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MCP120T-270I

Public Made by Adom

by adom

Microchip Supervisor and Reset ICs, SOT-23. 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

markdown

MCP120T-270I

Microchip · Supervisor and Reset ICs · SOT-23

MCP120T-270I from Microchip, in a SOT-23. 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 VDD power_in Positive supply and monitored voltage input. Operating range 1.0 V to 5.5 V (absolute max 7.0 V). The internal bandgap comparator continuously compares VDD against the 2.625 V (typ) trip point for the -270 variant. A 0.1 μF bypass capacitor placed close to this pin is recommended for transient immunity.
2 RST output Active-low reset output (open-drain on the MCP120). Driven low whenever VDD is below VTRIP and held low for tRPU = 350 ms (typ) after VDD returns above VTRIP. VOL ≤ 0.4 V at IOL = 3.2 mA (for the -270 trip variant). Requires an external pull-up resistor to the microcontroller supply because the MCP120 has NO internal pull-up (that is only on the MCP130).
3 VSS power_in Ground / negative supply return. Connect to the system ground plane.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • MCP120T-270I/TT
  • MCP120-270I/TO
  • MCP120-270I/SN

CAD (KiCad official)

  • Symbol: MCP120T-270I
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mcp120t-270i-etched.step / mcp120t-270i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp120t-270i.step / mcp120t-270i.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mcp120t-270i.step 59 KB You want the bare part, or you mark your own boards.
mcp120t-270i-etched.step 1.8 MB You want the part with MCP120T-270I already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 454 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: Microchip datasheet (16 pp, sha256 4a71b5087051894f, retrieved 2026-08-17, tier: manufacturer)
  • 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