Switches and Latches
Magnetic 1D and 2D latches with industry-leading jitter performance using both TMR and Hall technology that is revolutionizing the mechanical design of motors and encoders, the ability to survive the harshest automotive voltage transients, the broadest portfolio of continuous-time switches and latches, and a full offering of TMR Industrial, Consumer, and Medical focused solutions are just some of the reasons why Allegro is a clear leader in digital position sensing.
Need help finding the right solution?
To determine the part best suited for your system, please refer to our Switches and Latches Selection Guide.
Browse by category
Hall-Effect Latches and Bipolar Switches
Our high-performance magnetic latches offer you industry-leading jitter performance, EMC/ESD robustness, and magnetic precision—all at competitive price points.
Dual Hall-Effect Latches
Vertical Hall Technology by Allegro (VHT) sensing solutions revolutionize motors and encoders, delivering quadrature signals independent of magnet pitch or air gap.
Two-Wire Hall-Effect Switches
OEMs and tier one providers choose from our broad portfolio of Hall-effect switches for applications like seat belt buckles, seat track, shift selectors, door ajar, and so much more.
Three-Wire Hall-Effect Switches
Perfect for sensing absolute position or proximity in harsh automotive environments, our three-wire switches are ideal for applications like shift selectors, door ajar, user interfaces and vane-interrupt systems.
Nanopower TMR & Micropower Hall Switches
Extend the life of your battery-powered devices with these integrated Hall-effect sensor ICs. These switches offer low power consumption and are ideal for use in on/off switching applications and for detection of tampering in utility meters.
Special-Purpose Devices
Don't see the right solution? Take a look at products we've developed for very specific applications. We offer deep and broad applications expertise to help you find—or create—a device that fits your needs.
Featured Products
APS12202 and APS12212
Hall-effect latches are suited for operation over extended temperature ranges (up to 150°C).
APS11202
Hall-Effect Switch for Automotive, Consumer, and Industrial Applications
APS11753
Micropower Switches for Battery-Powered and Eco-Conscious Applications
APS12753
Micropower Latches for Battery-Powered and Eco-Conscious Applications
Additional Resources
Blog
Switches vs. Latches: Understanding the Key Differences and Their Applications
Discover how Hall-effect switches and latches, essential magnetic sensors, power smartphones, industrial equipment, automotive systems, and DC motors. Learn their differences and applications in this insightful blog post.
Whitepaper
Maximizing Robust Window Open Detection Systems with Micropower Hall-Effect Switches and Latches
Let's explore the intricacies of designing a robust and effective window open detection solution for
security systems.
Application Note
Two-and-Three-Wire-Sensor-Interfaces
AN296233 - Electrical interfaces for active sensor integrated circuits (ICs) include both two-wire and three-wire interfaces. These two technology styles are named for the number of required connections needed to communicate the sensor output. This application note discusses use and tradeoffs of both interface styles.
Blog
The Power of Precision: Revolutionizing Switches and Latches with TMR Technology
This blog explores the benefits of TMR technology for switches and latches, highlighting how it's transforming these essential components.
Application Note
Smart Locks
New keyless, smart locks are emerging and replacing the traditional key deadbolt locks. With this new technology, the key is no longer used, and the deadbolt position is now controlled by the smart lock itself and not the user with their key.
Application Note
General Applications Using The APS13568
AN296238 - In this applicate note, we discuss the use of the APS13568, an integrated circuit that combines an ultra-sensitive, omnipolar, micropower Hall-effect switch with a linear programmable current regulator which can provide up to 150 mA current to drive high brightness LEDs.
Whitepaper
Maximize Your Battery Life with Micropower Switch and Latch Sensors
This whitepaper delves into the technical advantages of the APS11753 micropower switch and APS12753 micropower latch, showcasing their value propositions and the system-level benefits they bring to power-sensitive applications.
Application Note
Introduction to Hall-Effect Switches and Conversion from Mechanical Switches
AN296192 - This application note will discuss the technical considerations necessary to aid with the replacement of an on/off mechanical switch with a Hall-effect switch.
Guide
APS13568 Proto Board User Manual
The APS13568 integrates an ultrasensitive Hall-effect switch with a linear programmable current regulator that provides up to 150 mA for driving a string of high brightness LEDs.
Application Note
AN296331 - How to Choose the Best Micropower Switch or Latch Magnetic Sensor for Your Application
This application note discusses the fundamental principles that govern micropower switch and latch magnetic sensors.
Guide
APS11900 Programming Guide
This document describes two approaches to programming the APS11900 and should be used as a companion to the product datasheet.
Application Note
Unipolar Switch Hall-Effect IC Basics
There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches.
Brochure
Revolutionizing Power Efficiency in Modern Applications
Allegro’s Micropower Magnetic Hall switch and latch sensors are at the forefront of innovation, transforming the design of battery-powered and energy-conscious applications.
Application Note
TMR Digital Latches in Point-Level Liquid Sensors
Liquid-level sensors are used in a variety of applications in the industrial and consumer marketplace and play a vital role in providing the necessary data to the host system.
Application Note
Latching Switch Hall-Effect IC Basics
There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Latching Hall-effect sensor ICs, often referred to as "latches," are digital output Hall-effect switches that latch output states.