The crystal resonator (32.768KHz) is a passive electronic component that utilizes the piezoelectric effect of quartz crystal to generate a highly accurate oscillating frequency. It is primarily used in timing circuits.

Crystal (MHz) is a passive electronic component that utilizes the piezoelectric effect of quartz crystal to generate a high-precision oscillation frequency. It is used to provide reference clock source.

Crystal oscillator (SPXO) is an active device that integrates crystal and oscillating circuit. It can output CMOS or differential frequency signal to provide reference clock source.

TCXO is a quartz crystal oscillator, which compensates the frequency offset caused by the change of ambient temperature through the temperature compensation circuit to realize high-precision frequency output.

OCXO is a crystal oscillator that uses a constant temperature bath to keep the temperature of quartz crystal constant and minimizes the change of oscillator output frequency caused by the change of ambient temperature.

The clock module integrates crystal oscillator and compensation algorithm. It refers to the external clock source, tames the local clock, quickly synchronizes the frequency and phase, and enters the hold mode after the reference source is lost.