RT2012-32.768-7-20-EXT-TR

**TUNING FORK CRYSTAL** 

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## **RT2012-32.768-7-20-EXT-TR** 

##  **ELECTRICAL SPECIFICATIONS** 

|**PARAMETER**|**VALUE**|
|---|---|
|NOMINAL FREQUENCY|32.768 kHz|
|FREQUENCY TOLERANCE AT 25°C|±20ppm max|
|TURNOVER TEMPERATURE|25°C ± 5°C|
|PARABOLIC CURVATURE CONSTANT|-0.034ppm/Δ°C2|
|LOAD CAPACITANCE|7pF|
|EQUIVALENT SERIES RESISTANCE|90 kΩ max|
|DRIVE LEVEL|1.0µW max|
|SHUNT CAPACITANCE|1.5pF|
|AGING(FIRST YEAR)|±3ppm|
|INSULATION RESISTANCE|500 MΩ min|
|OPERATING TEMPERATURE RANGE|-40°C to +85°C|
|STORAGE TEMPERATURE RANGE|-40°C to +85°C|
|SHOCK  RESISTANCE|±5ppm max 75 cm drop test in 3 axes onto a<br>hard surface or 3000gx0.3msx1/2 sinewave<br>in 3 axes|



##  **MECHANICAL SPECIFICATION** 

RALTRON ELECTRONICS  10400 N.W . 33[r d  ] STREET  Miami, Florida 33172  U.S.A. Telephone: +1-305-593-6033   Fax: +1-305-594-3973    e-mail: sales@raltron.com    web site: http://www.raltron.com 

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## **TUNING FORK CRYSTAL** 

## **RT2012-32.768-7-20-EXT-TR** 

## **REFLOW PROFILE** 

**==> picture [361 x 157] intentionally omitted <==**

**----- Start of picture text -----**<br>
tP<br>TP<br>Critical Zone<br>Ramp-up  TL to TP<br>TL<br>tL<br>TSMAX<br>Temp.<br>[°C]<br>Ramp-down<br>TSMIN<br>tS Preheat<br>**----- End of picture text -----**<br>


**t[25°C] to Peak** 

**Time [s]** 

|**Reflow profile**|**Reflow profile**|**Reflow profile**|
|---|---|---|
|TemperatureMin Preheat|TSMIN|150°C|
|TemperatureMax Preheat|TSMAX|200°C|
|Time (TSMINtoTSMAX)|tS|60-180 sec.|
|Temperature|TL|217°C|
|Peak Temperature|TP|260°C|
|Ramp-uprate|RUP|3°C/smax.|
|Ramp-down rate|RDOWN|6°C/smax.|
|Timewithin5°C of Peak Temperature|tP|10 s|
|Time t[25°C] toPeak Temperature|t[25°C] toPeak|480 s|
|Time|tL|60-150 s|



##  **ENVIRONMENTAL** 

|**PARAMETER**|**VALUE **|
|---|---|
|MOISTURE SENSITIVITY LEVEL|1|
|RoHS-2|5/6 COMPLIANT, EXEMPTION 7a|
|REACH SVHC|COMPLIANT|
|HALOGEN-FREE|COMPLIANT|
|ESDCLASSIFICATION LEVEL|N/A|
|TERMINATION FINISH|Sn|



RALTRON ELECTRONICS  10400 N.W . 33[r d  ] STREET  Miami, Florida 33172  U.S.A. Telephone: +1-305-593-6033   Fax: +1-305-594-3973    e-mail: sales@raltron.com    web site: http://www.raltron.com 

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## **TUNING FORK CRYSTAL** 

## **RT2012-32.768-7-20-EXT-TR** 

##  **MARKING** 

R3xym 

x – Internal Production ID code y – Year code m – Month code 

|**YEARCODE**|**YEARCODE**|
|---|---|
|**Year**|**Code**|
|2011|1|
|2012|2|
|2013|3|
|2014|4|
|2015|5|
|2016|6|
|2017|7|
|2018|8|
|2019|9|



|**MONTH CODE**|**MONTH CODE**|
|---|---|
|**MONTH**|**CODE**|
|JANUARY|A|
|FEBRUARY|B|
|MARCH|C|
|APRIL|D|
|MAY|E|
|JUNE|F|
|JULY|G|
|AUGUST|H|
|SEPTEMBER|J|
|OCTOBER|K|
|NOVEMBER|L|
|DECEMBER|M|



##  **APPROVAL** 

|DRAWN BY:|KJackson, September 3, 2015|
|---|---|
|APPROVED BY:|KJackson, September 3, 2015|
|REVISION:|A, Initial Release|



RALTRON ELECTRONICS  10400 N.W . 33[r d  ] STREET  Miami, Florida 33172  U.S.A. Telephone: +1-305-593-6033   Fax: +1-305-594-3973    e-mail: sales@raltron.com    web site: http://www.raltron.com