# 8Z40000030

**TXC Corp** · Crystals · SMD2520-4P

8Z40000030 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 1 (pin 1 marked by dot on lid) for the 40.000000 MHz fundamental AT-cut crystal, with 8 pF load capacitance specified. |
| 2 | GND | power_in | Ground connection, labelled GND in the connection diagram. |
| 3 | XTAL2 | passive | Second crystal terminal for the 40.000000 MHz fundamental AT-cut crystal, diagonal to pin 1. |
| 4 | GND | power_in | Ground connection, 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 Tolerance |  | -7 |  | 7 | ppm | at 25 ℃ ± 3 ℃ | 5 |
| Frequency Stability |  | -13 |  | 13 | ppm | over operating temperature range (reference 25℃) | 5 |
| Aging |  | -1 |  | 1 | ppm | 1st year | 5 |
| Operating Temperature |  | -40 |  | 90 | ℃ |  | 5 |
| Storage Temperature Range |  | -40 |  | 125 | ℃ | storage | 5 |
| Drive Level | DL |  |  | 100 | uW |  | 5 |
| Equivalent Series Resistance | Rr |  |  | 40 | Ω |  | 5 |
| Insulation Resistance |  | 500 |  |  | MΩ | at DC 100V | 5 |
| Shunt Capacitance | C0 |  |  | 3 | pF |  | 5 |
| Load Capacitance | CL |  | 8 |  | pF |  | 5 |
| Nominal Frequency | FL |  | 40 |  | MHz | fundamental mode, AT cut | 5 |
| Suggested reflow total time |  |  |  | 200 | sec | suggested reflow profile, total time | 6 |

## CAD (KiCad official)

- Symbol: `8Z40000030`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `8z40000030-etched.step` / `8z40000030-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `8z40000030.step` / `8z40000030.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/8588932596474920960) (11 pp, sha256 `7f8dcb4e03ce1406`, 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/8z40000030-datasheet.pdf)