# C3SB8.000F20E12

**Chuanjing Tech.** · Crystals · SMD3225-4P

C3SB8.000F20E12 from Chuanjing 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 connected to one side of the resonator in the connection diagram (8.000 MHz fundamental, CL 20 pF). |
| 2 | GND | power_in | Marked GND in the connection diagram; case/ground pad not connected to the resonator. |
| 3 | XTAL2 | passive | Crystal terminal connected to the other side of the resonator in the connection diagram (8.000 MHz fundamental, CL 20 pF). |
| 4 | GND | power_in | Marked GND in the connection diagram; case/ground pad not connected to the resonator. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Chuanjing Tech. |
| 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 room temperature |  | -10 |  | 10 | ppm | 常温频差范围 (room temperature) | 3 |
| Frequency tolerance over temperature range | Topr | -20 |  | 20 | ppm | Topr -20 ~ 70 ℃ | 3 |
| Insulation resistance | Rins | 500 |  |  | MΩ | at DC 100V | 3 |
| Aging rate |  | -3 |  | 3 | ppm | Per year | 3 |
| Drive level | DL |  | 100 | 200 | uW | Remark as printed: MAX 200uW | 3 |
| Equivalent series resistance | Rr |  |  | 250 | Ω |  | 3 |
| Shunt capacitance | C0 |  |  | 2 | pF | MAX as printed in remark | 3 |
| Storage temperature | Tstg | -40 |  | 85 | ℃ |  | 3 |
| Operating temperature | Topr | -20 |  | 70 | ℃ |  | 3 |
| Product weight |  |  | 0.018 | 0.018 | g | MAX as printed in remark | 3 |
| Nominal frequency | FL |  | 8 |  | MHz | 标示频率 (marked frequency), AT fundamental | 3 |
| Load capacitance | CL |  | 20 |  | pF |  | 3 |

## CAD (KiCad official)

- Symbol: `C3SB8.000F20E12`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `c3sb8-000f20e12-etched.step` / `c3sb8-000f20e12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `c3sb8-000f20e12.step` / `c3sb8-000f20e12.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Chuanjing Tech. datasheet](docs/c3sb8-000f20e12-datasheet.pdf) (8 pp, sha256 `58388f489e03a3d5`, retrieved 2026-10-21, 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/c3sb8-000f20e12-datasheet.pdf)