# E2SB54E000009E

**Hosonic Elec** · Crystals · SMD2520-4P

E2SB54E000009E from Hosonic Elec, 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 | X1 | passive | Crystal terminal (#1, #3 are the X'tal connections), connected to one side of the quartz blank; nominal frequency 54.000000 MHz, load capacitance 19 pF. |
| 2 | GND | power_in | Ground connection (#2, #4 are GND), tied to the lid/case ground. |
| 3 | X2 | passive | Crystal terminal (#1, #3 are the X'tal connections), connected to the other side of the quartz blank; nominal frequency 54.000000 MHz, load capacitance 19 pF. |
| 4 | GND | power_in | Ground connection (#2, #4 are GND), tied to the lid/case ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hosonic Elec |
| Package | SMD2520-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency Tolerance | ΔF/F0 | -5 |  | 5 | ppm | At 25℃±3℃ | 3 |
| Frequency Stability | TC | -14 |  | 14 | ppm | Ref. to 25℃ | 3 |
| Operating Temperature Range | TOPR | -40 |  | 105 | ℃ |  | 3 |
| Storage Temperature | TSTG | -55 |  | 125 | ℃ |  | 3 |
| Equivalent Series Resistance | ESR |  |  | 100 | Ω |  | 3 |
| Drive Level | DL |  | 50 | 100 | μW |  | 3 |
| Insulation Resistance | IR | 500 |  |  | MΩ | At 100VDC | 3 |
| Shunt Capacitance | C0 |  |  | 3 | pF |  | 3 |
| Aging Per Year | Fa | -2 |  | 2 | ppm | First Year | 3 |
| Nominal Frequency | F0 |  | 54 |  | MHz |  | 3 |
| Load capacitance | CL |  | 19 |  | pF |  | 3 |

## CAD (KiCad official)

- Symbol: `E2SB54E000009E`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `e2sb54e000009e-etched.step` / `e2sb54e000009e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `e2sb54e000009e.step` / `e2sb54e000009e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hosonic Elec datasheet](docs/e2sb54e000009e-datasheet.pdf) (9 pp, sha256 `17d0867c171a3e23`, retrieved 2026-10-22, 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/e2sb54e000009e-datasheet.pdf)