# Crystal, ECX-12RR Series, 32.768 kHz, 20 ppm, 12.5 pF

![Product image](https://novapart.co/image/farnell:4144672RL/)

**URL**: https://novapart.co/products/ECS-.327-12.5-12RR-TR/crystal-ecx-12rr-series-32768-khz-20-ppm-125-pf
**SKU**: ECS-.327-12.5-12RR-TR
**Manufacturer**: ECS INC INTERNATIONAL
**Category**: Crystals & Oscillators || Crystals
**Price**: €0.6770
**Stock**: 1000+
**Lead Time**: 232 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency Nom | 32.768kHz |
| Product Range | ECX-12RR Series |
| Load Capacitance | 12.5pF |
| Crystal Frequency | 32.768kHz |
| Crystal Case / Package | SMD, 2mm x 1.2mm |
| Frequency Stability + / - | - |
| Frequency Tolerance + / - | 20ppm |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4144672RL/)

The ultra-miniature ECX-12RR is a very compact SMD Tuning Fork Crystal.  The 2.0 x 1.2 x 0.6 mm ceramic package with reduced ESR is ideal for IoT and Wearale technology. 

## **ECX-12RR 32.768 KHz SMD Tuning Fork Crystal Low ESR** 

## **ECX-12RR SMD CRYSTAL** 

- Low ESR 50K Ohms Max. 

- 2.0 x 1.2 mm Footprint 

- Low Power RTC Applications such as STM32 AN2867 

- RoHS Compliant 

- Applications:  Metering, Automotive, Industrial, IOT and Wearables. 

## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS** 

**PARAMETERS CONDITIONS ECX-12RR UNITS MIN TYP MAX** ~~ee~~ Frequency ~~ee Ge~~ 32.768 ~~ee es~~ KHz Frequency Tolerance @ +25°C ± 20 ppm ~~——~~ Load Capacitance Specify in P/N 12.5 pF Drive Level DL 0.1 0.5 μW ~~a es tn I~~ Equivalent Series Resistance R1 35K 50K Ω Turnover Temperature +20 +25 +30 °C ~~—~~ Temperature Coefficient -0.030 -0.040 ppm/°C² Shunt Capacitance Co 1.7 2.0 pF ~~—~~ Aging (First Year) @ +25°C ±3°C ±3 ppm Operating Temperature Topr -40 +85 °C ~~ee~~ Storage Temperature Tstg -40 +85 °C 

## **DIMENSIONS (mm)** 

|**PAD CONNECTIONS**|**PAD CONNECTIONS**|
|---|---|
|1|In/Out|
|2|Out/In|



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

_**Figure 2)** Suggested Land Pattern_ 

## **PART NUMBERING GUIDE:  Example ECS-.327-12.5-12RR-TR** 

|**ECS       FREQUENCY ABBREVIATION**<br>~~a~~|**ECS       FREQUENCY ABBREVIATION**<br>~~a~~|**ECS       FREQUENCY ABBREVIATION**<br>~~a~~|**LOAD CAPACITANCE**|**PACKAGE**|**PACKAGE**|||**PACKAGING**|**PACKAGING**|
|---|---|---|---|---|---|---|---|---|---|
||ECS|.327 = 32.768  KHz|12.5 = 12.5 pF<br>9 = 9 pF||-12RR = ECX-12RR||||TR = Tape<br>& Reel|
||||6 = 6 pF||||||3K/Reel|



Rev.2018 

**32.768 KHz SMD Tuning Fork Crystal Low ESR** 

## [= S **ECX-12RR** 

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

ate [e [ors [tw | tesa. | are sa ieee se] es| em) | 

**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-.327-12.5-12RR-TR/crystal-ecx-12rr-series-32768-khz-20-ppm-125-pf)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/ecs-inc-international/ecs-327-12-5-12rr-tr/crystal-32-768khz-12-5pf-2mm-x/dp/4144672RL)
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