EURO QUARTZ X21 CRYSTALS 20.0MHz to 54.0MHz 2.0 x 1.6 x 0.6mm SMD Frequency range 20MHz to 54MHz, fundamental mode Ultra-miniature package 2.0 x 1.6 x 0.6mm Packaged in standard EIA tape and reel Exceptionally low ageing High shock and vibration resistance Ideal for PDAs, hand-held GPS, PCMCIA etc. OUTLINE & DIMENSIONS DESCRIPTION X21 crystals are ultra-miniature AT-cut crystals covering the frequency range 20MHz to 54MHz in fundamental mode. Their exceptionally small size (2.0 x 1.6mm) and low mass coupled with high shock and vibration resistance makes these crystals ideal for miniaturized handheld equipment and similar high-density applications. SPECIFICATION Frequency Range AT-Cut Fundamental: Calibration Tolerance at 25ºC: Frequency stability -10° to +60°C -20° to +70°C -40° to +85°C Storage Temperature: Equivalent Series Resistance: Shunt Capacitance (C0): Load Capacitance (CL): Ageing: Drive level: Reflow Soldering: Packaging: 20.0MHz to 54.0MHz ±10ppm, ±20ppm or ±30ppm from ±5ppm from ±10ppm from ±15ppm -50°~+105°C 2pF to 4pF typical, 5pF maximum Series or from 8pF to 32pF <±3ppm per year at +25°C 10 µW typ., 100 µW max. 10s maximum at 260°C twice or 180s at 230°C, once. EIA tape and reel PART NUMBER GENERATION EQUIVALENT SERIES RESISTANCE Frequency Range MHz ESR Ω Max. 20.0~30.0 30.1~54.0 120 80 Part numbers for X21 crystals are generated as follows: Example: 20.000MHz X21/10/30/-10+60/12pF/80R Nominal Frequency Package Calibration tolerance at 25°C (±ppm) Temperature Stability over temp. range (±ppm) Operating Temp. Range (°C) Load Capacitance Equivalent Series Resistance EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk