| Parameters | 
                                
                                                                                                            
                                            | Number of Terminations | 
                                            3 | 
                                        
                                                                            
                                            | Type | 
                                            Omnipolar Switch | 
                                        
                                                                            
                                            | Terminal Finish | 
                                            Matte Tin (Sn) | 
                                        
                                                                            
                                            | Technology | 
                                            Hall Effect | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            2.4V~5.5V | 
                                        
                                                                            
                                            | Terminal Position | 
                                            DUAL | 
                                        
                                                                            
                                            | Terminal Form | 
                                            GULL WING | 
                                        
                                                                            
                                            | Peak Reflow Temperature (Cel) | 
                                            260 | 
                                        
                                                                            
                                            | Supply Voltage | 
                                            3V | 
                                        
                                                                            
                                            | Terminal Pitch | 
                                            0.95mm | 
                                        
                                                                            
                                            | Time@Peak Reflow Temperature-Max (s) | 
                                            40 | 
                                        
                                                                            
                                            | Function | 
                                            Omnipolar Switch | 
                                        
                                                                            
                                            | Current - Supply (Max) | 
                                            2mA | 
                                        
                                                                            
                                            | Qualification Status | 
                                            Not Qualified | 
                                        
                                                                            
                                            | Output Type | 
                                            Open Drain | 
                                        
                                                                            
                                            | Max Output Current | 
                                            1mA | 
                                        
                                                                            
                                            | Operating Supply Voltage | 
                                            3V | 
                                        
                                                                            
                                            | Supply Voltage-Max (Vsup) | 
                                            5.5V | 
                                        
                                                                            
                                            | Supply Voltage-Min (Vsup) | 
                                            2.4V | 
                                        
                                                                            
                                            | Operating Supply Current | 
                                            2mA | 
                                        
                                                                            
                                            | Polarization | 
                                            North Pole, South Pole | 
                                        
                                                                            
                                            | Output Current | 
                                            1mA | 
                                        
                                                                            
                                            | Test Condition | 
                                            -40°C ~ 150°C | 
                                        
                                                                            
                                            | Sensing Range | 
                                            ±7mT Trip, ±1mT Release | 
                                        
                                                                            
                                            | Length | 
                                            2.98mm | 
                                        
                                                                            
                                            | Width | 
                                            1.91mm | 
                                        
                                                                            
                                            | REACH SVHC | 
                                            No SVHC | 
                                        
                                                                            
                                            | RoHS Status | 
                                            ROHS3 Compliant | 
                                        
                                                                            
                                            | Lead Free | 
                                            Lead Free | 
                                        
                                                                            
                                            | Factory Lead Time | 
                                            8 Weeks | 
                                        
                                                                            
                                            | Mount | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Mounting Type | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Package / Case | 
                                            SOT-23W | 
                                        
                                                                            
                                            | Number of Pins | 
                                            3 | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~150°C TA | 
                                        
                                                                            
                                            | Packaging | 
                                            Tape & Reel (TR) | 
                                        
                                                                            
                                            | Published | 
                                            2011 | 
                                        
                                                                            
                                            | JESD-609 Code | 
                                            e3 | 
                                        
                                                                            
                                            | Pbfree Code | 
                                            yes | 
                                        
                                                                            
                                            | Part Status | 
                                            Active | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            1  (Unlimited) | 
                                        
                                                                                                    
                            
                         
                                                A3213LLHLT-T Overview
This Tape & Reel (TR) package protects the magnetic switch from damage. In order to ensure safety, magnetic switches are packaged in SOT-23W packages. Good performance is achieved by magnetic switches that can supply 2mA as maximum current. It is possible for these switches to operate at a maximum current of 1mA. There are 3 pins on the switches that allow them to work. This document has 3 terminations. As a general rule, switches should output a current of 1mA. Whenever this switch works, it should provide a voltage of 5.5V. In normal conditions, this switch will deliver 3V voltage. It is possible for this magnetic switch to provide a voltage of 2.4V at its minimum. When the magnetic switches are operating, they will supply 3V voltage. 
A3213LLHLT-T Features
Packaging: Tape & Reel (TR)
Moisture Sensitivity Level (MSL): 1  (Unlimited)
Supply Voltage: 2.4V~5.5V
Operating Temperature: -40°C~150°C TA
Mounting Type: Surface Mount
3 Pins
3 Terminations
Output Type: Open Drain
Maximum Supply Current: 2mA
A3213LLHLT-T Applications
There are a lot of Allegro MicroSystems A3213LLHLT-T Magnetic Switches applications. 
- Open/close sensor for LCD screens/doors/lids/trunks
 - Steering position
 - Magnetic encoders
 - Compressor speed
 - Tachometer
 - Speed and RPM (revolutions per minute) sensing
 - Synchronization
 - Flow metering
 - Position tracking
 - Counter pickup