# TX322540M4HBDD2T

**Yajingxin** · Crystals · SMD3225-4P

TX322540M4HBDD2T from Yajingxin, 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 (chamfered pad), connected across the quartz element to pin 3, for 40.000000 MHz fundamental mode at 15 pF load capacitance. |
| 2 | GND | power_in | Ground connection pin (lid/case ground) shown as GND in the connection top view. |
| 3 | XTAL2 | passive | Crystal terminal 2, connected across the quartz element to pin 1, with drive level max 100 uW and ESR max 30 ohm. |
| 4 | GND | power_in | Ground connection pin (lid/case ground) shown as GND in the connection top view. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yajingxin |
| Package | SMD3225-4P |
| 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 at 25℃ (調整頻差) |  | -10 |  | 10 | ppm | at 25℃ | 2 |
| Stability over operation temperature (温度頻差) |  | -20 |  | 20 | ppm | over operation temperature range | 2 |
| Aging |  | -3 |  | 3 | ppm/year |  | 2 |
| Shunt capacitance (Co) | Co | 0 |  | 5 | pF |  | 2 |
| Insulation resistance |  | 500 |  |  | MΩ | at DC 100V | 2 |
| Equivalent resistance (ESR) |  |  |  | 30 | Ω |  | 2 |
| Drive level |  |  |  | 100 | uw |  | 2 |
| Nominal frequency |  |  | 40 |  | MHz |  | 2 |
| Load capacitance (CL) | CL |  | 15 |  | pF |  | 2 |
| Operating temperature range |  | -30 |  | 85 | ℃ |  | 2 |
| Storage temperature range |  | -45 |  | 85 | ℃ |  | 2 |
| Peak/classification temperature (Tp) |  |  |  | 260 | ℃ | Pb-free reflow profile | 3 |
| Suggested reflow times |  |  |  | 3 | Times | maximum suggested reflow count | 3 |
| Average ramp-up rate (Ts max to Tp) |  |  |  | 3 | ℃/second |  | 3 |
| Ramp-down rate |  |  |  | 6 | ℃/second |  | 3 |
| Time 25℃ to peak temperature |  |  |  | 8 | minutes |  | 3 |

## CAD (KiCad official)

- Symbol: `TX322540M4HBDD2T`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tx322540m4hbdd2t-etched.step` / `tx322540m4hbdd2t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tx322540m4hbdd2t.step` / `tx322540m4hbdd2t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yajingxin datasheet](docs/tx322540m4hbdd2t-datasheet.pdf) (5 pp, sha256 `e77af83ccaed9726`, retrieved 2026-10-21, 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/tx322540m4hbdd2t-datasheet.pdf)