Generally speaking, crystal oscillators are the core components of a system. The quality of the crystal oscillator directly affects the stability of the entire system. The main points to note are as follows.

One is high-temperature reflow soldering. As the crystal oscillator is a physical device, high temperatures during reflow soldering may have a certain impact on the frequency of the crystal oscillator, deviating from the core frequency. This requires special attention when using K-level crystal oscillators.

One is ultrasonic cleaning in the cleaning process, which mainly refers to the possibility of resonance of the crystal oscillator if the ultrasonic frequency falls on the working frequency of the crystal oscillator, causing the chips inside the crystal oscillator to shatter and produce defects.

In general, it is important to ensure that the crystal oscillator operates in a stable state. Many cases of crystal oscillator failure are caused by long-term operation of the crystal oscillator in an over driven or under driven state. This can be analyzed by examining the output pin waveform of the crystal oscillator. Overdrive may lead to the crystal oscillator not reaching its normal service life, while underdrive may weaken the crystal oscillator's anti-interference ability, and the system often loses its clock without reason.