# CXAF-020000-3-AL-16

**AKER** · Crystals · SMD3225-4P

CXAF-020000-3-AL-16 from AKER, 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 for the 20.000000 MHz fundamental AT-cut resonator (12 pF load capacitance, 100 Ω max ESR); the drawing marks #1 without a function label. |
| 2 | GND | power_in | Pad #2 is labelled GND on the package drawing and is typically tied to ground. |
| 3 | XTAL2 | passive | Second crystal terminal for the 20.000000 MHz resonator; the drawing marks #3 without a function label. |
| 4 | GND | power_in | Pad #4 is labelled GND on the package drawing and is typically tied to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | AKER |
| 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 |  | -15 |  | 15 | ppm | at 25℃ ± 3℃ | 3 |
| Frequency Stability |  | -50 |  | 50 | ppm | Operating Temp (Refer 25℃) | 3 |
| Aging |  | -3 |  | 3 | ppm | First Year at 25℃ | 3 |
| Equivalent Series Resistance | ESR |  |  | 100 | Ω |  | 3 |
| Shunt Capacitance | C0 |  |  | 3 | pF |  | 3 |
| Drive Level | DL |  | 10 | 200 | uW |  | 3 |
| Operating Temperature |  | -40 |  | 125 | ℃ |  | 3 |
| Storage Temperature Range |  | -55 |  | 150 | ℃ |  | 3 |
| Nominal Frequency |  |  | 20 |  | MHz |  | 3 |
| Load Capacitance | CL |  | 12 |  | pF |  | 3 |

## CAD (KiCad official)

- Symbol: `CXAF-020000-3-AL-16`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `cxaf-020000-3-al-16-etched.step` / `cxaf-020000-3-al-16-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cxaf-020000-3-al-16.step` / `cxaf-020000-3-al-16.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [AKER datasheet](docs/cxaf-020000-3-al-16-datasheet.pdf) (9 pp, sha256 `fac9302cbad19e4b`, retrieved 2026-10-23, 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/cxaf-020000-3-al-16-datasheet.pdf)