# ABLS-25.000MHZ-K4F-T

**Abracon LLC** · Crystals · HC-49S-SMD

ABLS-25.000MHZ-K4F-T from Abracon LLC, in a HC-49S-SMD. 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 | 1 | passive | Terminal 1 of a two-terminal crystal; either orientation. |
| 2 | 2 | passive | Terminal 2 of a two-terminal crystal; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Abracon LLC |
| Package | HC-49S-SMD |
| Category | Crystals, Oscillators, Resonators |
| Pins | 2 |

## 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°C |  | -30 |  | 30 | ppm | At +25°C; freq. tolerance code 4 = ±30 ppm | 1 |
| Frequency stability over operating temperature (ref. +25°C) |  | -50 |  | 50 | ppm | Ref. +25°C; standard ±50 ppm max (see options) | 1 |
| Aging at 25°C (first year) |  | -5 |  | 5 | ppm | At 25°C, first year | 1 |
| Equivalent series resistance (ESR) | ESR |  |  | 40 | Ω | 16.000 - 50.000 MHz (Fund.), Table 1 | 1 |
| Shunt capacitance | C0 |  |  | 7 | pF |  | 1 |
| Insulation resistance |  | 500 |  |  | MΩ | At 100Vdc ± 15V | 1 |
| Drive level |  |  |  | 1 | mW | Max | 1 |
| Spurious responses |  |  |  | -3 | dB |  | 1 |
| Operating temperature |  | -40 |  | 125 | °C | Option K: -40°C to +125°C | 1 |
| Storage temperature |  | -55 |  | 125 | °C |  | 1 |
| Drive level |  |  | 100 |  | μW | Typical | 1 |
| Load capacitance | CL |  | 18 |  | pF | Standard value, see options | 1 |
| Nominal frequency |  |  | 25 |  | MHz | MPN frequency 25.000 MHz | 1 |

## CAD (KiCad official)

- Symbol: `ABLS-25.000MHZ-K4F-T`
- Footprint: `Crystal:Crystal_SMD_HC49-SD`
- 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files: `abls-25-000mhz-k4f-t-etched.step` / `abls-25-000mhz-k4f-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `abls-25-000mhz-k4f-t.step` / `abls-25-000mhz-k4f-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Abracon LLC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589787709439827968) (2 pp, sha256 ``, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `crystal numbering` (convention), consensus `off` (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/abls-25-000mhz-k4f-t-datasheet.pdf)