Part Review Audit
Thought for 6 sec
I’ll review the oscillator part metadata, find and set the official datasheet URL if it’s missing, then cross-check symbol, footprint, and pin descriptions against the datasheet.
Worked for 2 mins 30 sec
The part already has a Datasheet URL, so I’m preserving it; I also found the official ECS PDF and am using it as the cross-check reference.
Worked for 5 mins 3 sec
Created a project doc
Part Review - ECS-2520MVLC-081.92-CN-TR
Date: 2026-07-13 Manufacturer part number: ECS-2520MVLC-081.92-CN-TR
Completed the part review and created the detailed report: Part Review - ECS-2520MVLC-081.92-CN-TR.
Key result: MPN, package, 4-pin symbol mapping, and embedded footprint payload match the ECS datasheet. Flagged items: pin types/descriptions are missing, the Datasheet URL points to a stored copy instead of the official ECS URL, and the layout tree shows a possible 1000x computed pad-geometry scaling anomaly that should be visually verified before publishing.
Fix pins and verify
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Part Review - ECS-2520MVLC-081.92-CN-TR
Date: 2026-07-13
Reviewed Part Information
- Manufacturer part number: ECS-2520MVLC-081.92-CN-TR
- Manufacturer: ECS Inc. International
- Description: Standard clock oscillator, 8.192 MHz, MultiVolt low-current CMOS output, 1.6 V to 3.6 V, +/-25 ppm, -40 C to +85 C, RoHS
- Package / case: 4-SMD, 2.5 mm x 2.0 mm ceramic oscillator package
- Pin count: 4
- Mount: Surface Mount
- Compliance: RoHS
- Existing Datasheet URL property: 8ec516596bd2480c0d7db87b9839a1be3ef4e0d4c0f27897b0356925dfffb16b.pdf
- Official ECS datasheet found: https://ecsxtal.com/store/pdf/ECS-2520MVLC.pdf
Note: The part already had a Datasheet URL property set, so the project property was not changed. The official ECS PDF was used as the cross-check reference.
Datasheet-Derived Key Specs
Source: ECS-2520MVLC official datasheet, ECS Inc. International.
- Series: ECS-2520MVLC MultiVolt low-current SMD oscillator
- Nominal frequency for code 081.92: 8.192 MHz
- Frequency stability code C: +/-25 ppm
- Operating temperature code N: -40 C to +85 C
- Supply voltage: 1.6 V to 3.6 V
- Output type / load: CMOS, 15 pF max load
- Output levels: VOL = 90% Vdd
- Duty cycle: 45/55% max at 1/2 Vdd
- Rise/fall time: 7 ns max, 10% Vdd to 90% Vdd
- Start-up time: 5 ms max at 90% Vdd
- Standby current: 10 uA max
- Frequency aging: +/-3 ppm max first year at +25 C
- Storage temperature: -55 C to +125 C
- No-load supply current at 8.192 MHz:
- 1.8 V: 1.5 mA max
- 2.5 V: 1.6 mA max
- 3.3 V: 1.8 mA max
- Soldering: peak +260 C +/-5 C, 10 s +/-5 s max, 2 cycles max
- MSL: 1
- Tape/reel option TR: 1,000 pieces per reel
Datasheet Pinout
Table
| Pin | Datasheet name | Function |
|---|---|---|
| 1 | Tri-state | Output enable / standby control; high or NC = active, low = high impedance |
| 2 | GND | Ground |
| 3 | Output | CMOS oscillator output |
| 4 | Vdd | Supply voltage |
Standby thresholds from datasheet:
- Pin 1 >= 0.7 x Vdd or NC: output active
- Pin 1 <= 0.3 x Vdd: output high impedance
Schematic Symbol Cross-Check
Current symbol terminals:
Table
| Symbol terminal | Pin number property | Datasheet check |
|---|---|---|
| TRI-STATE | 1 | Matches pin 1 Tri-state |
| GND | 2 | Matches pin 2 GND |
| OUTPUT | 3 | Matches pin 3 Output |
| VDD | 4 | Matches pin 4 Vdd |
Result: Symbol pin names and pin numbers match the datasheet pinout.
Symbol issues / cleanup opportunities:
- All terminal Pin Type properties are currently Unspecified. Recommended types: TRI-STATE = Input, GND = Ground, OUTPUT = Output, VDD = Power In.
- Explicit Pin Description properties are not populated. Recommended descriptions are the functions listed in the datasheet pinout table above.
Footprint Cross-Check
Datasheet package dimensions:
- Body: 2.5 mm x 2.0 mm x 0.8 mm
- Package tolerance noted in datasheet extraction: +/-0.1 mm on body dimensions
- Bottom pad / package detail includes C0.3 chamfer/edge detail and side metallization detail
Datasheet suggested land pattern, from available extraction:
- Land pad: about 0.9 mm x 0.8 mm
- Pad spacing / center-related dimension: 0.95 mm shown in the land pattern figure
- Vertical gap between upper/lower land pads: about 0.65 mm
Current imported KiCad footprint payload:
- Fabrication outline: 2.5 mm x 2.0 mm, matching datasheet body size
- Pad count: 4, matching datasheet
- Pad size in footprint payload: 0.800 mm x 0.900 mm, rotated 90 degrees; this corresponds to the datasheet's ~0.9 mm x 0.8 mm land pads
- Pad centers in footprint payload:
- Pad 1: (-0.925, +0.725) mm
- Pad 2: (+0.925, +0.725) mm
- Pad 3: (+0.925, -0.725) mm
- Pad 4: (-0.925, -0.725) mm
- This gives center-to-center spacing of 1.85 mm horizontally and 1.45 mm vertically, consistent with a 2.5 mm x 2.0 mm oscillator land pattern with 0.8/0.9 mm pads and about 0.65 mm internal gap.
Result: The embedded KiCad footprint payload appears consistent with the datasheet land pattern and 4-pad package.
Footprint issues / risks:
- The layout tree's computed child pad rules report pad sizes and positions as 0.0008/0.0009 and 0.000925-scale coordinates while the embedded KiCad footprint payload uses 0.800/0.900 mm and 0.925 mm. This looks like a unit display/extraction scaling anomaly. If the actual PCB editor renders the footprint at micron scale, the footprint must be fixed before release; if the editor uses the KiCad payload dimensions, the footprint is acceptable.
- Courtyard in the imported footprint is 4.75 mm x 4.25 mm, much larger than the 2.5 mm x 2.0 mm body. This is conservative rather than electrically wrong, but may waste placement area.
Mismatch Summary
Confirmed matches:
- MPN matches ECS part-numbering structure.
- Frequency code 081.92 matches 8.192 MHz.
- Stability code C matches +/-25 ppm.
- Temperature code N matches -40 C to +85 C.
- TR packaging matches 1,000/reel.
- Symbol pin numbers and names match the datasheet pinout.
- Footprint pad count, body outline, and pad land dimensions in the embedded KiCad footprint payload match the datasheet.
Flagged mismatches / concerns:
- Pin electrical types are all Unspecified instead of functional types.
- Pin descriptions are missing, though terminal labels are correct.
- The layout tree reports computed pad geometry at 1000x smaller numerical scale than the KiCad footprint payload; verify actual PCB rendering before publishing or manufacturing.
- The Datasheet URL property points to a stored copy rather than the official ECS URL. This is not wrong, but the official source is https://ecsxtal.com/store/pdf/ECS-2520MVLC.pdf.
Reviewed Part Information
Datasheet-Derived Key Specs
Datasheet Pinout
Schematic Symbol Cross-Check
Footprint Cross-Check
Mismatch Summary
