F235-24 datasheet by Fox Electronics

F235-24 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the F235-24?
  Fox Electronics recommends a 4-layer PCB with a solid ground plane, and a separate power plane for the oscillator circuit. Additionally, keep the oscillator circuit as close as possible to the crystal and away from noisy digital signals.
• How do I ensure the F235-24 oscillator starts reliably in a noisy environment?
  To ensure reliable startup, Fox Electronics recommends using a 1kΩ to 10kΩ pull-up resistor on the EN pin, and a 100nF to 1μF capacitor on the VDD pin to filter out noise. Additionally, ensure the power supply is stable and well-regulated.
• What is the maximum allowable crystal load capacitance for the F235-24?
  The maximum allowable crystal load capacitance for the F235-24 is 20pF. Exceeding this value may affect the oscillator's stability and frequency accuracy.
• Can I use the F235-24 with a third overtone crystal?
  Yes, the F235-24 can be used with a third overtone crystal, but it requires a specific layout and component selection. Fox Electronics recommends consulting their application notes and technical support for guidance on using third overtone crystals.
• How do I troubleshoot issues with the F235-24 oscillator not starting?
  To troubleshoot oscillator startup issues, check the power supply voltage, ensure the EN pin is properly biased, verify the crystal is properly connected and not damaged, and check for noise or interference on the oscillator circuit. If issues persist, consult Fox Electronics' technical support for further assistance.