# C3SB18.432F09M13

**CJKJ** · Crystals · SMD3225-4P

C3SB18.432F09M13 from CJKJ, in a SMD3225-4P. 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 1, connected to one side of the quartz element (18.432000 MHz, CL 09 pF, Rr max 40 ohm). |
| 2 | GND | power_in | Pad labeled GND in the connection diagram, connected to the package lid/ground. |
| 3 | XTAL2 | passive | Crystal terminal 2, connected to the opposite side of the quartz element (18.432000 MHz, CL 09 pF, Rr max 40 ohm). |
| 4 | GND | power_in | Pad labeled GND in the connection diagram, connected to the package lid/ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CJKJ |
| Package | SMD3225-4P |
| Category | Resonators/Oscillators |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal frequency | FL |  | 18.432 |  | MHz |  | 3 |
| Frequency tolerance at 25℃ |  | -10 |  | 10 | ppm | At 25℃ | 3 |
| Frequency deviation over operating temperature |  | -30 |  | 30 | ppm | Topr -40 ~ 85 ℃ | 3 |
| Aging rate |  | -3 |  | 3 | ppm | Per year | 3 |
| Equivalent series resistance | Rr |  |  | 40 | Ω |  | 3 |
| Shunt capacitance | C0 |  |  | 5 | pF |  | 3 |
| Drive level | DL |  | 100 | 200 | uW |  | 3 |
| Insulation resistance | Rins | 500 |  |  | MΩ | at DC 100V | 3 |
| Operating temperature range | Topr | -40 |  | 85 | ℃ |  | 3 |
| Storage temperature range | Tstg | -55 |  | 125 | ℃ |  | 3 |
| Frequency change after free fall | FL | -5 |  | 5 | ppm | Free fall 75cm, 3 times | 5 |
| Frequency change after vibration | FL | -5 |  | 5 | ppm | Vibration 10~55Hz, 1.5mm, 30 min | 5 |
| Frequency change after damp heat | FL | -5 |  | 5 | ppm | +40±2℃, 90%~95% RH, 250 h | 5 |
| Frequency change after low temperature | FL | -5 |  | 5 | ppm | -40±2℃, 250 h | 5 |
| Frequency change after high temperature | FL | -5 |  | 5 | ppm | +85±2℃, 250 h | 5 |
| Frequency change after temperature cycling | FL | -5 |  | 5 | ppm | -30±3℃/30±3 min to +85±2℃/30±3 min, 5 cycles | 5 |
| Frequency change after sealing test | FL | -5 |  | 5 | ppm | 0.4-0.5Mpa, 10 min; IR≧500MΩ | 5 |
| Frequency change after soldering | FL | -5 |  | 5 | ppm | 235±5℃, 3 s | 5 |
| Frequency change after reflow | FL | -5 |  | 5 | ppm | Reflow, 2 cycles | 5 |

## CAD (KiCad official)

- Symbol: `C3SB18.432F09M13`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `c3sb18-432f09m13-etched.step` / `c3sb18-432f09m13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `c3sb18-432f09m13.step` / `c3sb18-432f09m13.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CJKJ datasheet](docs/c3sb18-432f09m13-datasheet.pdf) (8 pp, sha256 `39300711c55e8216`, retrieved 2026-11-06, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/c3sb18-432f09m13-datasheet.pdf)