R26-32.768-6

CRYSTAL, 32.768KHZ, 6PF, 6.2 X 2.1MM DIA

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Manufacturer: RALTRON
Product type: Crystals
Frequency Nom:32.768kHz; Crystal Case:Cylinder Radial, 6.2mm x 2.1mm Dia; Frequency Stability + / -:-; Load Capacitance:6pF; Frequency Tolerance + / -:-; Prod 66K7156
SVHC: No SVHC (27-Jun-2024)
Frequency Nom: 32.768kHz
Product Range: R26 Series
Load Capacitance: 6pF
Crystal Case / Package: Cylinder Radial, 6.2mm x 2.1mm Dia
Frequency Stability + / -: -
Frequency Tolerance + / -: -
Operating Temperature Max: 60°C
Operating Temperature Min: -20°C

Delivery and price
Units per pack	2500
Price	0.063 €
Current stock	1000+
Lead time	30 days

Datasheet

## **TUNING FORK CRYSTAL UNITS** ~~RAMTROM~~ **FEATURES** _**SERIES R38, R26, AND R145**_ DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS _**3 x 8, 2 x 6, 1 x 5 mm**_ 

DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS 

## **SPECIFICATIONS** 

|||**_SERIES R38, R26, AND R145_**<br>**_3 x 8, 2 x 6, 1 x 5 mm_**<br>DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS<br>SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY<br>EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS<br>~~RAMTROM~~|**_SERIES R38, R26, AND R145_**<br>**_3 x 8, 2 x 6, 1 x 5 mm_**<br>DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS<br>SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY<br>EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS<br>~~RAMTROM~~|**_SERIES R38, R26, AND R145_**<br>**_3 x 8, 2 x 6, 1 x 5 mm_**<br>DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS<br>SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY<br>EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS<br>~~RAMTROM~~|**_SERIES R38, R26, AND R145_**<br>**_3 x 8, 2 x 6, 1 x 5 mm_**<br>DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS<br>SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY<br>EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS<br>~~RAMTROM~~|
|---|---|---|---|---|---|
|**HOLDER TYPE**|**R38**||**R26**|**R145**|**R38, R26**|
|NOMINAL FREQUENCY|32.768 kHz|32.768 kHz|32.768 kHz|32.768 kHz|30.00 kHz TO 153.6 kHz †|
|FREQUENCY TOLERANCE|±5  ±10  ±20 PPM|±5  ±10  ±20 PPM|±5  ±10  ±20 PPM|±5  ±10  ±20 PPM|±5  ±10  ±20 PPM|
|TURNOVER TEMPERATURE|25°C ±5°C|C|25°C ±5°C|25°C ±5°C|25°C ±5°C|
|PARABOLIC CURVATURE<br>CONSTANT(TYP) ††<br>~~i~~|-0.034 PPM/C²|-0.034 PPM/C²|-0.034 PPM/C²|-0.034 PPM/C²|-0.034 PPM/C²|
|LOAD CAPACITANCE †††<br>~~i~~<br>~~jf~~|6 or 12.5 pF<br>~~jffff~~|6 or 12.5 pF<br>~~fff~~|6 or 12.5 pF<br>~~fff~~|8.0 pF<br>~~fff~~|6 or 12.5 pF<br>~~fff~~|
|EQUIVALENT SERIES<br>RESISTANCE(MAX)<br>~~i~~<br>~~jf~~|35k OHM<br>~~jffff~~|35k OHM<br>~~fff~~|35k OHM<br>~~fff~~|40k OHM<br>~~fff~~|30k TO 50k OHM<br>~~fff~~|
|DRIVE LEVEL (TYP)<br>~~jf~~|1.0 µW<br>~~jffff~~||1.0 µW<br>~~fff~~|1.0 µW<br>~~fff~~|1.0 µW<br>~~fff~~|
|MOTIONAL CAPACITANCE (TYP)<br>~~jf~~|0.0035 pF<br>~~jf fff~~||0.003 pF<br>~~fff~~|0.0025 pF<br>~~fff~~|.001 TO .004 pF<br>~~fff~~|
|SHUNT CAPACITANCE (TYP)|1.6 pF||1.35 pF|1.0 pF|0.8 TO 1.7 pF|
|CAPACITANCE RATIO (TYP)|460||450|400|425 TO 800|
|AGING (FIRST YEAR MAX)|±3 PPM||±3 PPM|±3 PPM|±5 PPM|
|QUALITY FACTOR (TYP)|90000||70000|80000|FREQUENCY-PACKAGE SPECIFIC|
|INSULATION RESISTANCE (MIN)|500 M OHM||500 M OHM|500 M OHM|500 M OHM|
|OPERATING TEMPERATURE<br>RANGE<br>~~es~~|-20°C TO +60°C STANDARD<br>-40°C TO +85°C EXTENDED|||||
|STORAGE TEMPERATURE<br>RANGE<br>~~es~~|-40°C TO +85°C|||||
|SHOCK RESISTANCE<br>~~es~~<br>~~————~~|±5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SURFACE<br>OR 3000gx 0.3 ms x ½ SINEWAVE IN 3 AXES<br>~~————~~|||||
|STANDARD PART NUMBER<br>~~————~~|R38-32.768-12.5<br>~~————~~||R26-32.768-12.5<br>~~————~~|R145-32.768-12.5<br>~~————~~|SEE PART NUMBERING SYSTEM<br>~~————~~|



† COMMON FREQUENCIES ARE: 31.250 kHz, 31.500 kHz, 40.00 kHz, AND 76.800 kHz †† FREQUENCY DEVIATION AT T IS GIVEN AS: ∆ f/f = K(To - T)², WHERE K IS PARABOLIC CURVATURE CONSTANT ††† OTHER LOAD CAPACITANCES ARE AVAILABLE 

## **OUTLINE DRAWINGS** 

**==> picture [547 x 265] intentionally omitted <==**

**----- Start of picture text -----**<br>
R145 1.50 MAX.059 MAX R26 2.10 MAX R38 3.10 MAX<br>.083 MAX .122 MAX<br>0.26 DIA<br>.010 DIA 0.35 DIA SCALE NONE DIMENSION IN mm/INCH<br>0.2 DIA .014 DIA<br>.008 DIA<br>0.70<br>0.45 .028 1.10<br>.018 .043<br>— _ + Qe .<br>PART NUMBERING SYSTEM<br>LOAD  EXTENDED<br>SERIES FREQUENCY TOLERANCE<br>CAPACITANCE TEMPERATURE<br>R38 - - - -<br>±5 PPM      EXT<br>R26 IN kHz IN pF<br>±10 PPM     ( ±20 PPM ONLY)<br>R145<br>6.20 MAX .244 MAX 8.20 MAX .323 MAX<br>4.30 .169 5.6 MIN .220 MIN 10.00±1.0 .394±.039<br>5.10 MAX .201 MAX<br>**----- End of picture text -----**<br>


EXAMPLES: R38-32.768-6-10PPM R26-32.768-12.5-EXT 

**Raltron Electronics Corporation 10651 NW 19th St. Miami, Florida 33172 U.S.A. Tel: 305-593-6033 Fax: 305-594-3973  e-mail: sales@raltron.com  Internet: http://www.raltron.com**

Updated at April 20, 2026

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