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KIA7042AF-RTF

Public Unreviewed

by Ray

KEC Semicon Supervisor and Reset ICs, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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KIA7042AF-RTF

KEC Semicon · Supervisor and Reset ICs · SOT-89-3

KIA7042AF-RTF from KEC Semicon, in a SOT-89-3. 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 VCC power_in Positive supply and monitored input. Absolute max -0.3 V to +15.0 V; nominal operation 5 V. Internally sensed and compared against the 4.2 V typical detect threshold (VS min 4.05 V, max 4.35 V).
2 GND power_in Ground / VEE reference (0 V). On the SOT-89 package the heat sink tab is common to this pin.
3 OUT output Active-low reset output, open-collector NPN. Pulls low (VOL ≤ 0.4 V at RL = 200 Ω) when VCC drops below the detect threshold; releases (high-Z, IOH ≤ 0.1 μA at VCC = 15 V) when VCC rises above VS+hysteresis. Sinks ≥20 mA at 25 °C. Requires an external pull-up.

Key specifications

Parameter Value
Manufacturer KEC Semicon
Package SOT-89-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • KIA7042AF-RTF
  • KIA7042AF-RTFAP
  • KIA7042AF-RTFAT

CAD (KiCad official)

  • Symbol: KIA7042AF-RTF
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
kia7042af-rtf.step 57 KB You want the bare part, or you mark your own boards.
kia7042af-rtf-etched.step 1.3 MB You want the part with KIA7042AF-RTF already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 383 faces against 42 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: KEC Semicon datasheet (4 pp, sha256 ee964c11be24fd17, 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