# TPS3813I50QDBVRQ1

**Texas Instruments** · Monitors & Reset Circuits · SOT-23-6

TPS3813I50QDBVRQ1 from Texas Instruments, in a SOT-23-6. 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 | WDI | input | Watchdog timer input that must be driven at all times and not left floating. |
| 2 | GND | power_in | Ground. |
| 3 | WDT | input | Programmable watchdog delay input, set by connecting to GND or VDD or by using an external capacitor. |
| 4 | VDD | power_in | Supply voltage and supervising input, recommended operating range 2 V to 6 V (absolute maximum 7 V). |
| 5 | WDR | input | Selectable watchdog window ratio input that must be tied to VDD or GND and not left floating. |
| 6 | RESET | output | Open-drain active-low reset output, asserted when VDD drops below VIT. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Power Supply Chip |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TPS3813I50QDBVRQ1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `tps3813i50qdbvrq1-etched.step` / `tps3813i50qdbvrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps3813i50qdbvrq1.step` / `tps3813i50qdbvrq1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tps3813-q1) (25 pp, sha256 `358958089274ca7a`, retrieved 2026-10-22, 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-sonnet-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/tps3813i50qdbvrq1-datasheet.pdf)