1.9 Crystal Oscillator Routing and Placement

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

• The crystal trace (XON/XOP) must 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 must be connected to the ground plane through Vias directly.
• Place the external load capacitors as close as possible to the crystal.