euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 (0)1460 230000 fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk euro quartz description CX7SM crystals are leadless devices designed for surface mounting. the ultra-miniature crystals are hermetically sealed in a rugged, ceramic package. the crystals have a very low profile and small area. outline & dimensions features designed for infrared, vapour phase or epoxy mounting low profile, (<1.2mm) hermetically sealed ceramic package excellent ageing characteristics high shock and vibration resistance full military testing available available with glass or ceramic lid custom designs available CX7SM crystal ultra-miniature smd crystal 14mhz to 250mhz sm1 1.14 1.27 sm2 1.17 1.30 sm3 1.22 1.35 glass lid ceramic lid dim. h how to order CX7SM at crystals cx7 - s - c - sm1 - 49.0m, 50 / 50 / - / i 's' if special, custom design. otherwise leave blank blank = glass lid c = ceramic lid terminations sm1 = gold plated sm2 = solder plated sm3 = solder dipped frequency m = mhz calibration tolerance @25c (in ppm)* temp. range c = -10 ~ +70c i = -40 ~ +85c m = -55 ~ +125c s = customer specified frequency stability over temp. range (in ppm)* *alternative 'total' tolerance (in ppm) crystal equivalent circuit r1 motional resistance l1 motional inductance c1 motional capacitance c0 shunt capacitance packaging options CX7SM crystals are available either tray packed (<250pcs) or tape and reel (>250 pieces). 16mm tape, 178mm or 330mm reels (eia 418). specifications stated are typical at 25c unless otherwise indicated. specifications may change without notice. 49.0mhz motional resistance r1: 14k motional capacitance c1: 2.4ff quality factor q: 100,000 shunt capacitance: 0.8pf specification 1. other tolerances available, as low as 5ppm. 2. does not include calibration tolerance. (frequency stability characteristics follow that of the at-cut thickness-shear mode.) 3. higher shock version available. standard calibration tolerance 1 : 100ppm to 1000ppm load capacitance: 10pf ( or as specified ) drive level: 200w maximum frequency stability 2 -10 to +70c: 50ppm to 10ppm -40 to +85c: 100ppm to 35ppm -55 to +125c: 100ppm to 50ppm ageing first year: 5ppm maximum shock, survival 4 : 5000g peak, 0.3ms, ? sine vibration, survival: 20g rms, 10~2000hz random operating temperature range: -10c to +70c (commercial) -40c to +85c (industrial) -55c to +125c (military) storage temperature range: -55 to +125c maximum process temperature: +260c for 20 seconds terminations - plating sm1 gold plated sm2 nickel, solder plated sm3 nickel, solder plated and solder dipped designation termination
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