2.9 Crystal Oscillator Routing and Placement

To ensure low noise and frequency precision, the crystal oscillator layout placement is listed as below:

• The crystal trace (XON/XOP) should be as short as possible and the width must be wider than 7 mils.
• The ground plane at the ground layer must be larger than the crystal size and the external load capacitor’s ground needs to be connected to ground plane through Vias directly.
• The external load capacitors must be placed as close as possible to the crystal.