# AH422SU

**Alfa(中科阿尔法)** · Hall Switches · SOT-23-3L

AH422SU from Alfa(中科阿尔法), 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 | VCC | power_in | Supply pin; the datasheet specifies an operating supply range of 3.5 V to 40 V, with an absolute maximum VCC of 60 V. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | VOUT | output | Open-collector digital output with a rated sink current ISINK of 30 mA, a saturation voltage VSAT of 0.4 V max at IOUT = 20 mA, and an absolute maximum VOUT of 60 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Alfa(中科阿尔法) |
| 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 |
|---|---|---|---|---|---|---|---|
| 电源电压 (Supply voltage) | VCC | -0.3 |  | 60 | V |  | 4 |
| 输出电压 (Output voltage) | VOUT | -0.5 |  | 60 | V |  | 4 |
| 输出电流 (Output current) | IOUT | 0 |  | 40 | mA |  | 4 |
| 工作温度 (Operating temperature, TJ) | TJ | -40 |  | 125 | ℃ |  | 4 |
| 存储温度 (Storage temperature) | TSTG | -50 |  | 165 | ℃ |  | 4 |
| 电源电压 (Supply voltage range) | VCC | 3.5 |  | 40 | V |  | 4 |
| 工作电流 (Operating current) | ICC |  | 6 | 9 | mA | VCC=5V | 4 |
| 输出漏电流 (Output leakage current) | Ile |  |  | 10 | uA |  | 4 |
| 输出电压 (Output saturation voltage) | VSAT |  |  | 0.4 | V | IOUT=20mA，导通状态 | 4 |
| 输出电流沉 (Output sink current) | ISINK | 30 |  |  | mA |  | 4 |
| 输出上升时间 (Output rise time) | TR |  |  | 1 | us | CL=20pF | 4 |
| 输出下降时间 (Output fall time) | TF |  |  | 1.5 | us | CL=20pF | 4 |
| 工作点 (Operate point) | Bop | 14 | 30 | 50 | Gs | RL=1kΩ ，CL=20pF | 4 |
| 释放点 (Release point) | Brp | 5 | 20 | 35 | Gs | RL=1kΩ ，CL=20pF | 4 |
| 回差 (Hysteresis) | BHYS | 6 | 10 | 20 | Gs | RL=1kΩ ，CL=20pF | 4 |

## CAD (KiCad official)

- Symbol: `AH422SU`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `ah422su-etched.step` / `ah422su-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ah422su.step` / `ah422su.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Alfa(中科阿尔法) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909137666584576) (8 pp, sha256 `2ec95d67bcd957b0`, 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/ah422su-datasheet.pdf)