# HAL2471SO

**Hallwee** · Hall Switches · SOT-23-3L

HAL2471SO from Hallwee, in a SOT-23-3L. 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 | VDD | power_in | Supply voltage pin; the datasheet gives a working supply range of 2.5 to 5.5 V (3 V typical) and an absolute maximum supply voltage of 7 V. |
| 2 | GND | power_in | Ground pin for the device supply and output reference. |
| 3 | OUT | output | Push-pull output pin that is latched low when the south or north pole field exceeds BOP and high when no field is present (BRP), with its absolute maximum output limits given in the ratings table. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hallwee |
| Package | SOT-23-3L |
| Category | Magnetic Sensors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating voltage | VDD | 2.5 | 3 | 5.5 | V |  | 2 |
| Supply current, average, operating | IDD |  | 40 |  | uA | 工作时 平均值; TA＝25℃，VDD＝2.75V | 2 |
| Output current | IOUT |  | 1 |  | mA | 工作时 | 2 |
| Saturation voltage | VSAT |  | 0.4 |  | V | IOUT＝1mA | 2 |
| Awake mode time | TAW |  | 50 |  | uS | 工作时 | 2 |
| Sleep mode time | TSL |  | 2 |  | mS | 工作时 | 2 |
| Operating point | BOP | 30 |  | 45 | GS | TA＝25℃，VDD＝2.75V | 3 |
| Release point | BRP | 5 |  | 18 | GS | TA＝25℃，VDD＝2.75V | 3 |
| Hysteresis | BHYS |  | 12 |  | GS | TA＝25℃，VDD＝2.75V | 3 |
| Power supply voltage (operating) | VDD |  |  | 7 | V |  | 2 |
| Supply current | IDD |  |  | 7 | mA |  | 2 |
| Output voltage | VOUT |  |  | 5 | V |  | 2 |
| Output current | IOUT |  |  | 10 | mA |  | 2 |
| Operating temperature range | TA | -40 |  | 85 | ℃ |  | 2 |
| Storage temperature range | TS | -50 |  | 150 | ℃ |  | 2 |
| Electrostatic discharge voltage | VESD |  |  | 4 | KV |  | 2 |

## CAD (KiCad official)

- Symbol: `HAL2471SO`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `hal2471so-etched.step` / `hal2471so-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hal2471so.step` / `hal2471so.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hallwee datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603111142881439744) (4 pp, sha256 `8f4c71825ad5d332`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/hal2471so-datasheet.pdf)