The miniature CX-1H-SM quartz crystal is a high quality tuningfork resonator for use in series (two cascaded inverters) oscillators. The CX-1H-SM is hermetically sealed in a rugged, leadless ceramic package. The crystal has been designed for surfacemounting on printed circuit boards or hybrid circuits. The CX-1-SM crystal is manufactured using a photo-lithographic process, yielding consistently high quality production parts.