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Ultra compact SMD packages
This is a crystal device that a crystal chip is enclosed in a package. Crystal units can be classified into tuning fork crystal units, AT crystal units, or SAW resonators, depending on the type of crystal chip used.
Thin & small suited to high-density mounting
A crystal oscillator is a crystal device that is able to output a specified frequency because a crystal oscillator and a crystal oscillation circuit (IC) are incorporated into a single package.
High-stability with built-in timestamp
A real time clock is a circuit or IC that generates digital data for times and dates, etc. from a reference clock. Usually, the reference clock is a 32,768kHz crystal unit