# Crystal, ECX-31B Series, 32.768 kHz, 10 ppm, 6 pF

![Product image](https://novapart.co/image/farnell:4144674/)

**URL**: https://novapart.co/products/ECS-.327-6-34B-C-TR/crystal-ecx-31b-series-32768-khz-10-ppm-6-pf
**SKU**: ECS-.327-6-34B-C-TR
**Manufacturer**: ECS INC INTERNATIONAL
**Category**: Crystals & Oscillators || Crystals
**Price**: €0.3500
**Stock**: 1000+
**Lead Time**: 106 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency Nom | 32.768kHz |
| Product Range | ECX-31B Series |
| Load Capacitance | 6pF |
| Crystal Frequency | 32.768kHz |
| Crystal Case / Package | SMD, 3.2mm x 1.5mm |
| Frequency Stability + / - | - |
| Frequency Tolerance + / - | 10ppm |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4144674/)

## **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. 

**Request a Sample** 

## **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~~|



**==> picture [96 x 38] intentionally omitted <==**

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PAD CONNECTIONS<br>1  In/Out<br>2  Out/In<br>**----- End of picture text -----**<br>


_**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_ 



## Links

- [View this product on Novapart](https://novapart.co/products/ECS-.327-6-34B-C-TR/crystal-ecx-31b-series-32768-khz-10-ppm-6-pf)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/ecs-inc-international/ecs-327-6-34b-c-tr/crystal-32-768khz-6pf-3-2mm-x/dp/4144674)
---

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