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STM811LW16F

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STMicroelectronics Monitors & Reset Circuits, SOT-143-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower supply chipstm811lw16f
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Contents

README

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STM811LW16F

STMicroelectronics · Monitors & Reset Circuits · SOT-143-4

STM811LW16F from STMicroelectronics, in a SOT-143-4. 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 VSS power_in Ground reference (0 V). Connect to system ground close to the device.
2 RST output Active-low push-pull reset output. Asserted (driven low) whenever VCC falls below the reset threshold (VRST) or when MR is pulled low; remains asserted for at least trec (140 ms min) after VCC returns above threshold. Guaranteed valid down to VCC = 1.0 V; both sources and sinks current. Open circuit for VCC < 1 V - add a 100 kOhm pull-down if a valid low is required down to 0 V.
3 MR input Active-low manual (push-button) reset input. A logic low on MR asserts RST; RST remains asserted while MR is low and for trec after MR returns high. MR has an internal 20 kOhm pull-up to VCC, so it can be left open when unused. Compatible with TTL/CMOS logic levels or open-drain/open-collector drivers; add an optional 0.1 uF cap to GND for extra noise immunity in noisy environments.
4 VCC power_in Supply voltage input, monitored by the internal reset comparator against VRST. Typical supply current ~6 uA. Bypass with a 0.1 uF ceramic capacitor mounted as close as possible to the pin for transient immunity.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-143-4
Category Power Supply Chip
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • STM811LW16F
  • STM811MW16F
  • STM811TW16F
  • STM811SW16F
  • STM811RW16F
  • STM812LW16F
  • STM812MW16F
  • STM812TW16F
  • STM812SW16F
  • STM812RW16F
  • STM809LWX6F
  • STM809MWX6F
  • STM809TWX6F
  • STM809SWX6F
  • STM809RWX6F
  • STM810LWX6F
  • STM810MWX6F
  • STM810TWX6F
  • STM810SWX6F
  • STM810RWX6F

CAD (KiCad official)

  • Symbol: STM811LW16F
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143-4 (KiCad packages3D, STEP)
  • 3D model files: stm811lw16f-etched.step / stm811lw16f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm811lw16f.step / stm811lw16f.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (21 pp, sha256 24f3f88facdeb210, retrieved 2026-08-17, tier: lcsc)
  • 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