Crystal 27.000MHz 30ppm 20pF 40Ω HC-49U
This component is an HC-49UX quartz crystal, a through-hole electronic component designed to generate a highly stable and precise frequency. It utilizes a quartz crystal resonator that mechanically vibrates at a specific target frequency when an electrical signal is applied, in this case, 27.000 MHz. This fundamental physical property makes it an excellent timing reference for creating stable clock signals in electronic circuits.
The crystal’s performance is defined by its key parameters. The 20pF load capacitance specifies the external capacitance required for the oscillator circuit to run at the exact rated frequency. Its frequency stability is guaranteed to be within ±30 parts per million (ppm) over the operating temperature range, meaning the frequency drift is minimal. Furthermore, it has a low equivalent series resistance (ESR) of 40 ohms at its frequency, indicating high efficiency and quality.
Housed in the standardized HC-49UX metal package, the component is designed for resistance welding, which ensures a robust and hermetic seal to protect the sensitive quartz wafer inside from contaminants and moisture. The package is finished with a lead-free RoHS-compliant coating and is rated Moisture Sensitivity Level (MSL) 1, making it robust for storage and assembly. This construction contributes to its excellent long-term aging characteristic of only ±5 ppm per year.
