資料來源:https://www.sparkfun.com/products/539
Standard frequency crystals - use these crystals to provide a clock input to your microprocessor. Rated at 20pF capacitance and +/- 50ppm stability. Low profile HC49/US Package.
標準頻率晶體 - 使用這些晶體提供時鐘輸入您的微處理器。在20pF的電容和+/- 50ppm的穩定評級。低調HC49 /美包。