# Q22FA23V0028500

**Seiko Epson** · Crystals · SMD3225-4P

Q22FA23V0028500 from Seiko Epson, 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 | X1 | passive | Crystal terminal 1 of the FA-238V 3.2 x 2.5 mm unit, connected internally to the crystal element (TOP VIEW internal connection). |
| 2 | GND_CASE | power_in | Connected internally to the metal lid/case; the datasheet says to connect it to ground. |
| 3 | X2 | passive | Crystal terminal 2 of the FA-238V 3.2 x 2.5 mm unit, connected internally to the crystal element (TOP VIEW internal connection). |
| 4 | GND_CASE | power_in | Connected internally to the metal lid/case; the datasheet says to connect it to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Seiko Epson |
| 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 |
|---|---|---|---|---|---|---|---|
| ESR, FA-238V, 12.0 MHz ≤ f_nom ≤ 13.0 MHz | R1 |  |  | 100 | Ω | -40 °C ~ +85 °C, DL = 100 µW; f_nom 12.0 MHz ≤ f_nom ≤ 13.0 MHz | 1 |
| ESR, FA-238V, 13.0 MHz < f_nom < 20.0 MHz | R1 |  |  | 80 | Ω | -40 °C ~ +85 °C, DL = 100 µW; 13.0 MHz < f_nom < 20.0 MHz | 1 |
| ESR, FA-238V, 20.0 MHz ≤ f_nom < 25.0 MHz | R1 |  |  | 60 | Ω | -40 °C ~ +85 °C, DL = 100 µW; 20.0 MHz ≤ f_nom < 25.0 MHz | 1 |
| ESR, FA-238V, 25.0 MHz ≤ f_nom < 30.0 MHz | R1 |  |  | 50 | Ω | -40 °C ~ +85 °C, DL = 100 µW; 25.0 MHz ≤ f_nom < 30.0 MHz | 1 |
| ESR, FA-238V, 30.0 MHz ≤ f_nom ≤ 60.0 MHz | R1 |  |  | 40 | Ω | -40 °C ~ +85 °C, DL = 100 µW; 30.0 MHz ≤ f_nom ≤ 60.0 MHz | 1 |
| Frequency tolerance (standard grade) | f_tol | -50 |  | 50 | × 10-6 | Standard; options ±15 × 10-6 to ±50 × 10-6 per part-number table; +25 °C | 1 |
| Frequency temperature characteristic | f_tem | -30 |  | 30 | × 10-6 | -20 °C ~ +70 °C | 1 |
| Frequency temperature characteristic (option) | f_tem | -10 |  | 10 | × 10-6 | -20 °C ~ +75 °C | 1 |
| Frequency aging | f_age | -5 |  | 5 | × 10-6 / year | +25 °C, first year (printed standard limit ±5 × 10-6/year Max.) | 1 |
| Frequency aging (option) | f_age | -1 |  | 1 | × 10-6 / year | +25 °C, first year | 1 |
| Load capacitance | CL | 7 |  |  | pF | Printed range 7 pF ~ ∞; upper bound not a finite number | 1 |
| Drive level | DL |  |  | 200 | µW | Operating drive level range 1 µW ~ 100 µW | 1 |
| Operating temperature range | T_use | -40 |  | 85 | °C | Printed as -40 °C ~ +85 °C (+105 °C); above +85 °C the datasheet says to contact Seiko Epson | 1 |
| Storage temperature range | T_stg | -40 |  | 125 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `Q22FA23V0028500`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `q22fa23v0028500-etched.step` / `q22fa23v0028500-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `q22fa23v0028500.step` / `q22fa23v0028500.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Seiko Epson datasheet](docs/q22fa23v0028500-datasheet.pdf) (2 pp, sha256 `4e9c0baa33e30d2d`, 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/q22fa23v0028500-datasheet.pdf)