# XC21M4-39.000-F10LLDTL

**HCI** · Crystals · SMD2016-4P

XC21M4-39.000-F10LLDTL 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 1 of the AT-cut fundamental crystal (20.000 to 60.000MHz range). |
| 2 | N.C./GND | passive | Connected to the metal lid; may be left open (floating) or connected to ground. |
| 3 | CRYSTAL | passive | Crystal terminal 2 of the AT-cut fundamental crystal (20.000 to 60.000MHz range). |
| 4 | N.C./GND | passive | Connected to the metal lid; may be left open (floating) or connected to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HCI |
| Package | SMD2016-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| 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 (30.000 to 39.999MHz) |  |  |  | 80 | Ω | 30.000 to 39.999MHz | 1 |
| Shunt capacitance |  |  |  | 3 | pF |  | 1 |
| Drive level |  |  | 10 | 100 | µW | TYP / MAX as printed | 1 |
| Storage temperature range |  | -55 |  | 125 | °C |  | 1 |
| Operating temperature range (option -20 to +70°C) |  | -20 |  | 70 | °C | Option listed as -20 to +70°C; Other options available | 1 |
| Operating temperature range (option -30 to +85°C) |  | -30 |  | 85 | °C | Option listed as -30 to +85°C; Other options available | 1 |
| Nominal frequency (from part number 39.000 MHz) |  |  | 39 |  | MHz | Nominal frequency range 20.000 ~ 60.000MHz; value from MPN | 1 |

## CAD (KiCad official)

- Symbol: `XC21M4-39.000-F10LLDTL`
- Footprint: `Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm`
- 3D model: SMD2016-4P (KiCad packages3D, STEP)
- 3D model files: `xc21m4-39-000-f10lldtl-etched.step` / `xc21m4-39-000-f10lldtl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xc21m4-39-000-f10lldtl.step` / `xc21m4-39-000-f10lldtl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HCI datasheet](docs/xc21m4-39-000-f10lldtl-datasheet.pdf) (1 pp, sha256 `e89f0768f67c7eed`, retrieved 2026-10-22, tier: lcsc)
- **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/xc21m4-39-000-f10lldtl-datasheet.pdf)