# 8Z40000017

**TXC Corp** · Crystals · SMD2520-4P

8Z40000017 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 | XTAL1 | passive | Crystal terminal for the 40.000000MHz fundamental AT-cut crystal (12 pF load capacitance); it is the pin-1 corner marked on the package and is connected to the crystal element in the connection diagram. |
| 2 | GND | power_in | Ground connection (case/lid ground) as labelled GND in the connection diagram. |
| 3 | XTAL2 | passive | Second crystal terminal for the 40.000000MHz fundamental crystal, diagonal to pin 1 in the connection diagram. |
| 4 | GND | power_in | Ground connection (case/lid ground) as labelled GND in the connection diagram. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TXC Corp |
| 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 Stability |  | -15 |  | 15 | ppm | Over Operating Temp. Range (Reference 25℃) | 4 |
| Insulation Resistance |  | 500 |  |  | MΩ | at DC 100V | 4 |
| Aging |  | -3 |  | 3 | ppm | 1st Year | 4 |
| Frequency Tolerance |  | -5 |  | 5 | ppm | at 25 ℃ ± 3 ℃ | 4 |
| Equivalent Series Resistance | ESR |  |  | 50 | Ω |  | 4 |
| Nominal Frequency | FL |  | 40 |  | MHz |  | 4 |
| Storage Temperature Range |  | -40 |  | 105 | ℃ |  | 4 |

## CAD (KiCad official)

- Symbol: `8Z40000017`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `8z40000017-etched.step` / `8z40000017-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `8z40000017.step` / `8z40000017.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TXC Corp datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588947138248118272) (8 pp, sha256 `691a51cf3f1ede77`, retrieved 2026-10-15, tier: lcsc)
- **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/8z40000017-datasheet.pdf)