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A1123LLHLX-T

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Allegro MicroSystems, LLC Magnetic Sensors, SOT-23W. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsensorsa1123llhlx-tfactory-2.0.0extractor-text

Verified A1123LLHLX-T

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: A1123LLHLX-T · SOT-23W · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 18-page datasheet
  • ✓distributor: lcsc C2152786, digikey 620-A1123LLHLX-TTR-ND, mouser 250-A1123LLHLX-T
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-qatefdwe/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ a1123llhlx-t.kicad_sym✓ a1123llhlx-t.kicad_mod✓ a1123llhlx-t.step
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

A1123LLHLX-T

Allegro MicroSystems, LLC · Magnetic Sensors · SOT-23W

A1123LLHLX-T from Allegro MicroSystems, LLC, in a SOT-23W. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VCC power_in Connects the power supply to the chip; forward supply voltage is 3 to 24 V in operation (TJ < 165°C), with an absolute maximum forward supply voltage of 26.5 V.
2 VOUT output Short-circuit-protected open-drain output that sinks up to 25 mA continuous, with an output off voltage rating of 26 V maximum.
3 GND power_in Ground connection for the device.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Forward Supply Voltage VCC 26.5 V 3
Reverse Supply Voltage VRCC -30 V 3
Output Off Voltage VOUT 26 V 3
Continuous Output Current IOUT 25 mA 3
Reverse Output Current IROUT -50 mA 3
Operating Ambient Temperature, Range L TA -40 150 °C Range L 3
Maximum Junction Temperature TJ(max) 165 °C 3
Storage Temperature Tstg -65 170 °C 3
Forward Supply Voltage VCC 3 24 V Operating, TJ < 165°C 4
Output Leakage Current (A1123) IOUTOFF 10 µA VOUT = 24 V, B < BRP 4
Output Saturation Voltage (A1123) VOUT(SAT) 185 500 mV IOUT = 20 mA, B > BOP 4
Output Current Limit (A1123) IOM 30 60 mA B > BOP 4
Power-On Time tPO 25 µs VCC > 3.0 V, B < BRP(min), 10 G, B > BOP(max) + 10 G 4
Output Rise Time tr 0.2 2 µs RL = 820 Ω, CS = 20 pF 4
Output Fall Time tf 0.1 2 µs RL = 820 Ω, CS = 20 pF 4
Supply Current, On (A1123) ICC(ON) 4 mA VCC = 12 V, B > BOP 4
Supply Current, Off (A1123) ICC(OFF) 4 mA VCC = 12 V, B < BRP 4
Reverse Supply Current IRCC -5 mA VRCC = -30 V 4
Supply Zener Clamp Voltage VZ 28 V ICC = 5 mA; TA = 25°C 4
Operate Point (A1123) BOP 205 280 355 G 5
Release Point (A1123) BRP 150 225 300 G 5
Hysteresis (A1123) BHYS 30 55 80 G 5
Package Thermal Resistance, LH 1-layer PCB RθJA 228 °C/W Package LH, 1-layer PCB with copper limited to solder pads 6
Package Thermal Resistance, LH 2-layer PCB RθJA 110 °C/W Package LH, 2-layer PCB with 0.463 in.2 of copper area each side connected by thermal vias 6

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin SIP for through-hole mounting. Each package type is lead (Pb) free (suffix, -T), with a 100% matte-tin-plated leadframe. 1

CAD (KiCad official)

  • Symbol: A1123LLHLX-T
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23W (KiCad packages3D, STEP)
  • 3D model files: a1123llhlx-t-etched.step / a1123llhlx-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a1123llhlx-t.step / a1123llhlx-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Allegro MicroSystems, LLC datasheet (18 pp, sha256 2e2d51c564dee4c6, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF