# Crystal, ECX-1637 Series, 25 MHz, 20 ppm, 20 ppm, 6 pF

![Product image](https://novapart.co/image/farnell:4077316/)

**URL**: https://novapart.co/products/ECS-250-6-37-JTN-TR/crystal-ecx-1637-series-25-mhz-20-ppm-6-pf
**SKU**: ECS-250-6-37-JTN-TR
**Manufacturer**: ECS INC INTERNATIONAL
**Category**: Crystals & Oscillators || Crystals
**Price**: €0.2150
**Stock**: 10+
**Lead Time**: 78 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency Nom | 25MHz |
| Product Range | 0 |
| Load Capacitance | 6pF |
| Crystal Frequency | 25MHz |
| Crystal Case / Package | SMD, 2mm x 1.6mm |
| Frequency Stability + / - | 20ppm |
| Frequency Tolerance + / - | 20ppm |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4077316/)

## note 

The sub miniature ECX-1637 is a very compact SMD Crystal.  The 2.0 x 1.6 x 0.45 mm ceramic package is ideal for LoRa WAN, wireless, cellular and high density applicaitons. 

## **ECX-1637 SMD CRYSTAL** 

**Request a Sample** 

## **ECX-1637 SMD CRYSTAL** 

- Low Profile 

- 2.0 x 1.6 mm Footprint 

- Extended Temp. Range Option 

- RoHS Compliant 

## **DIMENSIONS (mm)** 

## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS** 

|**PARAMETERS**|**CONDITIONS**|**ECX-1637**|**ECX-1637**|**ECX-1637**|**UNITS**|
|---|---|---|---|---|---|
|||**MIN**|**TYP**|**MAX**||
|Frequency<br>~~a~~|~~a~~|16.000<br>~~a~~|~~a~~|80.000<br>~~a~~|MHz<br>~~a~~|
|Mode of Oscillation<br>~~SS~~|Fundamental<br>~~SS~~|~~SS~~|~~SS~~|~~SS~~|~~SS~~|
|FrequencyTolerance*<br>~~SO~~|@ +25°C<br>~~SO~~|~~SO~~|~~SO~~|± 50<br>~~SO~~|ppm<br>~~SO~~|
|Frequency Stability*<br>~~OO~~|-20 ~ +70°C<br>~~OO~~|~~OO~~|~~OO~~|± 50<br>~~OO~~|ppm<br>~~OO~~|
|Shunt Capacitance<br>~~OO~~|Co<br>~~OO~~|~~OO~~|~~OO~~|5<br>~~OO~~|pF<br>~~OO~~|
|Load Capacitance<br>~~So~~|Specifyin P/N<br>~~So~~|~~So~~|8<br>~~So~~|~~So~~|pF<br>~~So~~|
|Drive Level<br>~~a~~|DL|||100|μW|
|Operating Temperature*<br>~~a~~|Topr|-20||+70|°C|
|Storage Temperature<br>~~SO~~|Tstg<br>~~SO~~|-40<br>~~SO~~|~~SO~~|+85<br>~~SO~~|°C<br>~~SO~~|
|Aging (First Year)|@ +25°C ±3°C|||±5|ppm|



|**Frequency (MHz)         ESR Ω Max.**|**Frequency (MHz)         ESR Ω Max.**|
|---|---|
|16.000 ~ 23.999|100|
|24.000 ~ 25.999|80|
|26.000 ~ 39.999|60|
|40.000 ~ 80.000|50|



_**Figure 1)** Top, Side, and Bottom_ 

Crystal is symmetrical, pad 1 & 3 are interchangeable. Chamfer on the bottom pad has no electrical significance. 

|**Pad Connections**|**Pad Connections**|
|---|---|
|1|In/Out|
|2|Gnd|
|3|Out/In|
|4|Gnd|



_**Figure 2)** Suggested land_ 

## **PART NUMBERING GUIDE:  Example ECS-240-8-37-TR** 

|**ECS -  FREQUENCY ABBREVIATION**|**ECS -  FREQUENCY ABBREVIATION**|**ECS -  FREQUENCY ABBREVIATION**||**LOAD**|||**PACKAGE**|**PACKAGE**|||**AVAILABLE OPTIONS**|**AVAILABLE OPTIONS**||**PACKAGING**|**PACKAGING**|**PACKAGING**||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||**CAPACITANCE**||||||Tolerance        Stability                 Temp Range||Tolerance        Stability                 Temp Range|Tolerance        Stability                 Temp Range|Tolerance        Stability                 Temp Range||||
|||||||||||||||||||
|240 = 24.000  MHz<br>ECS||||8 = 8 pF|||-37 =||Blank = Std||Blank= Std|Blank= Std||||TR = 1K|TR = 1K|
|See P/N Guide||||10 = 10 pF<br>S=Series|||ECX-1637||A = ± 25ppm<br>J = ± 20ppm<br>R = ± 15ppm||D= ±100 ppm<br>E = ± 50 ppm<br>G = ± 30 ppm|L =   -10 ~ +70°C<br>M = -20 ~ +70°C<br>Y  =  -30 ~ +85°C||||TR3 = 3K<br>Qty/Reel||
|* Specify available options in P/N.|||||||||C = ± 10ppm||H = ± 25 ppm<br>T = ± 20 ppm †|N =  -40 ~ +85°C<br>P =  -40 ~ +105°C||||||
|† Contact ECS for availability over extended temp range.||||† Contact ECS for availability over extended temp range.|||||||W = ±15 ppm †<br>K = ± 10 ppm †|S =  -40 ~ +125°C<br>U =  -55 ~ +125°C||||Rev.2021||



* Specify available options in P/N. † Contact ECS for availability over extended temp range. 

## **ECX-1637 SMD CRYSTAL** 

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

|**SOLDER PROFILE**||||
|---|---|---|---|
|||||
|Peak solder Temp+260°C Max 10 sec Max.||**DEVELOPED FREQUENCIES**||
|2 Cycles Max.||Abbreviation|Frequency (MHZ)|
|MSL 1,Lead Finish Au||160|16.000|
|||192|19.200|
|||200|20.000|
|,<br>1041 sec.||240|24.000|
|#260“CPeak_—>_—||250|25.000|
|||260|26.000|
|+220°CNX||270<br>271.2|27.000<br>27.120|
|||300|30.000|
|||320|32.000|
|||360|36.000|
|||384|38.400|
|+. —120420sec.||400<br>480|40.000<br>48.000|
|||500|50.000|
|||540|54.000|



_**Figure 1)** Suggested Reflow Profile_ 



## Links

- [View this product on Novapart](https://novapart.co/products/ECS-250-6-37-JTN-TR/crystal-ecx-1637-series-25-mhz-20-ppm-6-pf)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/ecs-inc-international/ecs-250-6-37-jtn-tr/crystal-25mhz-6pf-smd-2mm-x-1/dp/4077316)
---

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