# UCC2946TPWRQ1

**Texas Instruments** · Supervisor And Reset ICs · TSSOP-8

UCC2946TPWRQ1 from Texas Instruments, in a TSSOP-8. 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 for the device. |
| 2 | RTH | input | Input that compares its voltage to an internal 1.25-V reference for programming the reset threshold using external resistors. |
| 3 | RES | output | Output that is high only if the voltage on RTH has risen above 1.235 V and remains low for the reset period. |
| 4 | RP | input | Input pin that allows the user to program the reset period by adjusting an external capacitor. |
| 5 | WDO | output | Output that is asserted low if the WDI pin is not toggled or strobed within the watchdog period. |
| 6 | WP | input | Input pin that allows the user to program the watchdog period by adjusting an external capacitor. |
| 7 | WDI | input | Input to the watchdog timer that must be toggled within the watchdog period to prevent WDO assertion. |
| 8 | VDD | power_in | Supply voltage input for the device, operating range 2.1 V to 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `UCC2946TPWRQ1`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ucc2946tpwrq1-etched.step` / `ucc2946tpwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2946tpwrq1.step` / `ucc2946tpwrq1.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/ucc2946-q1) (17 pp, sha256 `4134bf000832bbdb`, retrieved 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/ucc2946tpwrq1-datasheet.pdf)