# 7B027000R01

**HD** · Crystals · SMD3225-4P

7B027000R01 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 connected to one side of the 27MHz quartz resonator (pin 1 marked by the corner chamfer pad). |
| 2 | GND | power_in | Ground pad, connected to GND per the internal view connection (typically to the lid). |
| 3 | CRYSTAL | passive | Crystal terminal connected to the other side of the 27MHz quartz resonator. |
| 4 | GND | power_in | Ground pad, connected to GND per the internal view connection (typically to the lid). |

## 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 |
|---|---|---|---|---|---|---|---|
| Nominal frequency | f |  | 27 |  | MHz | Nominal frequency as printed (3.1) | 1 |
| Frequency tolerance | Δf/f | -10 |  | 10 | ppm | Printed as ±10ppm; test temperature not stated | 1 |
| Frequency temperature stability | Δf/f | -20 |  | 20 | ppm | Printed as ±20ppm; reference conditions not stated | 1 |
| Load capacitance | CL |  | 20 |  | pF | Nominal value as printed (3.2) | 1 |
| Resonance resistance | R1 |  |  | 25 | ohm | Max | 1 |
| Shunt capacitance | C0 |  |  | 2 | pF | Max | 1 |
| Drive level | DL |  |  | 100 | μW | Max | 1 |
| Aging | Δf/fA | -3 |  | 3 | ppm/Year | Printed as ±3ppm/Year Max | 1 |
| Insulation resistance | IR | 500 |  |  | M ohms | Printed as >500M ohms | 1 |
| Operating temperature range | TOPR | -20 |  | 70 | °C | Operating range as printed (3.9) | 1 |
| Storage temperature range | TSTG | -55 |  | 125 | °C | Storage range as printed (3.10); not labelled as absolute maximum | 1 |
| Drop characteristics frequency change | Δf | -5 |  | 5 | ppm | Free drop 75cm, 3 times on hard wooden board; Rr as specification | 2 |
| Mechanical shock frequency change | Δf | -5 |  | 5 | ppm | Half sine 1000g, 3 axes, 3 times each; Rr as specification | 2 |
| Shake frequency change | Δf | -5 |  | 5 | ppm | 10~55Hz, 1.5mm swing, x/y/z; Rr as specification | 2 |
| Humidity frequency change | Δf | -5 |  | 5 | ppm | +40±2℃ & 90%~95% R.H., 250 hours; Rr as specification | 2 |
| Low temperature frequency change | Δf | -5 |  | 5 | ppm | -40±2℃, 250 hours; Rr as specification | 2 |
| High temperature frequency change | Δf | -5 |  | 5 | ppm | +85±2℃, 250 hours; Rr as specification | 2 |
| Temperature cycling frequency change | Δf | -5 |  | 5 | ppm | -30±3℃/+85±2℃, 5 cycles; Rr as specification | 2 |
| Reflow frequency change | Δf | -5 |  | 5 | ppm | Reflow examination; Rr as specification | 2 |

## CAD (KiCad official)

- Symbol: `7B027000R01`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `7b027000r01-etched.step` / `7b027000r01-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7b027000r01.step` / `7b027000r01.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/8588931750189391872) (4 pp, sha256 `c247c074861f392c`, retrieved 2026-10-13, 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/7b027000r01-datasheet.pdf)