# CJK07-327681220B20

**Changjing** · Crystals · SMD3215-2P

CJK07-327681220B20 from Changjing, in a SMD3215-2P. 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 | Terminal 1 of a two-terminal crystal; either orientation. |
| 2 | 2 | passive | Terminal 2 of a two-terminal crystal; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SMD3215-2P |
| Category | Crystals/Oscillators/Resonators |
| Pins | 2 |

## 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℃ |  | -20 |  | 20 | ppm | at 25℃ | 2 |
| Series Resistance | Rr |  |  | 70 | KΩ |  | 2 |
| Operation Temperature |  | -40 |  | 85 | ℃ |  | 2 |
| Preservation Temperature |  | -55 |  | 125 | ℃ |  | 2 |
| Aging 1st Year | △f /f | -5 |  | 5 | ppm | 1st year | 2 |
| Shock Resistance |  | -5 |  | 5 | ppm |  | 2 |
| Temperature Coefficient | K | -0.006 | -0.035 | 0.006 | ppm/℃2 |  | 2 |
| Turnover Temperature | To | -5 | 25 | 5 | ℃ |  | 2 |
| Insulation Resistance |  | 500 |  |  | MΩ | at DC 100V±15V | 2 |
| Load Capacitance | CL |  | 12.5 |  | PF |  | 2 |
| Shunt Capacitance | CO |  | 1.5 |  | PF |  | 2 |
| Nominal Frequency | F |  | 32.768 |  | KHz |  | 2 |
| Capacitance Ratio | C0/C1 |  | 520 |  |  |  | 2 |
| Quality Factor | Q |  | 60 |  | K |  | 2 |
| Drive Level |  |  | 1 |  | μW |  | 2 |

## CAD (KiCad official)

- Symbol: `CJK07-327681220B20`
- Footprint: `Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm`
- 3D model: SMD3215-2P (KiCad packages3D, STEP)
- 3D model files: `cjk07-327681220b20-etched.step` / `cjk07-327681220b20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjk07-327681220b20.step` / `cjk07-327681220b20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/cjk07-327681220b20-datasheet.pdf) (6 pp, sha256 ``, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `crystal numbering` (convention), consensus `off` (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/cjk07-327681220b20-datasheet.pdf)