TUNING FORK CRYSTAL UNITS (Cylinder Type) CFS-206.CFS-145.CFV-206 ■ FEATURES 7Best suited for portable devices with low current consumption. 7For a clock source in digital equipment. Life-size 6.0±0.2 ø0.2±0.05 ø1.4±0.1 0.45±0.08 0.7±0.2 ø2.0±0.1 ø0.26±0.05 ■ DIMENSION [mm] 5.0±0.1 10.0±0.2 CFS-206, CFV-206 4.3±0.3 CFS-145 ■ STANDARD SPECIFICATIONS Item Nominal Frequency Frequency Tolerance Load capacitance Model CFS-206 CFS-145 CFV-206 Conditions f0 32.768kHz 30kHz∼100kHz Need to contact us for the available frequency in CFV-206 △ f/f0 ±20ppm ±30ppm at 25˚C 12.5pF Need to specify your requirement CL 12.5pF 8.0pF Operating Temperature Range TOPR −20℃∼＋70℃ Storage Temperature Range TSTR −40℃∼＋85℃ Turnover Temperature TM 25℃±5℃ Temperature Coefficient β −0.034±0.006ppm/℃2 Motional (series) resistance R1 Level of drive DL See figure 2 in P4 Aging (first year) 35KΩMax. 50KΩMax. at 25˚C ±5ppm Max. 25℃±3℃ 1μW Max. ±3ppm Max. △ f/f0 Quality Factor Q 70000 Typ. 85000 Typ. 70000∼100000 Typ. Depend on frequency Shunt capacitance C0 1.35pF Typ. 1.00pF Typ. 0.8∼1.7pF Typ. Depend on frequency http://cfm.citizen.co.jp/english/product/pr02.html 13 40KΩMax.