# M12000J008

**ECEC ZheJiang E ast Crystal Elec** · Crystals · SMD3225-4P

M12000J008 from ECEC ZheJiang E ast Crystal Elec, 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 | XTAL1 | passive | Connected to the quartz element (crystal terminal). |
| 2 | GND | passive | Connected to the cover (metal lid), typically grounded. |
| 3 | XTAL2 | passive | Connected to the quartz element (crystal terminal). |
| 4 | GND | passive | Connected to the cover (metal lid), typically grounded. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECEC ZheJiang E ast Crystal Elec |
| Package | SMD3225-4P |
| Category | Crystals, Oscillators, Resonators |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `M12000J008`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `m12000j008-etched.step` / `m12000j008-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `m12000j008.step` / `m12000j008.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [ECEC ZheJiang E ast Crystal Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588943723472564224) (1 pp, sha256 `4c318ceaa74fdda3`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/m12000j008-datasheet.pdf)