# XC21M4-24.000-F12NNHQ

**HCI** · Crystals · SMD2016-4P

XC21M4-24.000-F12NNHQ from HCI, in a SMD2016-4P. 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 | CRYSTAL | passive | Crystal terminal; one of the two resonator connections (pads 1 and 3). |
| 2 | NC/GND | passive | N.C. or GND; connected to the metal lid, may be left open (floating) or connected to ground. |
| 3 | CRYSTAL | passive | Crystal terminal; the other resonator connection (pads 1 and 3). |
| 4 | NC/GND | passive | N.C. or GND; connected to the metal lid, may be left open (floating) or connected to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HCI |
| Package | SMD2016-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Equivalent series resistance |  |  |  | 100 | Ω | 24.000 to 29.999MHz | 1 |
| Shunt capacitance |  |  |  | 3 | pF |  | 1 |
| Drive level |  |  | 10 | 100 | µW |  | 1 |
| Storage temperature range |  | -55 |  | 125 | °C |  | 1 |
| Nominal frequency |  |  | 24 |  | MHz |  | 1 |

## CAD (KiCad official)

- Symbol: `XC21M4-24.000-F12NNHQ`
- Footprint: `Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm`
- 3D model: SMD2016-4P (KiCad packages3D, STEP)
- 3D model files: `xc21m4-24-000-f12nnhq-etched.step` / `xc21m4-24-000-f12nnhq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xc21m4-24-000-f12nnhq.step` / `xc21m4-24-000-f12nnhq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HCI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590196225246474240) (1 pp, sha256 `e89f0768f67c7eed`, retrieved 2026-10-14, 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/xc21m4-24-000-f12nnhq-datasheet.pdf)