# CF4012M00012T5074049

**JWT** · Crystals · SMD3225-4P

CF4012M00012T5074049 from JWT, 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 (pin-1 notched pad), connected to one side of the 12.000 MHz AT-cut resonator with CL 12 pF. |
| 2 | GND | power_in | Connected to ground (GND) per the Top View Crystal Connection drawing; not connected to the resonator. |
| 3 | XTAL2 | passive | Crystal terminal 2, connected to the other side of the 12.000 MHz AT-cut resonator with CL 12 pF. |
| 4 | GND | power_in | Connected to ground (GND) per the Top View Crystal Connection drawing; not connected to the resonator. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JWT |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency tolerance (at 25±2℃) | FL | -10 |  | 10 | ppm | 25±2℃ | 4 |
| Temperature frequency deviation | TC | -30 |  | 30 | ppm | 基准温度：25℃ | 4 |
| Drive level | DL | 1 | 100 | 300 | uW |  | 4 |
| Motional (series) resistance | RR |  |  | 80 | Ω |  | 4 |
| Shunt capacitance | C0 |  |  | 3 | pF |  | 4 |
| Insulation resistance | IR | 500 |  |  | MΩ | at DC 100V | 4 |
| Spurious attenuation | SPDB |  |  | -3 | dB | -1000ppm～6500ppm | 4 |
| Aging rate |  | -2 |  | 2 | ppm | 1st year max | 4 |
| Operating temperature |  | -40 |  | 85 | ℃ |  | 4 |
| Storage temperature range |  | -55 |  | 125 | ℃ |  | 4 |
| Nominal frequency | F0 |  | 12 |  | MHz |  | 4 |
| Load capacitance | CL |  | 12 |  | pF |  | 4 |

## CAD (KiCad official)

- Symbol: `CF4012M00012T5074049`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `cf4012m00012t5074049-etched.step` / `cf4012m00012t5074049-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cf4012m00012t5074049.step` / `cf4012m00012t5074049.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JWT datasheet](docs/cf4012m00012t5074049-datasheet.pdf) (10 pp, sha256 `d61f4eb12c2e1fb4`, retrieved 2026-10-22, 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/cf4012m00012t5074049-datasheet.pdf)