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 cx-2 at crystals are designed in a rugged, ceramic package. due to its robust design this crystal has gained wide acceptance in the industry. features low profile, hermetically sealed ceramic package excellent ageing characteristics high shock resistance full military testing available available with glass or ceramic lid custom designs available specification fundamental frequency: 10.0mhz 32.0mhz 155.52mhz motional resistance r (): 60 20 50 motional capacitance c1 (ff): 2.8 7.8 0.5 qualityfactor q (k): 95 36 41 shunt capacitance c0 (pf): 1.4 2.4 3.2 calibration tolerance 1 : a = 0.01% (100ppm) b = 0.1% c = 1% load capacitance: 20pf ( unless specified by customer ) drive level: 500w maximum temperature stability 2 commercial -10 ~ +60c: from 10ppm industrial -40 to +85c: from 20ppm military -55 to +125c: from 30ppm ageing, first year: 5ppm maximum shock, survival 3 : 3,000g, 0.2ms, ? sine vibration, survival: 20g, 10~2000hz random operating temperature range commercial: -10 to +70c industrial: -40 to +85c military: -55 to +125c storage temperature range: -55 to +125c maximum process temperature: see package handling notes specifications stated are typical at 25c unless otherwise indicated. specifications may change without notice. note: the characteristics of the frequency temperature stability follow that of at-cut thickness shear mode. 1. tighter tolerances available. 2. does not include calibration tolerance. 3. higher shock version available how to order cx-2 leaded crystals cx-2 - s - ot - c - 03 - 32mhz, a / 25 / i 's' if special, custom design. otherwise leave blank blank = glass lid c = ceramic lid side leads frequency k = khz m = mhz calibration tolerance @25c a b c temp. range c = -10 ~ +70c i = -40 ~ +85c m = -55 ~ +125c s = customer specified ot = 3rd overtone mode. blank = fundamental mode frequency stability over temp. (in ppm) cx-2 crystal low profile miniature crystal 9.6mhz to 160mhz outline & dimensions package handling the cx crystal is hermetically sealed in a ceramic package. normal handling and soldering precautions for small, low thermal mass parts are adequate when installing or testing cx crystals. cx crystals may be wave soldered with proper precaution taken to avoid desoldering the leads. a slow machine rate or too high a pre-heat temperature or solder bath temperature may damage the crystals. lead to package solder interface temperature should not exceed 175c, glass lid to package seal rim temperature should not exceed 210c . if the seal rim reaches temperatures above the maximum specified, the package may lose its hermeticity. loss of hermeticity results in a frequency decrease and motional resistance increase.
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