# 7M12000009

**TXC Corp** · Crystals · SMD3225-4P

7M12000009 from TXC Corp, 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 | 1 | passive | Crystal terminal of the 12.000000 MHz fundamental-mode AT-cut crystal (CL 20 pF, drive level 100 uW max). |
| 2 | GND | power_in | Marked GND in the connection drawing; connects to the metal lid/ground. |
| 3 | 3 | passive | Second crystal terminal of the 12.000000 MHz fundamental-mode AT-cut crystal (ESR 100 ohm max, C0 5 pF max). |
| 4 | GND | power_in | Marked GND in the connection drawing; connects to the metal lid/ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TXC Corp |
| Package | SMD3225-4P |
| Category | Crystals/Oscillators/Resonators |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Nominal Frequency | FL |  | 12 |  | MHz |  | 5 |
| Frequency Tolerance |  | -20 |  | 20 | ppm | at 25 ℃ ± 3 ℃ | 5 |
| Frequency Stability |  | -20 |  | 20 | ppm | Over Operating Temp. Range (Reference 25℃) | 5 |
| Aging |  | -5 |  | 5 | ppm | 1st Year | 5 |
| Operating Temperature |  | -10 |  | 70 | ℃ |  | 5 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 5 |
| Effective Resistance | Rr |  |  | 100 | Ω |  | 5 |
| Shunt Capacitance | C0 |  |  | 5 | pF |  | 5 |
| Drive Level | DL |  |  | 100 | uW |  | 5 |
| Insulation Resistance |  | 500 |  |  | MΩ | at DC 100V | 5 |
| Load Capacitance | CL |  | 20 |  | pF | Fundamental | 5 |

## CAD (KiCad official)

- Symbol: `7M12000009`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `7m12000009-etched.step` / `7m12000009-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7m12000009.step` / `7m12000009.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TXC Corp datasheet](docs/7m12000009-datasheet.pdf) (11 pp, sha256 `a1b3211d9b84c42e`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/7m12000009-datasheet.pdf)