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STWD100YNYWY3F

Public Made by Adom

by adom

STMicroelectronics Supervisor and Reset ICs, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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STWD100YNYWY3F

STMicroelectronics · Supervisor and Reset ICs · SOT-23-5

STWD100YNYWY3F from STMicroelectronics, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 WDO output Active-low watchdog output (overlined WDO). Open-drain on 'N' variants (STWD100YNYWY3F) requiring an external pull-up to VCC or up to 6 V; asserted low when the watchdog times out. A 10 kΩ pull-up is sufficient for most applications.
2 GND power_in Device ground reference (0 V).
3 EN input Active-low chip enable (overlined EN). Internal pull-down keeps the device enabled when left floating. Driving EN high disables the watchdog and resets the timer; a positive pulse >1 μs resets the watchdog. Glitches shorter than 100 ns are ignored.
4 WDI input Watchdog input. Must be toggled within the watchdog timeout period tWD to clear the internal watchdog timer, otherwise WDO is asserted. On the 'Y' device version (tWD = 1.6 s), the timer is cleared on both rising and falling edges of WDI. Pulses ≥1 μs are detected; glitches <100 ns are ignored.
5 VCC power_in Positive supply voltage input. Watchdog timer starts counting once VCC exceeds the startup voltage VSTART (~2.2 V). Typical current consumption 13 μA.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • STWD100YNYWY3FNWWY3F
  • STWD100YNYWY3FYNWWY3F
  • STWD100YNYWY3F
  • STWD100YNYWY3FNPWY3F
  • STWD100YNYWY3FYNPWY3F
  • STWD100YNYWY3FNXWY3F
  • STWD100YNYWY3FYNXWY3F
  • STWD100YNYWY3FPYW83F

CAD (KiCad official)

  • Symbol: STWD100YNYWY3F
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: stwd100ynywy3f-etched.step / stwd100ynywy3f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stwd100ynywy3f.step / stwd100ynywy3f.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
stwd100ynywy3f.step 85 KB You want the bare part, or you mark your own boards.
stwd100ynywy3f-etched.step 2.1 MB You want the part with STWD100YNYWY3F already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 538 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (20 pp, sha256 2ec54876f17739de, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF