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A1220LLHLT-T

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by adom

Allegro MicroSystems LLC Hall Sensor, SOT-23W. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs a1220llhlt-t: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
a1220llhlt-t-etched.fit.json a1220llhlt-t: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
a1220llhlt-t-etched.glb a1220llhlt-t: one-pass backfill (re-etched) · Ray
a1220llhlt-t-etched.step a1220llhlt-t: one-pass backfill (re-etched) · Ray
a1220llhlt-t-hero.glb Publish 0.2.1 · Ray
a1220llhlt-t-hero.overlay.json Publish 0.2.1 · Ray
a1220llhlt-t.glb Publish 0.1.0 · Ray
a1220llhlt-t.kicad_mod Publish 0.1.0 · Ray
a1220llhlt-t.kicad_sym Publish 0.1.0 · Ray
a1220llhlt-t.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
a1220llhlt-t.step Publish 0.1.0 · Ray
package.json Publish 0.2.2 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.2 · Ray
README.md a1220llhlt-t: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

A1220LLHLT-T

Allegro MicroSystems LLC · Hall Sensor · SOT-23W

A1220LLHLT-T from Allegro MicroSystems LLC, in a SOT-23W. 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 Supply voltage input. Operating range 3.3 V to 24 V. Should be bypassed with a 0.1 uF ceramic capacitor to GND close to the device.
2 VOUT output Open-drain Hall switch output. Requires an external pull-up resistor to VCC or another rail. Pulls low when the magnetic field crosses the operate threshold and releases at the release threshold.
3 GND power_in Ground reference.

Key specifications

Parameter Value
Manufacturer Allegro MicroSystems LLC
Package SOT-23W
Category Sensor
Pins 3

Ordering variants

  • A1220LLHLT-T
  • A1220LLHLT-TLUA-T

CAD (KiCad official)

  • Symbol: A1220LLHLT-T
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23W (KiCad packages3D, STEP)
  • 3D model files: a1220llhlt-t-etched.step / a1220llhlt-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a1220llhlt-t.step / a1220llhlt-t.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
a1220llhlt-t.step 59 KB You want the bare part, or you mark your own boards.
a1220llhlt-t-etched.step 1.4 MB You want the part with A1220LLHLT-T already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 369 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: Allegro MicroSystems LLC datasheet (16 pp, sha256 23fb399359de64eb, 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