# CJK02-327681220B20

**Changjing** · Crystals · DT-26

CJK02-327681220B20 from Changjing, in a DT-26. 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 | DT-26 |
| 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℃; printed ±20ppm | 2 |
| Series Resistance | Rr |  |  | 40 | KΩ |  | 2 |
| Turnover Temperature | To | -5 | 25 | 5 | ℃ | printed 25℃ ± 5℃; min/max are the printed ±5℃ | 2 |
| Temperature Coefficient (K) | K | -0.006 | -0.035 | 0.006 | ppm/℃2 | printed -0.035±0.006 ppm/℃2; min/max are the printed ±0.006 | 2 |
| Operation Temperature |  | -40 |  | 85 | ℃ |  | 2 |
| Preservation Temperature |  | -55 |  | 125 | ℃ | preservation (storage) temperature | 2 |
| Aging 1st Year | △f /f | -5 |  | 5 | ppm | 1st year; printed ±5 ppm max. | 2 |
| Shock Resistance (frequency change) |  | -5 |  | 5 | ppm | printed ±5 ppm max. | 2 |
| Drive Level |  |  |  | 1 | μW | less than 1.0μW recommended; more than 2.0μW cannot be guaranteed | 5 |
| Soldering Condition (lead parts) |  |  |  | 280 | ℃ | within 5 sec; or 260℃ within 10 sec | 4 |
| Nominal Frequency | F |  | 32.768 |  | KHz |  | 2 |
| Load Capacitance | CL |  | 12.5 |  | PF |  | 2 |

## CAD (KiCad official)

- Symbol: `CJK02-327681220B20`
- Footprint: `Crystal:Crystal_DS26_D2.0mm_L6.0mm_Vertical`
- 3D model: DT-26 (KiCad packages3D, STEP)
- 3D model files: `cjk02-327681220b20-etched.step` / `cjk02-327681220b20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjk02-327681220b20.step` / `cjk02-327681220b20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838642039316480) (5 pp, sha256 ``, retrieved 2026-10-14, 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/cjk02-327681220b20-datasheet.pdf)