# 7B027000Q01

**HD** · Crystals · SMD3225-4P

7B027000Q01 from HD, 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 | CRYSTAL | passive | Crystal terminal for the 27MHz fundamental-mode resonator (18pF load capacitance, 100μW max drive level), interchangeable with pin 3. |
| 2 | GND | power_in | Ground pad, connected to the package lid/ground per the internal view connection. |
| 3 | CRYSTAL | passive | Second crystal terminal for the 27MHz fundamental-mode resonator (25 ohms max resonance resistance), interchangeable with pin 1. |
| 4 | GND | power_in | Ground pad, connected to the package lid/ground per the internal view connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HD |
| 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 |
|---|---|---|---|---|---|---|---|
| Insulation Resistance | IR | 500 |  |  | M ohms |  | 1 |
| Drive Level | DL |  |  | 100 | μW |  | 1 |
| Shunt Capacitance | C0 |  |  | 2 | pF |  | 1 |
| Resonance Resistance |  |  |  | 25 | ohms |  | 1 |
| Frequency Tolerance | Δf/f | -10 |  | 10 | ppm |  | 1 |
| Frequency Temperature Stability |  | -20 |  | 20 | ppm |  | 1 |
| Aging | Δf_A | -3 |  | 3 | ppm/Year |  | 1 |
| Operating Temperature Range | TOPR | -20 |  | 70 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 125 | °C |  | 1 |
| Nominal Frequency | f |  | 27 |  | MHz |  | 1 |
| Load Capacitance | CL |  | 18 |  | pF |  | 1 |

## CAD (KiCad official)

- Symbol: `7B027000Q01`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `7b027000q01-etched.step` / `7b027000q01-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7b027000q01.step` / `7b027000q01.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/8588932692868415488) (4 pp, sha256 `5ddebf1a65fbb063`, retrieved 2026-10-21, 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/7b027000q01-datasheet.pdf)