STWD100NYWY3F
Public Made by Adomby adom
STWD100NYWY3F with source-traceable pin map and explicitly nominal drawing-led CAD.
3D Model
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Symbol & Footprint
Schematic Symbol
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markdownSTWD100NYWY3F
STMicroelectronics · 5-pin SOT-23.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | WDO | output | Active-low watchdog output. Asserted low when the internal watchdog timer expires without being cleared. Available as open-drain (requires external pull-up, e.g. 10 kΩ to a supply up to 6 V) or push-pull depending on device suffix. |
| 2 | GND | power_in | Device ground reference. |
| 3 | EN | input | Active-low chip enable input. When low the watchdog is enabled; when high the watchdog is disabled. Has an internal pull-down to GND, so the device is enabled if EN is left floating. Pulses ≥1 µs are detected; 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 timer, otherwise WDO is asserted. Low-to-high transitions reset the timer on all versions; high-to-low transitions also reset it on STWD100xW/xX/xY. Pulses ≥1 µs are detected; glitches shorter than 100 ns are ignored. |
| 5 | VCC | power_in | Supply voltage input. Watchdog timer starts running once VCC rises above the startup voltage VSTART (~2.2 V). Typical operating current 13 µA. |
Model correction and provenance
Original Adom nominal model from the manufacturer package dimensions: 2.9 ×1.6 mm body,2.8 mm lead span,0.95 mm pitch and1.20 mm height. The previous generic1.55 mm model exceeded ST's1.45 mm maximum. This is drawing-led CAD, not a manufacturer STEP or a tolerance envelope. Mold taper, lead bends and materials are illustrative.
The marked variant adds a0.005 mm virtual full-MPN identification layer. It does not reproduce factory markings or physical etching. Board-use models omit the hero's nonphysical footprint/signal annotations.
The existing KiCad-derived symbol and footprint retain the library license exception. The footprint remains a generic variant; manufacturer land recommendations and process qualification require separate review.
See provenance, reference PDF, and manufacturer source. Reference review: DocID014134 Rev8, Table6, page19.
Local model review, native file validation, published wiki visual review and physical qualification are distinct.