# 7U40000E09UCG

**SJK(SHENZHEN CRYSTAL TECH)** · Crystals · SMD3225-4P

7U40000E09UCG from SJK(SHENZHEN CRYSTAL TECH), 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 | Crystal terminal 1 of the 40.000MHz AT-fundamental crystal with 9.0 pF load capacitance, connected to the crystal element in the Top View Crystal Connection drawing. |
| 2 | GND | power_in | Pin 2 is labelled GND in the Top View Crystal Connection drawing and is not connected to the crystal element. |
| 3 | XTAL2 | passive | Crystal terminal 2 of the 40.000MHz AT-fundamental crystal with 9.0 pF load capacitance, connected to the crystal element in the Top View Crystal Connection drawing. |
| 4 | GND | power_in | Pin 4 is labelled GND in the Top View Crystal Connection drawing and is not connected to the crystal element. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SJK(SHENZHEN CRYSTAL TECH) |
| Package | SMD3225-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `7U40000E09UCG`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `7u40000e09ucg-etched.step` / `7u40000e09ucg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7u40000e09ucg.step` / `7u40000e09ucg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SJK(SHENZHEN CRYSTAL TECH) datasheet](docs/7u40000e09ucg-datasheet.pdf) (4 pp, sha256 `616d9aba699e2c4f`, retrieved 2026-11-02, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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).

[Datasheet PDF](docs/7u40000e09ucg-datasheet.pdf)