EURO QUARTZ 7 x 5mm SMD, 4 pad or 2 pad FEATURES · MQ & MQ2 CRYSTALS Miniature size: 7.0mm x 5mm x 1.2mm height Gold-plated ceramic base with metal seam-welded lid To minimize EMI the whole crystal may be grounded Tight tolerance of ±10pppm for telecommunications use High shock and vibration resistance Ideal for PDAs, GPS, PCMCIA and hand-held equipment OUTLINE & DIMENSIONS MQ DESCRIPTION Miniature surface-mount MQ crystals are produced using a ceramic substrate and fitted with a hermetically-sealed metal lid. The crystals are competitively priced, well-suited to mass-market electronic applications and may also be produced to close tolerances making this crystal a good choice for applications requiring low mass and tight tolerances. There are two package variants, 4 pad and two pad. SPECIFICATION Frequency Range AT-Cut Fundamental: AT-Cut 3rd Overtone: Calibration Tolerance at 25ºC*: Frequency stability -10° to +60°C -20° to +70°C -40° to +90°C -55 to +125°C Storage Temperature: Effective Series Resistance: Shunt Capacitance (C0): Load Capacitance (CL): Ageing: Drive level: Reflow Soldering: Package: Packaging: 6.0MHz to 45.0MHz 30.0MHz to 125.0MHz from ±5ppm (±10, ±20 or ±30ppm standard) from ±5ppm from ±10ppm from ±15ppm from ±20ppm -55°~+105°C See table 2pF to 4pF typical, 7pF maximum Series or from 10pF to 32pF (Customer specified CL) <±3ppm per year at +25°C 100 mW maximum 10s maximum, 260°C twice or 180s at 230°C, once. Ceramic base, metal lid, Hermetic seal 16mm EIA tape and reel 1000 pieces per reel EFFECTIVE SERIES RESISTANCE Frequency Crystal Cut/ ESR Range MHz Mode Ohms Max. 6.0 ~ 11.0 AT Fund. 60 11.1 ~ 14.0 AT Fund. 50 14.1 ~ 45.0 AT Fund. 40 30.0 ~ 40.0 AT 3rd OT 100 40.1 ~ 50.0 AT 3rd OT 80 50.1 ~ 125 AT 3rd OT 90 MQ2 PART NUMBER GENERATION Example: 12.000MHz MQ/20/30/-10+60/18pF/60R Nominal Frequency Package (MQ = 4 pad, MQ2 = 2 pad 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) EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: [email protected] www.euroquartz.co.uk