component
CJ03-041942020A20
Public Made by Adomby adom
Changjing Crystals, HC-49S-SMD. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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CJ03-041942020A20
Changjing · Crystals · HC-49S-SMD
CJ03-041942020A20 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 | Crystal Oscillator/Oscillator/Resonator |
| 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 | △f/f | -20 | 20 | ppm | 2 | ||
| Frequency Temperature Stability | -20 | 20 | ppm | 2 | |||
| Resonance Resistance | 80 | ohm | Fundamental mode | 2 | |||
| Shunt Capacitance | C0 | 7 | pF | <7pF | 2 | ||
| Drive Level | DL | 300 | μW | <300μW | 2 | ||
| Insulation Resistance | IR | 500 | M ohms | >500 M ohms | 2 | ||
| Aging | △fA | -3 | 3 | ppm per Year | 2 | ||
| Operating Temperature Range | TOPR | -20 | 70 | °C | 2 | ||
| Storage Temperature Range | TSTG | -55 | 125 | °C | 2 | ||
| Nominal Frequency | f | 4.1943 | MHz | 2 | |||
| Load Capacitance | CL | 20 | pF | 2 |
CAD (KiCad official)
- Symbol:
CJ03-041942020A20 - Footprint:
Crystal:Crystal_SMD_HC49-SD - 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files:
cj03-041942020a20-etched.step/cj03-041942020a20-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj03-041942020a20.step/cj03-041942020a20.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (6 pp, sha256 ``, retrieved 2026-10-22, tier: lcsc)
- Extractor: parts-factory
2.0.0/extract_pins, primarycrystal numbering(convention), consensusoff(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).
# CJ03-041942020A20
**Changjing** · Crystals · HC-49S-SMD
CJ03-041942020A20 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 | Crystal Oscillator/Oscillator/Resonator |
| 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 | △f/f | -20 | | 20 | ppm | | 2 |
| Frequency Temperature Stability | | -20 | | 20 | ppm | | 2 |
| Resonance Resistance | | | | 80 | ohm | Fundamental mode | 2 |
| Shunt Capacitance | C0 | | | 7 | pF | <7pF | 2 |
| Drive Level | DL | | | 300 | μW | <300μW | 2 |
| Insulation Resistance | IR | 500 | | | M ohms | >500 M ohms | 2 |
| Aging | △fA | -3 | | 3 | ppm per Year | | 2 |
| Operating Temperature Range | TOPR | -20 | | 70 | °C | | 2 |
| Storage Temperature Range | TSTG | -55 | | 125 | °C | | 2 |
| Nominal Frequency | f | | 4.1943 | | MHz | | 2 |
| Load Capacitance | CL | | 20 | | pF | | 2 |
## CAD (KiCad official)
- Symbol: `CJ03-041942020A20`
- Footprint: `Crystal:Crystal_SMD_HC49-SD`
- 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files: `cj03-041942020a20-etched.step` / `cj03-041942020a20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj03-041942020a20.step` / `cj03-041942020a20.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](docs/cj03-041942020a20-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/cj03-041942020a20-datasheet.pdf)