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MAX809R

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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MAX809R

UMW · Supervisor and Reset ICs · SOT-23

MAX809R 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. 0 V reference for VDD and the RESET output driver.
2 RESET output Active-low reset output. RESET is driven low when VDD is below the reset threshold voltage (typ. 2.63 V for MAX809R) and returns high after at least ~140-150 ms delay once VDD rises back above threshold. Maximum output current 20 mA; push-pull driver referenced to VDD.
3 VDD power_in Chip power supply and monitored voltage input. Operating range 1.0 V to 5.5 V, absolute max +6.0 V. Typical supply current 8-14 uA. This is the voltage sensed against the internal reset threshold.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • MAX809R

CAD (KiCad official)

  • Symbol: MAX809R
  • 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
max809r.step 59 KB You want the bare part, or you mark your own boards.
max809r-etched.step 1.5 MB You want the part with MAX809R already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 361 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