# 3225-37.4-12-10-10

**Suzhou Liming Elec** · Crystals · SMD3225-4P

3225-37.4-12-10-10 from Suzhou Liming Elec, 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 3.2×2.5×0.7 mm fundamental-mode crystal unit, connected to the oscillation circuit (C1/RF side). |
| 2 | #2 | passive | Connected internally to pin #4 and to the metal cap (lid) on top; the datasheet does not state it is a signal terminal. |
| 3 | #3 | passive | Crystal terminal 2 of the 3.2×2.5×0.7 mm fundamental-mode crystal unit, connected to the oscillation circuit (C2 side). |
| 4 | #4 | passive | Connected internally to pin #2 and to the metal cap (lid) on top; the datasheet does not state it is a signal terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Suzhou Liming Elec |
| Package | SMD3225-4P |
| 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 |  | -10 |  | 10 | ppm | at 25°C | 1 |
| Frequency Stability vs. Temperature |  | -10 |  | 10 | ppm | over operating temperature range | 2 |
| Series Resistance | R |  |  | 50 | Ω | 27~60MHz | 1 |
| Drive Level |  |  | 10 | 200 | μW | 200μW max. | 1 |
| Operating Temperature Range |  | -40 |  | 85 | °C | options: -10~+60, -20~+70, -40~+85 | 1 |
| Storage Temperature Range |  | -55 |  | 125 | °C |  | 1 |
| Load Capacitance | CL |  | 12 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `3225-37.4-12-10-10`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `3225-37-4-12-10-10-etched.step` / `3225-37-4-12-10-10-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `3225-37-4-12-10-10.step` / `3225-37-4-12-10-10.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Suzhou Liming Elec datasheet](docs/3225-37-4-12-10-10-datasheet.pdf) (2 pp, sha256 `25e43438c5a0428e`, 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/3225-37-4-12-10-10-datasheet.pdf)