CFS206 32.768KDZB-UB

## TUNING FORK CRYSTAL UNIT (Cylinder Type) 

RoHS compliant / Pb free 

## **・** CFS-206 CFS-145 

## ■ FEATURES 

- Frequency range : 32.768kHz 

- External dimensions (mm) CFS-206  Φ : 2.0 x L : 6.2 CFS-145  Φ : 1.5 x L : 5.1 

- Applications Watch / Clock / Security devices / Consumer products 

## ■ DIMENSION [mm] 

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CFS-206 CFS-145<br>**----- End of picture text -----**<br>


## ■ STANDARD SPECIFICATIONS 

|Model<br>Item|Model<br>Item|CFS-206|CFS-145|Conditions|
|---|---|---|---|---|
|**Nominal Frequency**|f0|32.768kHz|||
|**Frequency Tolerance**|Δf/f0|±5ppm / ±10ppm / ±20ppm||at 25℃|
|**Load capacitance**|CL|6.0pF / 7.0pF / 8.0pF / 12.5pF||Please specify<br>your requirement|
|**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|35KΩ Max.|40KΩ Max.|at 25℃|
|**Level of drive**|DL|1μW Max.|||
|**Aging (first year)**|Δf/f0|±3ppm Max.||25℃±3℃|
|**Shunt capacitance**|C0|1.2pF Typ.|1.0pF Typ.||



- ~~Oe~~ http://cfd.citizen.co.jp/english/prod tech/product/cvo_top.html 

## ■ PART NUMBERING SYSTEM 

## **CFS-206 / CFS-145   32768   D  Z  F  B  -  □□□** 

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Frequency Frequency Tolerance Frequency Tolerance over Package specification CITIZEN<br>（at 25℃) Operating Temp. Range management code<br>B Only Bulk<br>Please specify D ±20ppm (STD) Z Standard Spec. Ref. Code for<br>the frequency E ±10ppm internal use.<br>in Hz.<br>H ±5ppm Load capacitance (CL)<br>B 6.0pF<br>F 12.5pF (STD)<br>V 8.0pF<br>Y 7.0pF<br>**----- End of picture text -----**<br>


*Please contact us for specifications available. 

## ■ Part Marking [standard] 

## **CFS-206** 

**CFS-145** 

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22ym<br>#####<br>**----- End of picture text -----**<br>


22 : Manufacture's ID Code 

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No marking<br>**----- End of picture text -----**<br>


- y : The last digit of production year 

- m : Production month (See Table.1) 

# : Production Lot No. 

Table.1 Month Jan Feb … Sep Oct Nov Dec ~~ae eeee~~ Code 1 2 … 9 X Y Z ~~ee eeee~~ 

## ■ Handling Notes 

## **Mounting** 

Soldering the body of cylinder type crystal unit must be strictly avoided as it may cause significant deterioration in characteristics of the product. 

Rubber adhesive is recommended for mounting. 

## **Bending Lead** 

Hold the body of crystal unit by hand, and the part to be bent with tweezers leaving more than 1.5mm of lead from the body case.  (3.0mm is recommended) 

Bend the lead 90°holding with the tweezers. Pulling the lead strongly may crack the hermetic seal glass at the root of the lead and may cause the airtightness and the characteristics to deteriorate. 

Rev.1 

- http://cfd.citizen.co.jp/english/prod tech/product/cvo_top.html