# 7M40000183

**TXC Corp** · Crystals · SMD3225-4P

7M40000183 from TXC Corp, in a SMD3225-4P. 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, connected to the crystal element in the internal view; load capacitance 6~20 pF. |
| 2 | GND | power_in | Ground pin, marked GND in the internal view connection diagram. |
| 3 | XTAL2 | passive | Crystal terminal 2, connected to the crystal element in the internal view; load capacitance 6~20 pF. |
| 4 | GND | power_in | Ground pin, marked GND in the internal view connection diagram. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TXC Corp |
| Package | SMD3225-4P |
| 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 | -20 |  | 20 | ppm | @-40~85°C | 1 |
| Frequency Stability over Operating Temp. Range (Reference 25℃) | ST | -30 |  | 30 | ppm | @-40~105°C | 1 |
| Operating Temperature | Topr | -40 | 25 | 105 | °C |  | 1 |
| Drive Level | DL |  | 100 | 300 | uW |  | 1 |
| Equivalent Series Resistance | ESR |  |  | 300 | Ohm | 8~12MHz | 1 |
| Equivalent Series Resistance | ESR |  |  | 80 | Ohm | 12~16MHz | 1 |
| Equivalent Series Resistance | ESR |  |  | 50 | Ohm | 16~40MHz | 1 |
| Equivalent Series Resistance | ESR |  |  | 30 | Ohm | >40MHz | 1 |
| Aging |  | -5 |  | 5 | ppm | 1st Year (±3, ±5 ppm) | 1 |
| Nominal Frequency | F | 8 |  | 80 | MHz | series range 8 ~ 80 MHz | 1 |
| Load Capacitance | CL | 6 |  | 20 | pF | 6~20 pF | 1 |

## CAD (KiCad official)

- Symbol: `7M40000183`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `7m40000183-etched.step` / `7m40000183-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7m40000183.step` / `7m40000183.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TXC Corp datasheet](docs/7m40000183-datasheet.pdf) (1 pp, sha256 `3c65c1d27a554a13`, retrieved 2026-10-22, 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/7m40000183-datasheet.pdf)