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| Citizen Crystals and Oscillators - CMR250T Page 1 of 2 CMR250T FEATURES: (2,000pcs/reel) Because of their excellent shock resistance and low power consumption, the units are ideal for portable equipment. Features superior characteristics indigenous to tuning fork-type quartz crystal units. Ideal for low cost SMD applications. Provided in Tape and Reel. APPLICATIONS: Permits use as a clock source for communication equipment, AV equipment, OA equipment, measuring instruments and pagers. STANDARD SPECIFICATIONS Item Nominal frequency Frequency tolerance Frequency vs.Temperature Characteristics Turnover temperature Temperature coefficient Operating temperature range Storage temperature range Equivalent series resistance Load capacitance Motional capacitance Shunt capacitance Capacitance ratio Drive level Insulation resistance Aging (First year) Sealing Shock resistance CM250T Conditions At 25C -10C to +60C f0 delta f/f0 delta 30kHz to165kHz 30ppm See drawing f/f0 Tm beta 25C 5C -0.034 0.006ppm/C2 -40C to + 85C -55C to +125C 35k ohm to 50k ohm 12.5pF TYP. 0.001 to 0.004pF TYP. 0.8 to1.7pF TYP. 425 to 800 TYP. 1 W MAX. 500M ohm MIN. 5ppm MAX. 1 x 10-2 Pa*m3 /s MAX. DC100V 15V 25C 3C At 25C Please specify Topr Tstg R1 CL C1 C0 gamma DL IR delta f/f0 5ppm MAX. Drop test of 3 times on a hard board from 75cm height or shock test of 3000G x 0.3ms x 1/2sin wave x 3 directions FREQUENCY vs TEMPERATURE CURVE http://www.citizencrystal.com/quartz/crystals/CMR250T_d.htm 4/2/2003 Citizen Crystals and Oscillators - CMR250T Page 2 of 2 DIMENSIONS: (UNIT=mm) RECOMENDED SOLDERING PATTERN: (UNIT=mm) http://www.citizencrystal.com/quartz/crystals/CMR250T_d.htm 4/2/2003 |
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