Crystals

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Type	Frequency	Frequency Stability	Frequency Tolerance	Load Capacitance	ESR (Equivalent Series Resistance)	Operating Mode	Operating Temperature	Ratings	Mounting Type	Package / Case	Size / Dimension	Height - Seated (Max)

FC4STCBMF12.0 CRYSTAL 12.0000MHZ 20PF TH Fox Electronics	13,308 In Stock	1 : £0.27000 Bulk	HC49SLF	Bulk	Active	MHz Crystal	12 MHz	±50ppm	±30ppm	20pF	60 Ohms	Fundamental	-20°C ~ 70°C	-	Through Hole	HC-49/US	0.447" L x 0.183" W (11.35mm x 4.65mm)	0.142" (3.60mm)
830108212509 WE-XTAL QUARTZ CRYSTAL 25.0 MHZ; Würth Elektronik	588 In Stock	1 : £0.37000 Cut Tape (CT) 3,000 : £0.25539 Tape & Reel (TR)	IQXC-42	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	MHz Crystal	25 MHz	±15ppm	±10ppm	8pF	100 Ohms	Fundamental	-40°C ~ 85°C	-	Surface Mount	4-SMD, No Lead	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.020" (0.50mm)

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Crystals

Crystal products are passive components most commonly used as time or frequency references in electronic systems. Consisting of a piezoelectric crystal that mechanically vibrates at a known frequency, their use requires provision of an external oscillator circuit with carefully designed capacitance, drive voltage, and series resistance characteristics, to generate a signal at the indicated crystal frequency that operates successfully over the operating temperature range, without damaging the crystal element. Active devices which integrate this additional necessary circuitry are considered oscillators and are catalogued separately.