Part Review Mismatch
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Part Information Review: ECS-480-7-33B2-CTN-TR3
Review date: 2026-07-22 Official product page: https://ecsxtal.com/products/crystals/surface-mount-crystals/ecs-480-7-33b2-ctn-tr3/
Completed the part review and updated the part’s Datasheet URL to the official ECS PDF:
https://www.ecsxtal.com/store/pdf/ECS-33B2.pdf.I created the detailed findings in Part Information Review: ECS-480-7-33B2-CTN-TR3. Key flags: footprint pad size and horizontal spacing match, but the vertical pad center spacing appears to be 1.8 mm vs. 1.9 mm from OCR’d datasheet land pattern; GND pins are typed as
Power In; pin descriptions are missing; and the part is labeled as an oscillator even though the datasheet describes a passive crystal.Suggested next steps:
- Visually confirm the datasheet land-pattern vertical spacing before changing the footprint.
- Update GND terminal pin types and pin descriptions.
- Improve the part description and Part Type if the taxonomy supports
Crystal.
Fix issues and verify
Fix pin metadata
Verify land pattern
Run review checks
Export footprint report
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Part Information Review: ECS-480-7-33B2-CTN-TR3
Review date: 2026-07-22
Sources
- Official product page: https://ecsxtal.com/products/crystals/surface-mount-crystals/ecs-480-7-33b2-ctn-tr3/
- Official datasheet set on part: https://www.ecsxtal.com/store/pdf/ECS-33B2.pdf
- Current Flux part UID:
1d770bc8-1369-4064-9a1a-abf74a4b1333
Current part metadata observed
Table
| Field | Current value / observation |
|---|---|
| Project / part name | ECS-480-7-33B2-CTN-TR3 |
| Description | ECS-480-7-33B2-CTN-TR3 |
| Manufacturer Part Number | ECS-480-7-33B2-CTN-TR3 |
| Manufacturer Name | ECS Inc. in library search; project metadata originally exposed only MPN + prefix before datasheet update |
| Designator Prefix | Y |
| Part Type | Library result reports Oscillator under Crystals and Oscillators |
| Datasheet URL | Updated to https://www.ecsxtal.com/store/pdf/ECS-33B2.pdf |
| Terminal count | 4 |
| Package / footprint asset | XTAL_ECS-480-7-33B2-CTN-TR3.kicad_mod |
| 3D model | ECS-480-7-33B2-CTN-TR3.step |
Datasheet / product-page key specs
Table
| Parameter | Value |
|---|---|
| Manufacturer | ECS Inc. |
| Series / package code | ECS-33B2 / 33B2 |
| Component type | SMD MHz crystal |
| Frequency | 48.000 MHz |
| Load capacitance | 7 pF |
| Frequency tolerance | ±10 ppm |
| Frequency stability | ±20 ppm per official product page |
| ESR | 30 Ω max for 40–54 MHz range |
| Package size | 3.2 mm × 2.5 mm × 0.8 mm max height |
| Operating temperature | -40 °C to +85 °C |
| Storage temperature | -40 °C to +125 °C |
| Drive level | 200 µW |
| Shunt capacitance | 2 pF |
| Aging | ±2 ppm first year |
| Packaging | TR3, 3000 pcs/reel |
| Reflow | 260 °C peak, 10 s max, 2 cycles max; MSL 1; Au finish |
Datasheet pin / pad functions
Table
| Pad | Datasheet function | Current schematic terminal | Current pin type |
|---|---|---|---|
| 1 | In/Out | IN/OUT | Bi-Directional |
| 2 | Gnd | GND | Power In |
| 3 | Out/In | OUT/IN | Bi-Directional |
| 4 | Gnd | GND | Power In |
Datasheet notes: pads 1 and 3 are interchangeable; pads 2 and 4 are grounded to the metal lid; chamfer on the bottom pad has no electrical significance.
Footprint cross-check
Datasheet mechanical / land-pattern data from official PDF OCR:
Table
| Item | Datasheet value | Current footprint value | Result |
|---|---|---|---|
| Body length | 3.2 ±0.1 mm | Fab outline 3.2 mm | Match |
| Body width | 2.5 ±0.1 mm | Fab outline 2.5 mm | Match |
| Max height | 0.8 mm | STEP model present; exact height not numerically checked from model | Needs visual/3D verification if height is critical |
| Pad size | 1.3 mm × 1.1 mm | 1.3 mm × 1.1 mm | Match |
| Horizontal pad center spacing | 2.3 mm | ±1.15 mm = 2.3 mm | Match |
| Vertical pad center spacing | 1.9 mm | ±0.9 mm = 1.8 mm | Mismatch / possible land-pattern issue |
| Pad count | 4 | 4 | Match |
| Pin 1 marker | Required for orientation | Silk/fab circle at pin-1 side | Match |
Footprint pad coordinates from the KiCad asset:
- Pad 1: (-1.15, +0.9), size 1.3 × 1.1 mm
- Pad 2: (+1.15, +0.9), size 1.3 × 1.1 mm
- Pad 3: (+1.15, -0.9), size 1.3 × 1.1 mm
- Pad 4: (-1.15, -0.9), size 1.3 × 1.1 mm
The schematic-to-footprint pin mapping is electrically consistent with the datasheet: 1 = IN/OUT, 2 = GND, 3 = OUT/IN, 4 = GND. Coordinate sign differences between KiCad and Flux-rendered layout are expected display-coordinate differences; the KiCad asset pin orientation itself matches the datasheet pin map.
Mismatches / issues flagged
- Datasheet URL was missing and has been added. The official ECS PDF URL is now set on the part.
- Footprint vertical pad center spacing appears off by 0.1 mm. Datasheet OCR reports 1.9 mm suggested vertical center spacing, while the footprint uses 1.8 mm center spacing. Pad size, horizontal spacing, body outline, and pin mapping match. Because this value came from OCR of the land-pattern drawing, it should be verified visually against the PDF drawing before changing the footprint.
- Ground terminal pin type is set to
Power In, notGround. Electrically this may pass, but the datasheet identifies pads 2 and 4 as GND / grounded lid. AGroundpin type would be semantically cleaner if Flux part-review checks expect it. - Pin descriptions are not populated. Terminal names and pin numbers are correct, but no explicit
Pin Descriptionproperties were observed. Recommended descriptions: pad 1Crystal electrode, interchangeable with pad 3; pad 2Ground / metal lid; pad 3Crystal electrode, interchangeable with pad 1; pad 4Ground / metal lid. - Part Type is
Oscillatorin the library result, while the datasheet describes a passive SMD crystal. Depending on Flux taxonomy this may be acceptable underCrystals and Oscillators, but a more precise type would beCrystalif available. - Description is generic. Current description is just the MPN. Suggested description:
48 MHz SMD crystal, 7 pF load, ±10 ppm tolerance, ±20 ppm stability, 30 Ω ESR, 3.2 × 2.5 mm 4-pad ECS-33B2. - Manufacturer facet shows
Otherin library search despiteManufacturer Name = ECS Inc.property. This may be a library indexing/facet issue rather than a part-property issue.
Recommended next actions
- Visually verify the ECS PDF land-pattern figure for the vertical pad center spacing before editing the footprint.
- If confirmed, adjust pad Y positions from ±0.90 mm to ±0.95 mm while keeping pad size 1.3 × 1.1 mm.
- Update ground terminal pin types to
Groundand add explicit pin descriptions. - Improve description and, if supported by the taxonomy, change Part Type from
OscillatortoCrystal.
Sources
Current part metadata observed
Datasheet / product-page key specs
Datasheet pin / pad functions
Footprint cross-check
Mismatches / issues flagged
Recommended next actions
