# 1C218432CC0J

**KDS Daishinku** · Crystals · SMD3225-4P

1C218432CC0J from KDS Daishinku, 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 | 1 | passive | Crystal terminal #1 of the DSX321G 18.432 MHz fundamental crystal, load capacitance 10.0 pF. |
| 2 | 2 | unconnected | Datasheet states pin #2 is either not connected with anything or must be connected with GND (both statements printed, selection not distinguishable). |
| 3 | 3 | passive | Crystal terminal #3 of the DSX321G 18.432 MHz fundamental crystal, load capacitance 10.0 pF. |
| 4 | 4 | unconnected | Datasheet states pin #4 is either not connected with anything or must be connected with GND (both statements printed, selection not distinguishable). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KDS Daishinku |
| Package | SMD3225-4P |
| Category | Crystals/Oscillators/Resonators |
| 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 |  | -30 |  | 30 | ×10-6 | at 25 deg.C +/- 3 deg.C | 1 |
| Frequency characteristics over temperature |  | -30 |  | 30 | ×10-6 | -20 deg.C to +75 deg.C (ref. +25 deg.C) | 1 |
| Series resistance |  |  |  | 80 | ohms | CL = SERIES | 1 |
| Shunt capacitance | C0 |  |  | 2 | pF |  | 1 |
| Insulation resistance |  | 500 |  |  | Mohms | at 100V DC | 1 |
| Operating temperature range |  | -20 |  | 75 | deg.C |  | 1 |
| Storage temperature range |  | -40 |  | 85 | deg.C |  | 1 |
| Drive level |  | 8 | 10 | 12 | uW | 10 uW +/- 2 uW | 1 |
| Load capacitance | CL |  | 10 |  | pF |  | 1 |
| Nominal frequency |  |  | 18.432 |  | MHz | Fundamental; value from Fig-1 marking 18.432000 | 1 |

## CAD (KiCad official)

- Symbol: `1C218432CC0J`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `1c218432cc0j-etched.step` / `1c218432cc0j-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1c218432cc0j.step` / `1c218432cc0j.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KDS Daishinku datasheet](docs/1c218432cc0j-datasheet.pdf) (1 pp, sha256 `a0aaa6c70b06b453`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/1c218432cc0j-datasheet.pdf)