CitizenCrystalsandOscillators-CFS
 CFS-308,CFS-206,CFS-145
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.
APPLICATIONS:
●Usedasaclocksourceforcommunicationequipment,
AVequipment,OAequipment,measuringinstruments
andvarioustypesofclocks
STANDARDSPECIFICATIONS
Item CFS-308 CFS-206 CFS-145 Conditions
Nominalfrequency f032.768KHz
Frequencytolerance deltaf/
f0±20ppm (25°C)
Reference
temperature
Frequencyvs.
Temperature
Characteristics
deltaf/
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 -10°Cto+60°C
Storagetemperature
range Tstg -40°Cto+85°C
Qualityfactor Q 90,000
TYP. 70,000TYP 80,000TYP.
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CitizenCrystalsandOscillators-CFS
Equivalentseries
resistance R135KohmMAX. 40Kohm
MAX.
Reference
temperature
(25°C)
Loadcapacitance CL12.5pFTYP. 8.0pFTYP. Pleasespecify
Motionalcapacitance C10.0035pF
TYP. 0.0030pF
TYP. 0.0025pF
TYP.
Shuntcapacitance C01.60pF
TYP 1.35pFTYP. 1.00pFTYP.
Capacitanceratio gamma 460TYP. 450TYP. 400TYP.
Drivelevel DL 1µWMAX.
Insulationresistane IR 500MohmMIN. DC100V±15V
Aging(Firstyear) deltaf/
f0±3ppmMAX. 25°C±3°C
Hermeticityofseal 1x10-2µPam3/sMAX.
Shockresistance ±5ppmMAX.
Droptestof3timesonaboardfrom75cmheightorshocktestof
3000Gx0.3msx1/2sinwavex3directions
FREQUENCYvsTEMPERATURECURVE
DIMENSIONS:(UNIT=mm)
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CitizenCrystalsandOscillators-CFS
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CitizenCrystalsandOscillators-CFS
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