Quartz crystal resonator (often identified as Xtal, Extenal Crystal Osillator, external crystal oscillator, because the crystal
unit is often used as an external circuit), referred to as quartz crystal or crystal oscillator, uses the piezoelectric effect of
quartz crystal (also known as crystal) to generate An electronic component with high-precision oscillating frequency is a passive
component. The component is mainly composed of quartz wafer, base, shell, silver glue, silver and other components. According to the lead condition, it can be divided into two types: in-line (with lead) and surface mount (without lead).