# TC25A026000GECN111

**TKD** · Oscillators · SMD2520-4P

TC25A026000GECN111 from TKD, in a SMD2520-4P. 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 | NC/GND | passive | Pin 1 is either no-connect or ground; the datasheet recommends connecting it to GND. |
| 2 | GND | power_in | Ground connection for the oscillator. |
| 3 | Fout | output | Clipped sine output of 0.8 Vp-p into a 10kΩ//10pF load; no DC-cut capacitor inside, so add one above 1nF in the output line. |
| 4 | Vcc | power_in | Supply voltage of 1.71 to 1.89 V (1.80 V typical), selectable range 1.7 to 3.6 V, with 2.0 mA maximum current consumption. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TKD |
| Package | SMD2520-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency Stability vs Temperature |  | -2 |  | 2 | ppm | @-40℃~-30℃ | 3 |
| Frequency Stability vs Temperature |  | -0.5 |  | 0.5 | ppm | @-30℃~85℃ | 3 |
| Frequency Stability vs Load |  | -0.2 |  | 0.2 | ppm | ±10% | 3 |
| Frequency Stability vs Supply Voltage |  | -0.2 |  | 0.2 | ppm | Standard Vcc±5% | 3 |
| Operating Temperature Range |  | -40 |  | 85 | ℃ |  | 3 |
| Frequency Tolerance |  | -2 |  | 2 | ppm | Refer to nominal frequency | 3 |
| Supply Voltage | Vcc | 1.71 | 1.8 | 1.89 | V |  | 3 |
| Current Consumption |  |  |  | 2 | mA |  | 3 |
| Duty Cycle |  | 40 | 50 | 60 | % |  | 3 |
| Aging |  | -1 |  | 1 | ppm | 1st year@25℃ | 3 |
| Start-up Time |  |  |  | 2 | ms | To 90% of Vp-p | 3 |
| Storage Temperature |  | -40 |  | 85 | ℃ |  | 3 |
| Nominal Frequency |  |  | 26 |  | MHz |  | 3 |
| Output Level |  |  | 0.8 |  | Vp-p |  | 3 |
| Phase Noise |  |  | -96 |  | dBc/Hz | @10 Hz offset | 3 |
| Phase Noise |  |  | -121 |  | dBc/Hz | @100 Hz offset | 3 |
| Phase Noise |  |  | -140 |  | dBc/Hz | @1 kHz offset | 3 |
| Phase Noise |  |  | -150 |  | dBc/Hz | @10 kHz offset | 3 |
| Phase Noise |  |  | -155 |  | dBc/Hz | @100 kHz offset | 3 |
| Phase Noise |  |  | -156 |  | dBc/Hz | @1 MHz offset | 3 |

## CAD (KiCad official)

- Symbol: `TC25A026000GECN111`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `tc25a026000gecn111-etched.step` / `tc25a026000gecn111-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tc25a026000gecn111.step` / `tc25a026000gecn111.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TKD datasheet](docs/tc25a026000gecn111-datasheet.pdf) (10 pp, sha256 `a657f26067ee0bcc`, 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/tc25a026000gecn111-datasheet.pdf)