# RL120001621

**TROQ** · Crystals · SMD3225-4P

RL120001621 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 1 on the 3.2x2.5x0.7mm 4-pad package, used for the 8.000MHz to 54.000MHz fundamental-mode crystal. |
| 2 | NC/GND | passive | Pad 2 is shown in the package drawing, but the datasheet does not state its function, so it is likely a case or ground pad. |
| 3 | XTAL2 | passive | Crystal terminal 2 on the 4-pad package, used for the 8.000MHz to 54.000MHz fundamental-mode crystal. |
| 4 | NC/GND | passive | Pad 4 is shown in the package drawing, but the datasheet does not state its function, so it is likely a case or ground pad. |

## 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 Range |  | 8 |  | 54 | MHz | Mode FUND | 1 |
| Frequency Deviation |  | -30 |  | 30 | ppm | Series range ±10ppm ~ ±30ppm; variant not decodable | 1 |
| Frequency Temperature Characteristics |  | -30 |  | 30 | ppm | Series range ±10ppm ~ ±30ppm; variant not decodable | 1 |
| Operating Temperature Range |  | -40 |  | 85 | ℃ | or specify | 1 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 1 |
| Aging Rate |  | -3 |  | 3 | ppm/year |  | 1 |
| Static Capacitance | C0 |  |  | 3 | pF | <3pF | 1 |
| Resonance Resistance 8.0-10.0MHz | ESR |  |  | 250 | Ω | 8.0MHz ~ 10.0MHz | 1 |
| Resonance Resistance 10.0-20.0MHz | ESR |  |  | 80 | Ω | 10.0MHz ~ 20.0MHz | 1 |
| Resonance Resistance 20.0-30.0MHz | ESR |  |  | 40 | Ω | 20.0MHz ~ 30.0MHz | 1 |
| Resonance Resistance 30.0-54.0MHz | ESR |  |  | 30 | Ω | 30.0MHz ~ 54.0MHz | 1 |

## CAD (KiCad official)

- Symbol: `RL120001621`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `rl120001621-etched.step` / `rl120001621-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl120001621.step` / `rl120001621.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TROQ datasheet](docs/rl120001621-datasheet.pdf) (1 pp, sha256 `3b3e42fd416960e4`, retrieved 2026-10-22, 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/rl120001621-datasheet.pdf)