# TAXM8M4RDBCCT2T

**Yajingxin** · Crystals · SMD3225-4P

TAXM8M4RDBCCT2T 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 (chamfered pad-1 corner) for the 8.000000 MHz fundamental-mode resonator, 10 pF load capacitance ±10%, drive level 10 uW. |
| 2 | GND | power_in | Ground connection (marked GND in the connection diagram), typically tied to the lid/case. |
| 3 | XTAL2 | passive | Second crystal terminal, diagonal to pin 1, of the 8.000000 MHz resonator with max equivalent resistance 250 Ω. |
| 4 | GND | power_in | Ground connection (marked GND in the connection diagram), typically tied to the lid/case. |

## 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℃ (调整频差) |  | -10 |  | 10 | ppm | at 25℃ | 1 |
| Stability over operation temperature (温度频差) |  | -15 |  | 15 | ppm |  | 1 |
| Aging (老化率) |  | -5 |  | 5 | ppm/year |  | 1 |
| Operating Temperature Range (工作温度范围) |  | -40 |  | 85 | ℃ |  | 1 |
| Storage Temperature Range (储存温度范围) |  | -40 |  | 125 | ℃ |  | 1 |
| Shunt Capacitance (Co) (静态电容) | Co | 0 |  | 7 | pF |  | 1 |
| Insulation Resistance (绝缘电阻) |  | 500 |  |  | MΩ | at DC 100V | 1 |
| Equivalent Resistance (谐振电阻) |  |  |  | 250 | Ω |  | 1 |
| Drive Level (激励功率) |  |  |  | 10 | uw |  | 1 |
| Load Capacitance (CL) tolerance (负载电容) |  | -10 |  | 10 | % |  | 1 |
| Frequency (标称频率) |  |  | 8 |  | MHZ |  | 1 |
| Load Capacitance (CL) (负载电容) | CL |  | 10 |  | pF |  | 1 |

## CAD (KiCad official)

- Symbol: `TAXM8M4RDBCCT2T`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `taxm8m4rdbcct2t-etched.step` / `taxm8m4rdbcct2t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `taxm8m4rdbcct2t.step` / `taxm8m4rdbcct2t.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/8588884388134195200) (1 pp, sha256 `4801ca5b00287fb0`, 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:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/taxm8m4rdbcct2t-datasheet.pdf)