CMR250T (2,000pcs/reel)
FEATURES:
zBecause of their excellent shock resistance and low power
consumption, the units are ideal for portable equipment.
zFeatures superior characteristics indigenous to tuning fork-type quartz
crystal units.
zIdeal for low cost SMD applications.
zProvided in Tape and Reel.
APPLICATIONS:
zPermits use as a clock source for communication equipment, AV
equipment, OA equipment, measuring instruments and pagers.
STANDARD SPECIFICATIONS
Item CM250T Conditions
Nominal frequency f030kHz to165kHz
Frequency tolerance delta f/f0± 30ppm At 25°C
Frequency
vs.Temperature
Characteristics
delta f/f0See 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 R135k ohm to 50k ohm At 25°C
Load capacitance CL12.5pF TYP. Please specify
Motional capacitance C10.001 to 0.004pF TYP.
Shunt capacitance C00.8 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
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DIMENSIONS: (UNIT=mm)
RECOMENDED SOLDERING PATTERN: (UNIT=mm)
Pa
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