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 cx18sm crystals are designed for applications where miniaturization is paramount. the rugged crystal is ideally suited for a wide variety of high frequency applications including medical electronics, cardiac rhythm management, pacemakers for example. also auitable for cochlear implants, infusion pumps and wildlife tracking. features ultra-miniature smd package 1.55 x 0.95 x 0.35mm frequency range 30mhz ~ 50mhz high shock and vibration resistance hermetically sealed available with glass or ceramic lid tight calibration tolerance custom designs available cx18sm at crystal ultra-miniature smd crystal 30mhz to 50mhz how to order cx18sm at crystals cx18 - s - _ - sm1 - 50.0m, 100 / 100 / - / i 's' if special, custom design. otherwise leave blank blank = glass lid 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 cx18sm at crystals are available either tray packed (<250pcs) or tape and reel (>250 pieces). 12mm tape, 178mm or 330mm reels (eia 418). specifications stated are typical at 25c unless otherwise indicated. specifications may change without notice. specification 1. other tolerances available, contact euroquartz sales 2. does not include calibration tolerance. (frequency stability characteristics follow that of the at-cut thickness-shear mode.) 3. per mil-std-202g, method 204d, condition d. random vibration testing also available. standard calibration tolerance 1 : 100ppm or tighter as required. load capacitance: 10pf ( or as specified ) drive level: 200w maximum frequency stability 1,2 -10 to +70c: 50ppm to 10ppm -40 to +85c: 100ppm to 20ppm -55 to +125c: 100ppm to 30ppm ageing, first year: 5ppm maximum (better than 1ppm available) shock, survival: 5000g, 0.3ms, ? sine vibration, survival 3 : 20g rms, 10~2000hz swept sine 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 outline & dimensions terminations sm1 = gold plated * sm2 = solder plated sm3 = solder dipped sm4 = solder plated * sm5 = solder dipped * * = lead free fundamental frequency: 50.0mhz motional resistance r (): 60 motional capacitance c1 (ff): 1.2 qualityfactor q (k): 44 shunt capacitance c0 (pf): 0.6 sm1 0.35 sm2 0.37 sm3 0.42 sm4 0.37 sm5 0.42 glass lid dim. h terminations - plating sm1 gold plated (lead free) sm2 solder plated sm3 solder dipped sm4 solder plated (lead free) sm5 solder dipped (lead free) designation termination
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