# CJ03-076802020B20

**Changjiang Electronics Tech (CJ)** · Crystals · HC-49S-SMD

CJ03-076802020B20 from Changjiang Electronics Tech (CJ), 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 | Changjiang Electronics Tech (CJ) |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Frequency | f |  | 7.68 |  | MHz |  | 2 |
| Load Capacitance | CL |  | 20 |  | pF |  | 2 |
| Frequency Tolerance | △f/f | -20 |  | 20 | ppm |  | 2 |
| Frequency Temperature Stability |  | -20 |  | 20 | ppm | Ref.@25℃ | 2 |
| Resonance Resistance |  |  |  | 70 | ohm | Fundamental mode | 2 |
| Shunt Capacitance | C0 |  |  | 7 | pF |  | 2 |
| Drive Level | DL |  |  | 300 | μW |  | 2 |
| Operating Temperature Range | TOPR | -40 |  | 85 | °C |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 125 | °C |  | 2 |
| Insulation Resistance | IR | 500 |  |  | M ohms |  | 2 |
| Aging | △fA | -3 |  | 3 | ppm per Year |  | 2 |

## CAD (KiCad official)

- Symbol: `CJ03-076802020B20`
- Footprint: `Crystal:Crystal_SMD_HC49-SD`
- 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files: `cj03-076802020b20-etched.step` / `cj03-076802020b20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj03-076802020b20.step` / `cj03-076802020b20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/cj03-076802020b20-datasheet.pdf) (6 pp, sha256 ``, retrieved 2026-10-22, 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/cj03-076802020b20-datasheet.pdf)