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MAX809T

Public Unreviewed

by Ray

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

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Contents

README

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MAX809T

UMW · Supervisor and Reset ICs · SOT-23

MAX809T from UMW, in a SOT-23. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground pin. Common return for VDD supply and the RESET output.
2 RESET output Active-low reset output. Drives low when VDD is below the reset threshold voltage (3.08 V typ for the T-type), and returns high after at least 140 ms (150 ms min, 240 ms typ) delay once VDD rises above VRST. Maximum output current 20 mA; typically pulled up externally through a resistor.
3 VDD power_in Chip power supply and monitored voltage input. Operating range 1.0 V to 5.5 V; typical IDD 10 µA at 3.0 V. Also the supply sensed against the internal voltage reference for reset generation.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • MAX809TT
  • MAX809TS
  • MAX809TR

CAD (KiCad official)

  • Symbol: MAX809T
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
max809t.step 59 KB You want the bare part, or you mark your own boards.
max809t-etched.step 1.4 MB You want the part with MAX809T already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 337 faces against 69 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: UMW datasheet (12 pp, sha256 0fbe59798e7e2e41, 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