CMR250T
(2,000pcs/reel)
FEATURES:
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
CM250T
Conditions
Nominal frequency
f
0
30kHz to165kHz
Frequency tolerance
delta
f/f
0
30ppm
At 25C
Frequency
vs.Temperature
Characteristics
delta
f/f
0
See drawing
-10C to +60C
Turnover temperature
Tm
25C 5C
Temperature
coefficient
beta
-0.034 0.006ppm/C
2
Operating temperature
range
T
opr
-40C to + 85C
Storage temperature
range
T
stg
-55C to +125C
Equivalent series
resistance
R
1
35k ohm to 50k ohm
At 25C
Load capacitance
C
L
12.5pF TYP.
Please specify
Motional capacitance
C
1
0.001 to 0.004pF TYP.
Shunt capacitance
C
0
0.8 to1.7pF TYP.
Capacitance ratio
gamma
425 to 800 TYP.
Drive level
DL
1 W MAX.
Insulation resistance
IR
500M ohm MIN.
DC100V 15V
Aging (First year)
delta
f/f
0
5ppm MAX.
25C 3C
Sealing
1 x 10
-2
Pam
3
/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 2
Citizen Crystals and Oscillators - CMR250T
4/2/2003
http://www.citizencrystal.com/quartz/crystals/cmr250t_d.htm
DIMENSIONS: (UNIT=mm)
RECOMENDED SOLDERING PATTERN: (UNIT=mm)
Page 2 of 2
Citizen Crystals and Oscillators - CMR250T
4/2/2003
http://www.citizencrystal.com/quartz/crystals/cmr250t_d.htm
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