# CAT823STDI-GT3

**onsemi** · Monitors & Reset Circuits · TSOT-23-5

CAT823STDI-GT3 from onsemi, in a TSOT-23-5. 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 | RESET | output | CMOS push-pull active-low reset output, held active for a 140 ms minimum timeout (tRP) after VCC rises above the reset threshold, with a 20 mA absolute maximum output current. |
| 2 | GND | power_in | Ground reference for the device. |
| 3 | MR | input | Active-low manual reset input with an internal 52 kΩ pull-up to VCC, driven low by a pushbutton, open-drain output or CMOS output, with VIL max 0.3 x VCC and VIH min 0.7 x VCC. |
| 4 | WDI | input | Watchdog timer input that must toggle within the 1.12 s minimum timeout period to avoid a reset, and can be disabled by tri-stating or leaving it open. |
| 5 | VCC | power_in | Power supply input, recommended 1.2 to 5.5 V over -40 to +85 °C, with a 6 V absolute maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `CAT823STDI-GT3`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`
- 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `cat823stdi-gt3-etched.step` / `cat823stdi-gt3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cat823stdi-gt3.step` / `cat823stdi-gt3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/cat823stdi-gt3-d.pdf) (11 pp, sha256 `c3276e3d139e9445`, retrieved 2026-10-27, 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/cat823stdi-gt3-datasheet.pdf)