X4918 EUROQUARTZ | Alldatasheet
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EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE EURO QUARTZ X4918 SERIES CRYSTALS
DESCRIPTION
X4918 crystals provide 32.768kHz in an ultra-miniature package. The part is designed to provide a small component size for real-time clock applications. The micro-miniature size and rugged construction make them ideal for real time clocks and battery powered, hand-held equipment. OUTLINE & DIMENSIONS Nominal Frequency: 32.7680kHz Calibration Tolerance at 25ºC: ±20ppm ±30ppm (standard) ±50ppm Crystal Cut: XY-cut Load Capacitance (CL): 12.5pF, 9.0pF or 7.0pF Equivalent Series Resistance (ESR): 65k W typical, 70kW max. Drive level: 1.0 mW max. Temperature Coefficient: -0.034ppm/°C 2 (Parabolic) Turnover Temperature: +25°±5°C Quality Factor: 40,000 min. Shunt Capacitance: 1.3pF typical Motional Capacitance: 21fF typical Capacitance Ration: 619 typical Ageing: ±3ppm/year max. Insulation Resistance: 500M W minimum @100VDC Operating Temperature Range: -40° to +85°C Storage Temerature Range: -55° to +125°C Reflow Soldering: 10s max. at 250°C ±10°C Shock Resistance: ±5ppm max, free drops x3 from 75cm height onto hard wood surface. Packaging: 12.0mm EIA tape, 4.0mm pitch, 180mm diameter reel, 3k pieces/reel SPECIFICATION PART NUMBER AND SPECIFICATION STABILITY OVER TEMPERATURE X-Cut Crystal 4.9 x 1.8 x 1.0mm Miniature SMD Ultra-miniature ceramic package 4.9 x 1.8 x 1.0mm RoHS compliant and lead free Low ageing, high shock and vibration resistance Uses include battery operated equipment Order part number: 32.768kHz X4918/30/--/-40+85/12.5pF This provides a 32.768kHz crystal in X3215 package with ±20ppm calibration tolerance at 25°C, temperature stability according to the above parabolic coefficient at a load capacitance of 12.5pF. Options: Calibration Tolerance: ±20ppm ±30ppm (standard) ±50ppm Load Capacitance: 7.0pF 9.0pF 12.5pF (standard) 32.768kHz