# TXM30M0004252LBCEO00T

**Yajingxin** · Crystals · SMD2520-4P

TXM30M0004252LBCEO00T from Yajingxin, 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 connected to the resonator in the top-view drawing, for a 30.000000 MHz fundamental-mode crystal with 20 pF load capacitance. |
| 2 | NC | unconnected | Pad not wired to the resonator in the top-view drawing, and the datasheet states no function for it. |
| 3 | XTAL2 | passive | Crystal terminal connected to the resonator in the top-view drawing, for a 30.000000 MHz fundamental-mode crystal with 20 pF load capacitance. |
| 4 | NC | unconnected | Pad not wired to the resonator in the top-view drawing, and the datasheet states no function for it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yajingxin |
| 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 at 25℃ |  | -10 |  | 10 | ppm | at 25℃ | 2 |
| Stability over operation temperature |  | -30 |  | 30 | ppm | over operating temperature range | 2 |
| Aging |  | -5 |  | 5 | ppm/year |  | 2 |
| Shunt Capacitance (Co) | Co | 0 |  | 5 | pF |  | 2 |
| Operating Temperature Range |  | -40 |  | 85 | ℃ |  | 2 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 2 |
| Average Ramp-up Rate (Ts max to Tp) |  |  |  | 3 | ℃/second | Pb-free assembly reflow profile | 3 |
| Ramp-down rate |  |  |  | 6 | ℃/second | reflow profile | 3 |
| Time 25℃ to Peak Temperature |  |  |  | 8 | minutes | reflow profile | 3 |
| Peak/Classification Temperature (Tp) | Tp |  |  | 260 | ℃ | reflow profile | 3 |
| Suggested reflow times |  |  |  | 3 | Times | reflow | 3 |
| Total time |  |  |  | 200 | sec | reflow profile | 3 |
| Equivalent Resistance (ESR) |  |  | 35 |  | Ω |  | 2 |
| Insulation Resistance |  |  | 500 |  | MΩ | at DC 100V | 2 |
| Load Capacitance (CL) | CL |  | 20 |  | pF |  | 2 |
| Frequency (nominal) |  |  | 30 |  | MHZ |  | 2 |

## CAD (KiCad official)

- Symbol: `TXM30M0004252LBCEO00T`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `txm30m0004252lbceo00t-etched.step` / `txm30m0004252lbceo00t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `txm30m0004252lbceo00t.step` / `txm30m0004252lbceo00t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yajingxin datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586197943774404608) (4 pp, sha256 `ff79cd1fa5cb8471`, retrieved 2026-10-15, 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/txm30m0004252lbceo00t-datasheet.pdf)