Created by alexarnaut on Dec 19, 2008 12:00 AM. Last modified by alexarnaut on Jun 28, 2011 11:49 PM.
Question: What are the acceptable voltage levels for the CMOS XTAL inputs?
The level required at XTALIN is +/- 1 Volt centered around VDD/2. This is the tolerance that we suggest, essentially the comparison of the reference and feedback signal is done at the rising edges at VDD/2 level.