# TPAX823SS5

**TECH PUBLIC** · Supervisor And Reset ICs · SOT-23-5

TPAX823SS5 from TECH PUBLIC, in a SOT-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 | Active-low reset output that pulses low for 200ms when triggered and stays low whenever VCC is below the reset threshold or when MR is a logic low. |
| 2 | GND | power_in | Ground. |
| 3 | MR | input | Manual-reset input that triggers a reset pulse when pulled below 0.3VCC, has an internal 52kΩ pull-up resistor, and can be left open or connected to VCC if unused. |
| 4 | WDI | input | Watchdog input that triggers a reset if it stays high or low longer than the watchdog timeout period, and the watchdog is disabled if WDI is left unconnected or connected to a three-stated buffer output. |
| 5 | VCC | power_in | Supply voltage, with a wide operating range of 1V to 7V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TPAX823SS5`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tpax823ss5-etched.step` / `tpax823ss5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpax823ss5.step` / `tpax823ss5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tpax823ss5-datasheet.pdf) (7 pp, sha256 `0b3508230662a905`, retrieved 2026-10-27, 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/tpax823ss5-datasheet.pdf)