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A1222LLHLT-T

Public Made by Adom

by adom

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

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A1222LLHLT-T

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

A1222LLHLT-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 power supply to chip; operating range 3 to 24 V (absolute maximum 26.5 V forward, -30 V reverse).
2 VOUT output Open-drain output from circuit that sinks up to 25 mA continuous, with short-circuit current limit of 30 to 60 mA and 26 V maximum off voltage.
3 GND power_in Ground connection.

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 (absolute max) 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 TA -40 150 °C Range L 3
Maximum Junction Temperature TJ(max) 165 °C 3
Maximum Junction Temperature TJ(max) 175 °C For 500 hours 3
Storage Temperature Tstg -65 170 °C 3
Forward Supply Voltage VCC 3 24 V Operating, TJ < 165°C 4
Output Leakage Current IOUTOFF 10 µA VOUT = 24 V, B < BRP 4
Output Saturation Voltage VOUT(SAT) 185 500 mV IOUT = 20 mA, B > BOP 4
Output Current Limit 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
Chopping Frequency fC 800 kHz 4
Output Rise Time tr 0.2 2 µs RL = 820 Ω, CL = 20 pF 4
Output Fall Time tf 0.1 2 µs RL = 820 Ω, CL = 20 pF 4
Supply Current (On) ICC(ON) 4 mA B > BOP, VCC = 12 V 4
Supply Current (Off) ICC(OFF) 4 mA B < BRP, VCC = 12 V 4
Reverse Supply Current IRCC -5 mA VRCC = -20 V 4
Supply Zener Clamp Voltage VZ 28 V ICC = 5 mA; TA = 25°C 4
Zener Impedance IZ 50 Ω ICC = 5 mA; TA = 25°C 4
Operate Point BOP 70 110 150 G A1222 4
Release Point BRP -150 -110 -70 G A1222 4
Hysteresis (BOP, BRP) BHYS 140 220 300 G A1222 4
Package Thermal Resistance RθJA 228 °C/W Package LH, 1-layer PCB with copper limited to solder pads 5
Package Thermal Resistance RθJA 110 °C/W Package LH, 2-layer PCB with 0.463 in.2 of copper area each side connected by thermal vias 5

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 through-hole mounting. Both packages are lead (Pb) free, with 100% matte-tin-plated leadframes. 2

CAD (KiCad official)

  • Symbol: A1222LLHLT-T
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23W (KiCad packages3D, STEP)
  • 3D model files: a1222llhlt-t-etched.step / a1222llhlt-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a1222llhlt-t.step / a1222llhlt-t.glb are the bare package body.

Provenance

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

  • Datasheet: Allegro MicroSystems, LLC datasheet (16 pp, sha256 4adf48ef86300431, retrieved 2026-10-26, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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