ALFT-04-2 - ABRACON

ALFT-04-2 Frequently Asked Questions (FAQs)

• What is the recommended PCB land pattern for the ALFT-04-2?
  Abracon recommends a land pattern with a minimum pad size of 1.3mm x 0.8mm and a non-solder mask defined (NSMD) pad shape to ensure reliable soldering and minimize thermal resistance.
• How do I handle the crystal's sensitivity to vibration and shock?
  To minimize the impact of vibration and shock, ensure the crystal is mounted securely to the PCB using a suitable adhesive or mechanical fastening method. Additionally, consider using a vibration-dampening material or a shock-absorbing mounting system to reduce mechanical stress on the crystal.
• What is the maximum operating temperature range for the ALFT-04-2?
  While the datasheet specifies an operating temperature range of -20°C to +70°C, Abracon recommends derating the crystal's frequency tolerance and stability above 60°C to ensure reliable operation.
• Can I use the ALFT-04-2 in a humid or high-moisture environment?
  The ALFT-04-2 is not hermetically sealed, so it's not recommended for use in humid or high-moisture environments. If exposure to moisture is unavoidable, consider using a conformal coating or potting the crystal to protect it from moisture ingress.
• How do I ensure the crystal's frequency accuracy and stability over time?
  To maintain frequency accuracy and stability, ensure the crystal is driven at the recommended load capacitance and voltage, and that the oscillator circuit is designed to minimize noise and interference. Additionally, consider using a crystal with a tighter frequency tolerance and aging specification, such as the ALFT-04-2's ±10 ppm option.