A 12.000 MHz Crystal Oscillator (HC-49S Low Profile Quartz Crystal) is a passive frequency-generating component designed to deliver highly stable, precise clock signals for digital circuits. Encapsulated in a hermetically sealed metal HC-49S package, it utilizes the mechanical resonance of a vibrating quartz crystal to produce an exact $12\text{ MHz}$ reference frequency. Paired with dual ceramic load capacitors in an oscillator circuit, it drives internal instruction timing for microcontrollers, USB controllers, and communication interfaces.

This product is featured by Famephase Electronic Accessories as an essential component for system clocking, timing reference circuits, microcontrollers, and embedded system design.