# RL271381998

**TROQ** · Crystals · SMD3225-4P

RL271381998 from TROQ, 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 connected to one side of the resonator (diagonal to pin 3 in the connection diagram); 27.138270 MHz fundamental, CL 15 pF. |
| 2 | GND | power_in | Marked GND in the connection diagram; connected to ground (lid/case ground). |
| 3 | XTAL2 | passive | Crystal terminal connected to the other side of the resonator (diagonal to pin 1 in the connection diagram); 27.138270 MHz fundamental, CL 15 pF. |
| 4 | GND | power_in | Marked GND in the connection diagram; connected to ground (lid/case ground). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TROQ |
| 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℃ |  | -10 |  | 10 | ppm | at 25℃ | 2 |
| Stability over operation Temperature |  | -10 |  | 10 | ppm | over operating temperature | 2 |
| Aging |  | -3 |  | 3 | ppm/year |  | 2 |
| Shunt Capacitance | Co | 0 |  | 5 | pF |  | 2 |
| Equivalent Resistance |  |  |  | 30 | Ω |  | 2 |
| Insulation Resistance |  | 500 |  |  | MΩ | at DC 100V | 2 |
| Drive Level |  |  |  | 100 | uw |  | 2 |
| Operating Temperature Range |  | -20 |  | 70 | ℃ |  | 2 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 2 |
| Frequency |  |  | 27.1383 |  | MHZ | Fundamental mode | 2 |
| Load Capacitance | CL |  | 15 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `RL271381998`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `rl271381998-etched.step` / `rl271381998-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl271381998.step` / `rl271381998.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TROQ datasheet](docs/rl271381998-datasheet.pdf) (6 pp, sha256 `20218bfc596ada2a`, 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/rl271381998-datasheet.pdf)