# HAL2502SW

**Hallwee** · Linear Hall Sensors · DFN-4(1x1)

HAL2502SW from Hallwee, in a DFN-4(1x1). 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 | OUT_S | output | CMOS push-pull output that goes low when the applied S-pole field exceeds Bop and returns high below Brp; absolute max output current is 5 mA. |
| 2 | VDD | power_in | Supply voltage pin, operating range 1.6 V to 5.5 V (absolute maximum 6 V, reverse 0.3 V), with a 1 uF bypass capacitor recommended. |
| 3 | OUT_N | output | CMOS push-pull output that goes low when the applied N-pole field exceeds Bop and returns high below Brp; absolute max output current is 5 mA. |
| 4 | GND | power_in | Ground pin. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hallwee |
| Package | DFN-4(1x1) |
| Category | Magnetic Sensors |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `HAL2502SW`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN-4(1x1) (KiCad packages3D, STEP)
- 3D model files: `hal2502sw-etched.step` / `hal2502sw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hal2502sw.step` / `hal2502sw.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/8603011871725539328) (5 pp, sha256 `484ceb1f02091b61`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/hal2502sw-datasheet.pdf)