# Crystal, ECX-34RR Series, 32.768 kHz, 20 ppm, 12.5 pF
**URL**: https://novapart.co/products/ECS-.327-12.5-34RR-TR/crystal-ecx-34rr-series-32768-khz-20-ppm-125-pf
**SKU**: ECS-.327-12.5-34RR-TR
**Manufacturer**: ECS INC INTERNATIONAL
**Category**: Crystals & Oscillators || Crystals
**Price**: €0.5360
**Stock**: 500+
**Lead Time**: 176 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency Nom | 32.768kHz |
| Product Range | 0 |
| Load Capacitance | 12.5pF |
| Crystal Frequency | 32.768kHz |
| Crystal Case / Package | SMD, 3.2mm x 1.5mm |
| Frequency Stability + / - | - |
| Frequency Tolerance + / - | 20ppm |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4059432/)
## **ECX-34RR SMD CRYSTAL**
The ultra-miniature ECX-34RR is a very compact SMD Tuning Fork Crystal with a Typical ESR of 20K Ω. Low ESR part recommended by STMicroelectronics for the STM32 Microcontrollers.
**Request a Sample**
## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS**
**ECX-34R SMD CRYSTAL PARAMETERS CONDITIONS ECX-34RR UNITS MIN TYP MAX** ~~es~~ Frequency ~~ee~~ Fo 32.768 KHz Frequency Tolerance @ +25°C ± 20 * ppm Load Capacitance Specify in P/N 12.5 pF Equivalent Series Resistance R1 20K 40K Ω ~~Rs es~~ Drive Level ~~ee~~ DL ~~es~~ 0.1 0.5 μW ~~es~~ Quality Factor Q 20K 30K Turnover Temperature +20 +25 +30 °C ~~es~~ • Low Power RTC Applications ~~ee~~ such as STM32 AN2867 ~~— es~~ Temperature Coefficient -0.028 -0.034 -0.040 ppm/°C² • 20K Typ ESR ~~ee~~ Shunt Capacitance Co 1.3 1.6 pF • 3.2 x 1.5 mm Footprint ~~es~~ Motional Capacitance C1 3.8 fF • Extended Temp. Range ~~ee es~~ • RoHS Compliant ~~es~~ Aging (First Year) @ +25°C ±3°C ±3 ppm ~~ee es es~~ Operating Temperature Topr -40 +85 °C **DIMENSIONS (mm)** ~~es~~ Storage Temperature ~~ee~~ Tstg -40 +85 °C Insulation Resistance @ 100V DC 500M Ω ~~pT~~ 4 . **PAD CONNECTIONS** ~~-~~ 1 In/Out ~~oi~~ 0.1 7 7/ 2 Out/In _**Figure 1)** Top, Side, and Bottom views_ _**Figure 2)** Suggested Land Pattern_ **PART NUMBERING GUIDE: Example ECS-.327-12.5-34RR-TR ECS - FREQUENCY ABBREVIATION LOAD PACKAGE CUSTOM OPTIONS PACKAGING CAPACITANCE** Tolerance ~~SS~~ ECS .327 = 32.768 KHz 12.5 = 12.5 pF -34RR = ECX-34RR Blank = ±20 ppm TR = Tape 9 = 9 pF * C = ± 10 ppm & Reel 6 = 6 pF 3K/Reel
_**Figure 2)** Suggested Land Pattern_
Rev.2017
*Contact ECS for availability
## [= S **ECX-34RR SMD CRYSTAL**
## **POCKET TAPE DIMENSIONS (mm)**
**==> picture [347 x 32] intentionally omitted <==**
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CATs [e[o[F[[1M | Reida | oymee
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**SOLDER PROFILE** Peak solder Temp +260°C Max 10 sec Max. 2 Cycles Max. MSL 1, Lead Finish Au (°C) +260 °CPeak +220 °C g +170410 °C : Ee
_**Figure 1)** Suggested Reflow Profile_
## Links
- [View this product on Novapart](https://novapart.co/products/ECS-.327-12.5-34RR-TR/crystal-ecx-34rr-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-327-12-5-34rr-tr/crystal-32-768khz-smd-3-2mmx1/dp/4059432)
---
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