CMR250T CITIZEN | Alldatasheet
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Technical content
CMR250T (2,000pcs/reel) FEATURES: z Because of their excellent shock resistance and low power consumption, the units are ideal for portable equipment. z Features superior characteristics indigenous to tuning fork-type quartz crystal units. z Ideal for low cost SMD applications. z Provided in Tape and Reel. APPLICATIONS: z Permits use as a clock source for communication equipment, AV equipment, OA equipment, measuring instruments and pagers. STANDARD SPECIFICATIONS Item CM250T Conditions Nominal frequency f0 30kHz to165kHz Frequency tolerance delta f/f0 ± 30ppm At 25°C Frequency vs.Temperature Characteristics delta f/f0 See drawing -10°C to +60°C Turnover temperature Tm 25°C ± 5°C Temperature coefficient beta -0.034 ± 0.006ppm/°C2 Operating temperature range Topr -40°C to + 85°C Storage temperature range Tstg -55°C to +125°C Equivalent series resistance R1 35k ohm to 50k ohm At 25°C Load capacitance CL 12.5pF TYP. Please specify Motional capacitance C1 0.001 to 0.004pF TYP. Shunt capacitance C0 0.8 to1.7pF TYP. Capacitance ratio gamma 425 to 800 TYP. Drive level DL 1 µ W MAX. Insulation resistance IR 500M ohm MIN. DC100V ± 15V Aging (First year) delta f/f0 ± 5ppm MAX. 25°C ± 3°C Sealing 1 x 10-2 µ Pa·m3 /s MAX. Shock resistance ±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 Page 1 of 2Citizen Crystals and Oscillators - CMR250T 4/2/2003http://www.citizencrystal.com/quartz/crystals/cmr250t_d.htm
DIMENSIONS: (UNIT=mm) RECOMENDED SOLDERING PATTERN: (UNIT=mm) Page 2 of 2Citizen Crystals and Oscillators - CMR250T 4/2/2003http://www.citizencrystal.com/quartz/crystals/cmr250t_d.htm