# CJ03-080002010A20

**Changjing** · Crystals · HC-49S-SMD

CJ03-080002010A20 from Changjing, in a HC-49S-SMD. 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 | HC-49S-SMD |
| 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 | Δf/f | -10 |  | 10 | ppm |  | 2 |
| Frequency temperature stability |  | -20 |  | 20 | ppm |  | 2 |
| Aging | △fA | -3 |  | 3 | ppm per Year |  | 2 |
| Resonance resistance |  |  |  | 80 | ohms |  | 2 |
| Shunt capacitance | C0 |  |  | 7 | pF |  | 2 |
| Drive level | DL |  |  | 300 | μW |  | 2 |
| Insulation resistance | IR | 500 |  |  | M ohms |  | 2 |
| Operating temperature range | TOPR | -20 |  | 70 | °C |  | 2 |
| Storage temperature range | TSTG | -55 |  | 125 | °C |  | 2 |
| Nominal frequency | f |  | 8 |  | MHz |  | 2 |
| Load capacitance | CL |  | 20 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `CJ03-080002010A20`
- Footprint: `Crystal:Crystal_SMD_HC49-SD`
- 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files: `cj03-080002010a20-etched.step` / `cj03-080002010a20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj03-080002010a20.step` / `cj03-080002010a20.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/8590162557152894976) (6 pp, sha256 ``, retrieved 2026-10-15, 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/cj03-080002010a20-datasheet.pdf)