Hey,
In a reference design of an IC, they used the following crystal:
XTL OSC 4.0960MHZ HC49S 50ppm 50pF.
(-------- Frequency-Case--Tol.----load cap.).
Since we couldnt find such crystal on market, we used a crystal with the following spec:
4.096MHz (frequency).
20ppm (tolerance).
18pF (load capacitance).
The IC worked fine.
How come we exceeded the required spec. (18pF instead of 50pF), but it still works?
Is it something with crystals' load capacitance that has small effect on the IC's performance?
Thanks.
In a reference design of an IC, they used the following crystal:
XTL OSC 4.0960MHZ HC49S 50ppm 50pF.
(-------- Frequency-Case--Tol.----load cap.).
Since we couldnt find such crystal on market, we used a crystal with the following spec:
4.096MHz (frequency).
20ppm (tolerance).
18pF (load capacitance).
The IC worked fine.
How come we exceeded the required spec. (18pF instead of 50pF), but it still works?
Is it something with crystals' load capacitance that has small effect on the IC's performance?
Thanks.