# 7C026000MW1

**HD** · Crystals · SMD2520-4P

7C026000MW1 from HD, in a SMD2520-4P. 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 connected to the quartz resonator element, 26.000MHz fundamental mode with 12pF load capacitance. |
| 2 | GND | power_in | Ground pad, connected to GND per the internal view connection. |
| 3 | CRYSTAL | passive | Second crystal terminal connected to the quartz resonator element, 26.000MHz fundamental mode with 12pF load capacitance. |
| 4 | GND | power_in | Ground pad, connected to GND per the internal view connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HD |
| Package | SMD2520-4P |
| 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 | Δf/f | -10 |  | 10 | ppm |  | 1 |
| Frequency temperature stability |  | -20 |  | 20 | ppm |  | 1 |
| Aging | Δf_A | -3 |  | 3 | ppm/Year |  | 1 |
| Nominal frequency | f |  | 26 |  | MHz |  | 1 |
| Load capacitance | CL |  | 12 |  | pF |  | 1 |
| Resonance resistance |  |  |  | 50 | ohms | Fundamental mode | 1 |
| Shunt capacitance | C0 |  |  | 2 | pF |  | 1 |
| Drive level | DL |  |  | 100 | μW |  | 1 |
| Insulation resistance | IR | 500 |  |  | M ohms |  | 1 |
| Operating temperature range | TOPR | -20 |  | 70 | °C |  | 1 |
| Storage temperature range | TSTG | -55 |  | 125 | °C |  | 1 |
| Frequency change after drop | Δf | -5 |  | 5 | ppm | Free drop from 75cm height, 3 times | 2 |
| Frequency change after mechanical shock | Δf | -5 |  | 5 | ppm | Half sine wave 1000g, three axes, 3 times each | 2 |
| Frequency change after shake | Δf | -5 |  | 5 | ppm | Shake 10~55Hz, swing 1.5mm, 30 minutes | 2 |
| Frequency change after humidity | Δf | -5 |  | 5 | ppm | +40±2℃ & 90%~95% R.H. 250 hours | 2 |
| Frequency change after low temperature | Δf | -5 |  | 5 | ppm | -40±2℃, 250 hours | 2 |
| Frequency change after high temperature | Δf | -5 |  | 5 | ppm | +85±2℃, 250 hours | 2 |
| Frequency change after temperature cycling | Δf | -5 |  | 5 | ppm | -30±3℃/30 min to +85±2℃/30 min, 5 cycles | 2 |
| Frequency change after reflow | Δf | -5 |  | 5 | ppm | Reflow examination | 2 |

## CAD (KiCad official)

- Symbol: `7C026000MW1`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `7c026000mw1-etched.step` / `7c026000mw1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7c026000mw1.step` / `7c026000mw1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HD datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588932579911614464) (4 pp, sha256 `d1ccd0cecb85ac4f`, retrieved 2026-10-16, 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/7c026000mw1-datasheet.pdf)