ECS-.327-12.5-12R-C-TR

Crystal, ECX-12R Series, 32.768 kHz, 10 ppm, 12.5 pF

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Manufacturer: ECS INC INTERNATIONAL
Product type: Crystals
SVHC: No SVHC (04-Feb-2026)
Frequency Nom: 32.768kHz
Product Range: ECX-12R Series
Load Capacitance: 12.5pF
Crystal Frequency: 32.768kHz
Crystal Case / Package: SMD, 2mm x 1.2mm
Frequency Stability + / -: -
Frequency Tolerance + / -: 10ppm
Operating Temperature Max: 85°C
Operating Temperature Min: -40°C

Delivery and price
Units per pack	1500
Price	0.34 €
Current stock	1000+
Lead time	30 days

Datasheet

The ultra-miniature ECX-12R 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 Wearable technology. 

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

## **ECX-12R SMD CRYSTAL** 

## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS** 

|**PARAMETERS**|**CONDITIONS**|**ECX-12R**|**ECX-12R**|**ECX-12R**|**UNITS**|
|---|---|---|---|---|---|
||~~es~~|**MIN**<br>~~es~~|**TYP**<br>~~ee~~|**MAX**||
|Frequency<br>~~ee~~|~~ee~~<br>~~es~~|~~ee~~<br>~~es~~|32.768<br>~~ee~~<br>~~ee~~|~~ee~~|KHz<br>~~ee~~|
|Frequency Tolerance<br>~~——~~|@ +25°C<br>~~es~~<br>~~——~~|~~es ~~<br>~~——~~|~~ee~~<br>~~——~~|± 20 *<br>~~——~~|ppm<br>~~——~~|
|Load Capacitance<br>~~——~~|Specifyin P/N<br>~~——~~|~~——~~|12.5<br>~~——~~|~~——~~|pF<br>~~——~~|
|Drive Level<br>~~a~~|DL<br>~~es~~|~~ee~~||1.0|μW|
|Equivalent Series Resistance<br>~~a~~<br>~~ae~~|R1<br>~~es~~<br>~~es~~|~~ee~~<br>~~es~~||70K|Ω|
|Turnover Temperature<br>~~a~~<br>~~ae~~|~~es ~~<br>~~es~~|+20<br> ~~ee~~<br>~~es~~|+25|+30|°C|
|Temperature Coefficient<br>~~ae~~<br>~~———~~|~~es~~<br>~~———~~|-0.03<br>~~es~~<br>~~———~~|-0.033<br>~~———~~|-0.036<br>~~———~~|ppm/°C²<br>~~———~~|
|Shunt Capacitance<br>~~———~~|Co<br>~~———~~|~~———~~|1.3<br>~~———~~|~~———~~|pF<br>~~———~~|
|Aging(First Year)<br>~~———~~|@ +25°C ±3°C<br>~~———~~|~~———~~|~~———~~|±3<br>~~———~~|ppm<br>~~———~~|
|Operating Temperature|Topr|-40||+85|°C|
|Storage Temperature|Tstg|-55||+125|°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-.327-12.5-12R-TR ECS -  FREQUENCY ABBREVIATION LOAD PACKAGE CUSTOM OPTIONS PACKAGING CAPACITANCE** Tolerance ~~eeee~~ ECS .327 = 32.768  KHz 12.5 = 12.5 pF -12R = ECX-12R Blank = ±20 ppm TR = Tape 9 = 9 pF * C = ± 10 ppm & Reel 7 = 7 pF 3K/Reel 6 = 6 pF ~~a _ ee~~ 

*Contact ECS for availability 

Rev.2018 

## **ECX-12R** 

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

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

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

_**Figure 1)** Suggested Reflow Profile_

Updated at June 5, 2026

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