ECS-.327-6-34B-C-TR

## **ECX-31B SMD CRYSTAL** 

The miniature ECX-31B is the most cost effective SMD Tuning Fork Crystal today. The 3.2 x 1.5 x 0.9 mm ceramic package is ideal high density circuit boards. Offerings in extended temperature and frequency tolerance as low at ±10 ppm. 

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## **ECX-31B SMD CRYSTAL** 

- Low Profile 

- 3.2 x 1.5 mm Footprint 

- Extended Temp. Range 

- RoHS Compliant 

- Low Power RTC Applications such as STM32 AN2867 

## **DIMENSIONS (mm)** 

## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS** 

|**PARAMETERS**<br>||**CONDITIONS**|**ECX-31B**|**ECX-31B**|**ECX-31B**|**UNITS**|
|---|---|---|---|---|---|
||~~es~~|**MIN**|**TYP**|**MAX**||
|Frequency<br>~~es~~|~~es~~<br>~~es~~|~~es~~|32.768<br>~~es~~|~~es~~|KHz<br>~~es~~|
|Frequency Tolerance<br>~~oo~~|@ +25°C<br>~~es~~<br>~~EE~~|~~EE~~|~~EE~~|± 20 *<br>~~EE~~|ppm<br>~~EE~~|
|Temperature Coefficient<br>~~oo~~|~~es~~<br>~~EE~~|-0.028<br>~~EE~~|-0.034<br>~~EE~~|-0.040<br>~~EE~~|ppm/°C²<br>~~EE~~|
|Shunt Capacitance<br>~~oo~~|Co<br>~~es~~<br>~~EE~~<br>~~es~~|~~EE~~|1.05<br>~~EE~~|~~EE~~|pF<br>~~EE~~|
|Load Capacitance<br>~~oo ~~<br>~~es~~|Specify in P/N<br>~~es~~<br> ~~EE~~<br>~~es~~<br>~~es~~<br>~~es~~|~~EE~~<br>~~es~~|12.5<br>~~EE~~<br>~~es~~|~~EE~~<br>~~es~~|pF<br>~~EE~~<br>~~es~~|
|Drive Level<br>~~es~~|DL<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|~~es~~|0.1<br>~~es~~|1.0<br>~~es~~|μW<br>~~es~~|
|Equivalent Series Resistance<br>~~es~~<br>~~a~~|R1<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|~~es~~|~~es~~|70K<br>~~es~~|Ω<br>~~es~~|
|Insulation Resistance<br>~~es~~<br>~~a~~|@ 100V DC<br>~~es~~<br>~~es~~<br>~~es~~|500M<br>~~es~~|~~es~~|~~es~~|Ω<br>~~es~~|
|Turnover Temperature<br>~~a~~|~~es~~<br>~~es~~|+20|+25|+30|°C|
|Operating Temperature<br> ~~es~~|Topr<br>~~es~~<br>~~es~~<br>~~es~~|-40<br>~~es~~|~~es~~|+85<br>~~es~~|°C<br>~~es~~|
|Storage Temperature<br> <br>~~es~~|Tstg<br><br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|-55<br><br>~~es~~|~~es~~|+125<br><br>~~es~~|°C<br><br>~~es~~|
|Aging (First Year)<br>~~es~~|@ +25°C ±3°C<br>~~es~~<br>~~es~~<br>~~es~~|~~es~~|~~es~~|±3<br>~~es~~|ppm<br>~~es~~|



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_**Figure 1)** Top, Side, and Bottom views_ 

_**Figure 2)** Suggested Land Pattern_ 

**PART NUMBERING GUIDE:  Example ECS-.327-12.5-34B-TR ECS -  FREQUENCY ABBREVIATION LOAD PACKAGE CUSTOM OPTIONS PACKAGING CAPACITANCE** Tolerance ~~ee~~ ECS .327 = 32.768  KHz 12.5 = 12.5 pF -34B = ECX-31B Blank = ±20 ppm TR = 3K/Reel 9 = 9 pF * C = ± 10 ppm TR9 = 9K/Reel 7 = 7 pF 6 = 6 pF LI L_ ~~a a~~ ee ee *Contact ECS for availability Rev.2022 

Rev.2022 

## Fl S **ECX-31B SMD CRYSTAL** 

## **POCKET TAPE DIMENSIONS (mm)** 

**SOLDER PROFILE** Peak solder Temp +260°C Max 10 sec Max. 2 Cycles Max. MSL 1, Lead Finish Au 

_**Figure 1)** Suggested Reflow Profile_