# MAX809S-HXY

**HXY MOSFET** · Monitors & Reset Circuits · SOT-23

MAX809S-HXY from HXY MOSFET, in a SOT-23. 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 | GND | power_in | Ground reference pin of the supervisor. |
| 2 | VIN | power_in | Input voltage pin (VCC) with an operating input range of 1.2 V to 7.5 V, and an absolute maximum of 8.0 V. |
| 3 | Reset | output | Reset output pin that asserts when the monitored input voltage falls below the selected reset threshold, with a reset active timeout period of 100 ms to 300 ms. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOT-23 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Reset Active Timeout Period |  | 100 | 200 | 300 | ms |  | 3 |
| Input Voltage (VCC) Range | VCC | 1.2 |  | 7.5 | V | 25℃ | 3 |
| Supply Current | ISS | 1 | 1.8 | 2.5 | μA | VIN=6V，Vdet=2.63V | 3 |
| Reset Threshold Stability |  |  | 30 |  | Ppm/℃ |  | 3 |
| VCC to Reset Delay |  |  | 20 |  | us | VCC= VTH to VTH -100mV | 3 |
| Input Voltage |  | -0.3 |  | 8 | V |  | 2 |
| Operating Temperature |  | -30 |  | 80 | ℃ |  | 2 |
| Storage Temperature |  | -40 |  | 125 | ℃ |  | 2 |
| Thermal Resistance (Junction to Ambient) | θJA |  |  | 250 | ℃/W | Assume no ambient airflow, no heat sink | 2 |
| Power Dissipation | PD |  |  | 0.2 | W | Ta= 25℃ | 2 |

## CAD (KiCad official)

- Symbol: `MAX809S-HXY`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `max809s-hxy-etched.step` / `max809s-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max809s-hxy.step` / `max809s-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](docs/max809s-hxy-datasheet.pdf) (5 pp, sha256 `c8eb339290b56a27`, retrieved 2026-10-27, tier: lcsc)
- **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/max809s-hxy-datasheet.pdf)