# ECS-.327-12.5-34QN-TR

**ECS** · Pre-ordered Products · SMD3215-2P

ECS-.327-12.5-34QN-TR from ECS, in a SMD3215-2P. 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 | In/Out | passive | Crystal terminal labeled In/Out in the datasheet pad connections; the datasheet states no voltage or current limit for this pad. |
| 2 | Out/In | passive | Crystal terminal labeled Out/In in the datasheet pad connections; the datasheet states no voltage or current limit for this pad. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECS |
| Package | SMD3215-2P |
| Category | Solders / Accessories / Batteries |
| 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 @ +25°C |  | -20 |  | 20 | ppm | @ +25°C | 1 |
| Aging (First Year) |  | -3 |  | 3 | ppm | @ +25°C ±3°C | 1 |
| Operating Temperature (N option) |  | -40 |  | 85 | °C | N option (part-numbering guide: N = -40 ~ +85°C) | 1 |
| Storage Temperature |  | -55 |  | 125 | °C |  | 1 |
| Drive Level | DL | 0.1 |  | 0.5 | µW |  | 1 |
| Turnover Temperature |  | 20 | 25 | 30 | °C |  | 1 |
| Temperature Coefficient |  | -0.028 | -0.034 | -0.04 | Ppm/°C2 |  | 1 |
| Frequency | Fo |  | 32.768 |  | KHz |  | 1 |
| Load Capacitance |  |  | 12.5 |  | pF | Specify in P/N | 1 |
| Equivalent Series Resistance | R1 |  | 70 |  | KΩ |  | 1 |
| Shunt Capacitance | CO |  | 1.1 |  | pF |  | 1 |
| Motional Capacitance | C1 |  | 3.5 |  | fF |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | gold | MSL 1, Lead Finish Au POCKET TAPE DIMENSIONS (mm) | 2 |

## CAD (KiCad official)

- Symbol: `ECS-.327-12.5-34QN-TR`
- Footprint: `Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm`
- 3D model: SMD3215-2P (KiCad packages3D, STEP)
- 3D model files: `ecs-327-12-5-34qn-tr-etched.step` / `ecs-327-12-5-34qn-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-327-12-5-34qn-tr.step` / `ecs-327-12-5-34qn-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](docs/ecs-327-12-5-34qn-tr-datasheet.pdf) (2 pp, sha256 `fe3b0dfbe43bef25`, retrieved 2026-11-05, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/ecs-327-12-5-34qn-tr-datasheet.pdf)