# TS831-4IZT

**STMicroelectronics** · Supervisor And Reset ICs · TO-92-3

TS831-4IZT from STMicroelectronics, in a TO-92-3. 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 | output | Open drain reset output, active (low) when the input voltage is below the threshold, with a maximum sink current of 20mA for TS831-4 and a clamp diode to VCC (pin 2) rated at 100mA forward current. |
| 2 | IN | power_in | Input and supply voltage (VCC) monitored against the 4.50V typ. threshold of the TS831-4, operating range 1 to 5.5V and absolute maximum 7V. |
| 3 | GND | power_in | Ground, the reference terminal for all voltages. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-92-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TS831-4IZT`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files: `ts831-4izt-etched.step` / `ts831-4izt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ts831-4izt.step` / `ts831-4izt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ts831-4izt.pdf) (11 pp, sha256 `a9b2dcc0eb416e7e`, retrieved 2026-11-05, tier: manufacturer)
- **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/ts831-4izt-datasheet.pdf)