component
ECS-120-18-33-JEM-TR3
Public Made by Adomby adom
ECS Crystals, SMD3225-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownECS-120-18-33-JEM-TR3
ECS · Crystals · SMD3225-4P
ECS-120-18-33-JEM-TR3 from ECS, in a SMD3225-4P. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | In/Out | passive | Crystal terminal labelled In/Out in the pad connections table; pads 1 and 3 are interchangeable because the crystal is symmetrical. |
| 2 | Gnd | power_in | Ground pad listed as Gnd in the pad connections table. |
| 3 | Out/In | passive | Crystal terminal labelled Out/In in the pad connections table; pad 3 is interchangeable with pad 1 because the crystal is symmetrical. |
| 4 | Gnd | power_in | Ground pad listed as Gnd in the pad connections table; the bottom chamfer may be on pad 4 or pad 1 and has no electrical significance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ECS |
| Package | SMD3225-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Frequency Tolerance @ +25°C (this MPN, J = ±20 ppm) | -20 | 20 | ppm | @ +25°C | 1 | ||
| Frequency Stability (this MPN, E = ±50 ppm) | -50 | 50 | ppm | -20 ~ +70°C | 1 | ||
| Aging (First Year) | -5 | 5 | ppm | @ +25°C ±3°C | 1 | ||
| Equivalent Series Resistance (ESR), 10.000 ~ 15.999 MHz band | ESR | 100 | Ω | Frequency 10.000 ~ 15.999 MHz | 1 | ||
| Shunt Capacitance | Co | 5 | pF | 1 | |||
| Drive Level | DL | 100 | μW | 1 | |||
| Operating Temperature | Topr | -20 | 70 | °C | 1 | ||
| Storage Temperature | Tstg | -55 | 125 | °C | 1 | ||
| Frequency | 8 | 12 | 54 | MHz | ECX-32 family range; this MPN is 12.000 MHz (code 120, page 2) | 1 | |
| Load Capacitance (specified in P/N) | CL | 18 | pF | Specified in P/N; this MPN = 18 pF | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | gold | MSL 1, Lead Finish Au POCKET TAPE DIMENSIONS (mm) | 2 |
CAD (KiCad official)
- Symbol:
ECS-120-18-33-JEM-TR3 - Footprint:
Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm - 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files:
ecs-120-18-33-jem-tr3-etched.step/ecs-120-18-33-jem-tr3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ecs-120-18-33-jem-tr3.step/ecs-120-18-33-jem-tr3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ECS datasheet (2 pp, sha256
7f56a768dd3d4594, retrieved 2026-10-31, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).