guides
PCB Layout Guidelines for Crystal Oscillators
Proper PCB layout is critical for crystal oscillator performance. This guide covers best practices for placement, routing, and grounding.
Place the crystal close to the IC, typically within 10mm. Keep traces short and symmetrical for differential oscillators.
Use a solid ground plane under the crystal area. Avoid high-speed signals near crystal traces to prevent coupling.
For load capacitors, place them close to the crystal pins. Use matching capacitors for better frequency accuracy.
Frequently Asked Questions
1. How close should the crystal be to the MCU?
Keep the crystal within 10-20mm of the MCU. Shorter traces reduce parasitic capacitance and improve stability.
💡 Decision Guide: Place crystal as close as possible to MCU within layout constraints.