49S晶振 HC-49US 10MHz 20pF ±10PPM
49S晶振 HC-49US 11.0592MHz 20pF ±20PPM
49S晶振 HC-49US 12.288MHz 20pF ±20PPM
49S晶振 HC-49US 12MHz 20pF ±10PPM
49S晶振 HC-49US 12MHz 20pF ±20PPM
49S晶振 HC-49US 13.560MHz 20pF ±20PPM