# SX25Y026000B71T

**TKD** · Crystals · SMD2520-4P

SX25Y026000B71T 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 | XTAL1 | passive | Crystal terminal (pins 1 and 3 are the crystal connections); the 26.000MHz fundamental AT-cut crystal is specified for 7pF load capacitance. |
| 2 | GND | power_in | Ground connection (pins 2 and 4 are GND) on the ceramic package. |
| 3 | XTAL2 | passive | Crystal terminal (pins 1 and 3 are the crystal connections); drive level 100uW max. |
| 4 | GND | power_in | Ground connection (pins 2 and 4 are GND) on the ceramic package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TKD |
| Package | SMD2520-4P |
| 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 |  | -10 |  | 10 | ppm | at 25℃± 3℃ | 4 |
| Frequency Stability |  | -10 |  | 10 | ppm | -20℃ ~ +75℃ | 4 |
| Aging |  | -3 |  | 3 | ppm/Year |  | 4 |
| Equivalent Series Resistance | ESR |  |  | 50 | Ω |  | 4 |
| Shunt Capacitance | C0 |  |  | 3 | pF |  | 4 |
| Insulation resistance |  | 500 |  |  | MΩ | DC 100V | 4 |
| Drive Level |  |  |  | 100 | uW |  | 4 |
| Operating Temperature |  | -20 |  | 75 | ℃ |  | 4 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 4 |
| Nominal Frequency |  |  | 26 |  | MHz | Fundamental, AT cut | 4 |
| Load Capacitance | CL |  | 7 |  | pF |  | 4 |

## CAD (KiCad official)

- Symbol: `SX25Y026000B71T`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `sx25y026000b71t-etched.step` / `sx25y026000b71t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sx25y026000b71t.step` / `sx25y026000b71t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TKD datasheet](docs/sx25y026000b71t-datasheet.pdf) (11 pp, sha256 `476b2d112cda59be`, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sx25y026000b71t-datasheet.pdf)