# CJ16-260000310B20

**Changjing** · Crystals · SMD2016-4P

CJ16-260000310B20 from Changjing, in a SMD2016-4P. 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 | XTAL1 | passive | Crystal terminal connected to one side of the resonator (pad 1, marked with the corner chamfer) for the 26MHz, 3.7pF load capacitance fundamental-mode crystal. |
| 2 | GND | power_in | Ground pad, connected to the case/ground per the connection diagram. |
| 3 | XTAL2 | passive | Crystal terminal connected to the other side of the resonator (pad 3) for the 26MHz, 3.7pF load capacitance fundamental-mode crystal. |
| 4 | GND | power_in | Ground pad, connected to the case/ground per the connection diagram. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SMD2016-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| Pins | 4 |

## 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 |
| Resonance Resistance |  |  |  | 100 | ohm |  | 2 |
| Shunt Capacitance | C0 |  |  | 2 | pF | <2pF | 2 |
| Drive Level | DL |  |  | 100 | μW | <100μW | 2 |
| Insulation Resistance | IR | 500 |  |  | M ohm | >500 M ohms | 2 |
| Aging | ΔfA | -3 |  | 3 | ppm per Year |  | 2 |
| Operating Temperature Range | TOPR | -40 |  | 85 | °C |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 125 | °C |  | 2 |
| Nominal Frequency | f |  | 26 |  | MHz | Fundamental mode | 2 |
| Load Capacitance | CL |  | 3.7 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `CJ16-260000310B20`
- Footprint: `Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm`
- 3D model: SMD2016-4P (KiCad packages3D, STEP)
- 3D model files: `cj16-260000310b20-etched.step` / `cj16-260000310b20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj16-260000310b20.step` / `cj16-260000310b20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/cj16-260000310b20-datasheet.pdf) (5 pp, sha256 `6c2fd55eba32c3a7`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (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/cj16-260000310b20-datasheet.pdf)