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US1881KUA-AAA-000-BU

US1881KUA-AAA-000-BU

Melexis Technologies NV
Digital Switch Latch Open Drain Hall Effect TO-92-3
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Overview

The US1881KUA-AAA-000-BU is a bipolar Hall-effect latch designed for high-performance commutation and speed sensing applications. It features a chopper-stabilized amplifier to eliminate offset and a Schmitt trigger for clean, jitter-free switching. Operating from 3.5V to 24V, this through-hole sensor provides an open-drain output capable of sinking up to 50mA.

Why Choose This Part

The component utilizes a dynamic offset cancellation system and a chopper-stabilized architecture to maintain stable switching points across its -40C to 125C operating range. Its wide supply voltage range and high output current capability make it compatible with both low-voltage logic and higher-voltage industrial or automotive rails.

Applications

Brushless DC (BLDC) Motor Commutation
Used to detect rotor position in permanent magnet motors for precise electronic commutation.
Speed and RPM Sensing
Ideal for counting pulses from a multi-pole ring magnet to calculate rotational velocity.
Incremental Encoders
Pairs with magnetic discs to provide feedback in industrial positioning systems.
Automotive Window and Sunroof Control
Detects the position and movement of motor-driven assemblies in vehicle cabins.

Key Specifications

Function Latch
Technology Hall Effect
Output Type Open Drain
Polarization North Pole, South Pole
Mounting Type Through Hole
Sensing Range 9.5mT Trip, -9.5mT Release
Package / Case TO-226-3, TO-92-3 Short Body
Test Condition 125degC
Voltage - Supply 3.5V ~ 24V
Operating Temperature -40degC ~ 125degC (TA)
Current - Output (Max) 50mA
Current - Supply (Max) 5mA
Supplier Device Package TO-92-3

Getting Started

Connect a 3.5V to 24V supply across pins 1 (VDD) and 2 (GND), and place a 10k ohm pull-up resistor between pin 3 (OUT) and the logic supply. The device requires a South pole to trip (B > BOP) and a North pole to release (B < BRP); ensure your magnet orientation provides alternating poles to the branded face of the TO-92 package.

Also Consider

DRV5013ADQLPGM TITexas Instruments - Offers a wider supply voltage range up to 38V and built-in reverse supply protection for harsh environments.