# ECS-.327-12.5-13X-C

**ECS** · Crystals · DT-26

ECS-.327-12.5-13X-C from ECS, in a DT-26. 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 | Terminal 1 of a two-terminal crystal; either orientation. |
| 2 | 2 | passive | Terminal 2 of a two-terminal crystal; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECS |
| Package | DT-26 |
| Category | Crystal Oscillator/Oscillator/Resonator |
| 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 | Δf/fo | -10 |  | 10 | ppm |  | 1 |
| Resistance at Series Resonance | R1 |  |  | 35 | KΩ |  | 1 |
| Drive Level | DL |  |  | 1 | μW | max | 1 |
| Temperature Coefficient | ß |  |  | -0.04 | ppm/°C2 | -0.040 max. | 1 |
| Operating Temperature | Topr | -20 |  | 70 | °C |  | 1 |
| Storage Temperature | Tstg | -40 |  | 85 | °C |  | 1 |
| Shock Resistance |  | -5 |  | 5 | ppm | Drop 3 times on hard wooden board from height of 75cm | 1 |
| Insulation Resistance | IR | 500 |  |  | MΩ | DC100V | 1 |
| Aging (First Year) | Δf/fo | -3 |  | 3 | ppm | @ +25°C ±3°C | 1 |
| Nominal Frequency | FO |  | 32.768 |  | KHz |  | 1 |
| Load Capacitance | CL |  | 12.5 |  | pF |  | 1 |
| Q-Factor | Q |  | 70000 |  |  |  | 1 |
| Shunt Capacitance | CO |  | 1.35 |  | pF |  | 1 |
| Capacitance Ratio |  |  | 450 |  |  |  | 1 |
| Motional Capacitance | C1 |  | 0.003 |  | pF |  | 1 |

## CAD (KiCad official)

- Symbol: `ECS-.327-12.5-13X-C`
- Footprint: `Crystal:Crystal_DS26_D2.0mm_L6.0mm_Vertical`
- 3D model: DT-26 (KiCad packages3D, STEP)
- 3D model files: `ecs-327-12-5-13x-c-etched.step` / `ecs-327-12-5-13x-c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-327-12-5-13x-c.step` / `ecs-327-12-5-13x-c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](docs/ecs-327-12-5-13x-c-datasheet.pdf) (1 pp, sha256 ``, retrieved 2026-10-31, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `crystal numbering` (convention), consensus `off` (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-327-12-5-13x-c-datasheet.pdf)