HALL EFFECT LATCH SWITCH SOT23W 3-24V
Allegro MicroSystems

Bypass caps, pull-ups, strapping resistors, custom silkscreen & more
Design a Custom BoardChopper-stabilized Hall-effect sensor IC that functions as a magnetic switch latch, outputting on with south pole and off with north pole. Features integrated voltage regulator (3-24V), 25mA open-drain output with short-circuit protection, and dynamic offset cancellation for superior temperature stability to 150°C. Automotive-qualified (AEC-Q100) for motor commutation, position sensing, and power actuation applications.
SOT-23's tiny 0.95mm pin pitch and compact form factor make hand-soldering tedious and prone to bridging errors. A breakout board breaks out the three pins to standard 0.1" spacing for breadboard prototyping, eliminating the need for specialized soldering equipment and enabling fast circuit iteration with transistors, diodes, and small-signal components.
ELECTRICAL CHARACTERISTICS
| Manufacturer | Allegro MicroSystems |
| Part Number | A1220LLHLT-T |
| Package | SOT-23W |
| Pin Count | 3 |
| Current - Output (Max) | 25mA |
| Current - Supply (Max) | 4mA |
| Output Type | Open Drain |
| Voltage - Supply | 3V ~ 24V |
BILL OF MATERIALS
PCB SPECIFICATIONS
< 0.9" (straddles breadboard)
2.54mm standard
Lead-free, reflow assembled
FR4, lead-free HASL