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STWD100NPWY3F
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STMicroelectronics Supervisor And Reset ICs, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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STWD100NPWY3F
STMicroelectronics · Supervisor And Reset ICs · SOT-23-5
STWD100NPWY3F from STMicroelectronics, 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 | WDO | output | Active-low watchdog output (open drain or push-pull depending on version) that is asserted when the watchdog timer expires without being cleared; an open-drain output needs an external pull-up to a supply up to 6 V (10 kΩ typical). |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable pin with an internal pull-down resistor (32 to 100 kΩ, 63 kΩ typ.), so the device is enabled when left floating; pulses of at least 1 µs are detected and glitches shorter than 100 ns are ignored. |
| 4 | WDI | input | Watchdog input that must be toggled within the watchdog timeout period tWD to clear the internal timer, otherwise WDO is asserted; pulses of at least 1 µs are detected and glitches under 100 ns are ignored. |
| 5 | VCC | power_in | Supply voltage, operating range 2.7 V to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
STWD100NPWY3F - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
stwd100npwy3f-etched.step/stwd100npwy3f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stwd100npwy3f.step/stwd100npwy3f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (20 pp, sha256
8959b4ce1feab38f, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-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).
# STWD100NPWY3F
**STMicroelectronics** · Supervisor And Reset ICs · SOT-23-5
STWD100NPWY3F from STMicroelectronics, 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 | WDO | output | Active-low watchdog output (open drain or push-pull depending on version) that is asserted when the watchdog timer expires without being cleared; an open-drain output needs an external pull-up to a supply up to 6 V (10 kΩ typical). |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable pin with an internal pull-down resistor (32 to 100 kΩ, 63 kΩ typ.), so the device is enabled when left floating; pulses of at least 1 µs are detected and glitches shorter than 100 ns are ignored. |
| 4 | WDI | input | Watchdog input that must be toggled within the watchdog timeout period tWD to clear the internal timer, otherwise WDO is asserted; pulses of at least 1 µs are detected and glitches under 100 ns are ignored. |
| 5 | VCC | power_in | Supply voltage, operating range 2.7 V to 5.5 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
## CAD (KiCad official)
- Symbol: `STWD100NPWY3F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `stwd100npwy3f-etched.step` / `stwd100npwy3f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stwd100npwy3f.step` / `stwd100npwy3f.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907587002126336) (20 pp, sha256 `8959b4ce1feab38f`, retrieved 2026-10-01, 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/stwd100npwy3f-datasheet.pdf)