Part Review and Datasheet Update
Clean up the redundant datasheet property, set pin types, add key parametric properties, and run ERC/DRC.
Thought for 6 sec
I’ll remove the redundant terminal datasheet field, set clearer terminal pin types, add the key crystal properties, then run ERC/DRC to verify the part.
Worked for 1 min 35 sec
Completed the cleanup: removed the redundant terminal-level Datasheet URL, set XTAL pins to Passive and case pads to Ground, added key parametric properties (24 MHz, 18 pF, 60 Ω, 20 ppm, −40 to 85 °C, plus implementation details), and ran ERC/DRC.
Open items:
- ERC/DRC returned no ERROR/WARNING/UNCERTAIN/OPEN findings.
- Note: the part-level Datasheet URL still appears as the uploaded PDF in project metadata, though the official Abracon URL was previously added as a project property; Flux may be preserving the original managed datasheet asset field separately.
Suggested next steps:
- Publish/update the part version if this library cleanup is ready.
- Optionally add stability (±30 ppm) and drive level as separate searchable fields if your part schema supports them.
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Part Review: ABM8G-24.000MHZ-18-D2Y-T
Reviewed project information
- Manufacturer part number: ABM8G-24.000MHZ-18-D2Y-T
- Manufacturer: Abracon LLC
- Part type: Crystals and Oscillators
- Description: 24 MHz ±20 ppm crystal, 18 pF load, 60 Ω max ESR, 4-SMD no-lead
- Mount/package: Surface-mount, ABM8G 3.2 × 2.5 × 1.0 mm ceramic glass-sealed SMD crystal
- Pin/pad count: 4
- Official datasheet URL: https://abracon.com/Resonators/ABM8G.pdf
Key datasheet specs
- Frequency: 24.000 MHz
- Load capacitance: 18 pF
- Operation mode: Fundamental
- Frequency tolerance: ±20 ppm at +25 °C
- Frequency stability: ±30 ppm over operating temperature
- Operating temperature: −40 °C to +85 °C
- Storage temperature: −40 °C to +85 °C
- ESR: 60 Ω maximum for 20.001–28.000 MHz range
- Shunt capacitance: 5.0 pF maximum
- Drive level: 10 µW typical, 100 µW maximum
- Aging: ±3 ppm maximum first year
- Insulation resistance: 500 MΩ minimum at 100 Vdc ±15 V
- Reflow: 260 °C ±5 °C, 10 s max, 1 time
- Package size: 3.2 ±0.1 mm × 2.5 ±0.1 mm × 1.0 mm max
- Packaging suffix T: Tape and reel, 1000 pcs/reel
Pin configuration from datasheet
For the ABM8G 4-pad crystal, pins 1 and 3 are the crystal terminals. Pins 2 and 4 are GND/case pads. The datasheet notes that pin 1 is always located at the bottom-left relative to the top marking; a chamfer may appear on pin 4 without affecting electrical characteristics.
Schematic symbol cross-check
Observed schematic terminals:
Table
| Symbol terminal | Pin number | Observed role | Datasheet role | Result |
|---|---|---|---|---|
| XTAL_1 | 1 | Crystal terminal | Crystal terminal | Match |
| GND_1 | 2 | Ground | Ground/case | Match |
| XTAL_2 | 3 | Crystal terminal | Crystal terminal | Match |
| GND_2 | 4 | Ground | Ground/case | Match |
The electrical pin numbering and high-level roles match the datasheet. Pin Type is still
Unspecified on the symbol terminals; for a polished library part, pins 1 and 3 should be Passive/Bidirectional crystal terminals and pins 2 and 4 should be Ground/Power or Passive case-ground pads, depending on Flux library conventions.Footprint cross-check
Observed PCB footprint pads:
Table
| Pad | Position (mm) | Size (mm) | Shape | Layer |
|---|---|---|---|---|
| XTAL_1 / pin 1 | −1.1, −0.85 | 1.2 × 1.4 | Rectangle | Top |
| GND_2 / pin 4 | −1.1, +0.85 | 1.2 × 1.4 | Rectangle | Top |
| XTAL_2 / pin 3 | +1.1, +0.85 | 1.2 × 1.4 | Rectangle | Top |
| GND_1 / pin 2 | +1.1, −0.85 | 1.2 × 1.4 | Rectangle | Top |
This corresponds to a 2.2 mm x-pitch and 1.7 mm y-pitch, with 1.2 × 1.4 mm SMD rectangular pads. These values align with the ABM8G recommended land-pattern dimensions extracted from the datasheet text: 1.2 mm, 1.4 mm, 2.2 mm, and 1.7 mm. The pin-to-pad placement also matches the datasheet orientation mapping: pin 1 bottom-left, pin 2 bottom-right, pin 3 top-right, pin 4 top-left, using the footprint coordinate view.
Datasheet property update
The project originally had a Google Cloud-hosted datasheet PDF URL. I found the official Abracon datasheet and updated the project-level Datasheet URL to https://abracon.com/Resonators/ABM8G.pdf. I also set the same datasheet URL on the XTAL_1 terminal component while attempting to update part data; this terminal-level property is redundant and can be removed if strict symbol cleanliness is desired.
Mismatches / issues flagged
- No functional mismatch found in pin numbering or footprint pad geometry.
- Symbol pin types are unspecified, which is not ideal for library quality.
- Datasheet URL was present but was not the direct official Abracon URL; it has now been updated at project level.
- The project currently includes a redundant Datasheet URL property on terminal XTAL_1 from the update attempt; this does not affect electrical behavior but is not necessary.
Reviewed project information
Key datasheet specs
Pin configuration from datasheet
Schematic symbol cross-check
Footprint cross-check
Datasheet property update
Mismatches / issues flagged
