# OZ26000012

**TXC Corp** · Crystals · SMD2520-4P

OZ26000012 from TXC Corp, 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 | XT1 | passive | XTAL terminal 1 of the crystal resonator, one of the two crystal connections. |
| 2 | RT2 | passive | Thermistor terminal 2, which is also connected to the metal lid; the datasheet recommends connecting RT2 to GND. |
| 3 | XT2 | passive | XTAL terminal 2 of the crystal resonator, the second crystal connection. |
| 4 | RT1 | passive | Thermistor terminal 1, connected to the thermistor only and not to the metal lid. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TXC Corp |
| Package | SMD2520-4P |
| 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 | FT | -10 |  | 10 | ppm | @25°C±3°C | 1 |
| Frequency Stability, Over Operating Temp. Range (Reference 25℃) | ST | -12 |  | 12 | ppm | @-30~85°C | 1 |
| Operating Temperature | Topr | -30 | 25 | 85 | °C |  | 1 |
| Drive Level | DL |  | 100 | 200 | uW |  | 1 |
| Equivalent Series Resistance, 19.2MHz | ESR |  |  | 80 | Ohm | 19.2MHz | 1 |
| Equivalent Series Resistance, 26MHz | ESR |  |  | 50 | Ohm | 26MHz | 1 |
| Aging |  | -0.7 |  | 0.7 | ppm | 1st Year | 1 |
| Thermistor Resistance (25 ℃) |  |  | 100 |  | kOhm |  | 1 |
| Thermistor Resistance tolerance |  | -1 |  | 1 | % |  | 1 |
| B-Constant (25-50 ℃) |  |  | 4250 |  | K | Calculated from zero-power resistance values measured at 25°C and 50°C | 1 |
| B-Constant tolerance |  | -1 |  | 1 | % |  | 1 |

## CAD (KiCad official)

- Symbol: `OZ26000012`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `oz26000012-etched.step` / `oz26000012-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `oz26000012.step` / `oz26000012.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TXC Corp datasheet](docs/oz26000012-datasheet.pdf) (2 pp, sha256 `26c4d291b88cd784`, retrieved 2026-10-22, 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/oz26000012-datasheet.pdf)