X21 EUROQUARTZ | Alldatasheet
Document overview
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Technical content
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE EURO QUARTZ 2.0 x 1.6 x 0.6mm SMD
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. 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 Frequency Range AT-Cut Fundamental: 20.0MHz to 54.0MHz Calibration Tolerance at 25ºC: ±10ppm, ±20ppm or ±30ppm Frequency stability -10° to +60°C from ±5ppm (contact Euroquartz) -20° to +70°C from ±10ppm -40° to +85°C from ±15ppm Storage Temperature: -50°~+105°C Equivalent Series Resistance: See table Shunt Capacitance (C0): 2pF to 4pF typical, 5pF maximum Load Capacitance (CL): Series or from 8pF to 32pF Ageing: <±3ppm per year at +25°C Drive level: 10 µW typ., 100 µW max. Reflow Soldering: 10s maximum at 260°C twice or 180s at 230°C, once. Packaging: EIA tape and reel SPECIFICATION EQUIVALENT SERIES RESISTANCE PART NUMBER GENERATION Part numbers for X21 crystals are generated as follows: 24.000MHz X21/10/30/-10+60/12pF/80R X21 CRYSTALS 20.0~30.0 120 30.1~54.0 80 Frequency Range MHz ESR Ω Max. 20.0MHz to 54.0MHz Example: Nominal Frequency Package Calibration tolerance at 25°C (±ppm) Temperature Stability over temp. range (±ppm) Operating Temp. Range (°C) (Lower and upper limits) Load Capacitance (Either SR for series or CL in pF) Equivalent Series Resistance (Optional - use when special value is required) Note: The entire crystal package may be grounded via the top metal lid and pads 2 and 4 on the underside of the unit.