caps?
What does it mean when they list "Series" instead of a pF value?
Microchip PIC16F87XA datasheet
On Mouser I searched for 20MHZ microprocessor crystals in the H-49 package and found several with 10 - 20pF Load Capacitance.The PIC16F87XA
oscillator design requires the use of a parallel cut crystal. Use of a series cut crystal may give a frequency out of the crystal manufacturer’s specifications.
...
20 MHz 15-33 pF 15-33 pF for C1 and C2 (crystal caps)
...
Note 1: Higher capacitance increases the stability
of oscillator but also increases the start-up
time.
How do I know these are parallel cut crystals? Can I assume this to be true because they are "MICROPROCESSOR crystals".
Given these choices, for the best stability should I choose a 20MHZ crystal with a 20pF Load Capacitance and use it with 20pF caps?
What does it mean when they list "Series" instead of a pF value?