Melexis

2-Wire 2-bit Switch

MLX92344
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The MLX92344 is a highly flexible, PCB-less sensor IC for contactless detection of up to four positions over a standard 2-wire interface, eliminating bulky microswitches and simplifying automotive body electronics.

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Top features

  • Up to 4 output states with a 2-wire current interface

  • Programmable currents from 3mA to 28mA

  • Programmable dual magnetic thresholds pairs

  • Programmable magnetic Latch, Unipolar or Omnipolar Switch functions

  • Temperature compensation coefficient in the range -2000 to 0 ppm/°C

  • Wide magnetic range from 0.5mT to 200mT (40mT for IMC variant)

  • Optional IMC integration for lateral magnetic sensing (X or Y)

  • Diagnostics

    • Integrated self-diagnostic functions activating a dedicated Safe State

    • Parallel or Sequential diagnostic modes

  • Operating voltage range from 2.7 V to 28 V (32 V AMS)

  • Operating temperature from -40°C to +150°C

  • Certifications

    • ISO 26262 ASIL B SEooC

    • AEC-Q100

    • ESD level (8 kV HBM, 25 kV system-level)

  • Packages, RoHS compliant

    • UA (Through hole)

    • UA with integrated capacitor (PCB-less)

    • TSOT23 (Surface mount)

  • Integrated protections

    • Reverse supply voltage protection

    • Thermal protection

    • Under-voltage reset

Discover all features
2-Wire 2-bit Switch  -  MLX92344

Product description

The MLX92344 is a revolutionary monolithic sensor IC sensitive to perpendicular or lateral magnetic fields. Designed to meet the stringent demands of modern automotive body electronics, it introduces an industry-first approach to programmable multi-position detection within a single device.

By providing up to four discrete output states over a standard two-wire interface, a single MLX92344 can fully replace complex, space-consuming dual-sensor or multi-microswitch configurations. The supply current for each state is independently programmable from 3 mA to 28 mA, enabling tight state separation (±0.5 mA tolerances) that perfectly aligns with existing ECU input windows without requiring hardware changes.

Developed as a Safety Element out of Context (SEooC) in accordance with ISO 26262 (ASIL B), the MLX92344 features robust on-chip diagnostic mechanisms. In the event of a fault, the device transitions to a dedicated safe state.

Furthermore, End-of-Line (EoL) programmability allows manufacturers to calibrate away mechanical assembly tolerances directly in production to maximize system accuracy.

Development Support

Production calibration is fully supported via the PTC-04 programmer. For engineering development, you can also use the LatchSwitchEVB2.

Applications

  • Automotive Body Electronics: Seat track position monitoring (3 or 4 positions for adaptive airbag deployment), e-frunk / front hood latch locking mechanisms, steering column extension detection, smart charging port doors, and smooth soft-closing door systems.
  • Industrial & Industrial Mobility: Robotics, smart appliances, smart buildings, and energy management systems.

Features and benefits

  • Up to 4 output states with a 2-wire current interface

  • Programmable currents from 3mA to 28mA

  • Programmable dual magnetic thresholds pairs

  • Programmable magnetic Latch, Unipolar or Omnipolar Switch functions

  • Temperature compensation coefficient in the range -2000 to 0 ppm/°C

  • Wide magnetic range from 0.5mT to 200mT (40mT for IMC variant)

  • Optional IMC integration for lateral magnetic sensing (X or Y)

  • Diagnostics

    • Integrated self-diagnostic functions activating a dedicated Safe State

    • Parallel or Sequential diagnostic modes

  • Operating voltage range from 2.7 V to 28 V (32 V AMS)

  • Operating temperature from -40°C to +150°C

  • Certifications

    • ISO 26262 ASIL B SEooC

    • AEC-Q100

    • ESD level (8 kV HBM, 25 kV system-level)

  • Packages, RoHS compliant

    • UA (Through hole)

    • UA with integrated capacitor (PCB-less)

    • TSOT23 (Surface mount)

  • Integrated protections

    • Reverse supply voltage protection

    • Thermal protection

    • Under-voltage reset

Documents and tools

Datasheet(s)
Product flyer(s)

Related tech talks

Rethinking Seat Track Position Detection: From Mechanical Switching to Intelligent Automotive Sensing

Rethinking Seat Track Position Detection: From Mechanical Switching to Intelligent Automotive Sensing

Seat track detection is shifting from ambiguous multi-sensor setups to Melexis's MLX92344 single-sensor IC. It uses programmable multi-level output for accurate, reliable multi-position sensing within existing two-wire automotive architectures, reducing complexity and improving safety.
Evolving Vehicle Safety with Intelligent Charging Port Functionality and Direct Flap Monitoring

Evolving Vehicle Safety with Intelligent Charging Port Functionality and Direct Flap Monitoring

Light is on intelligent charging port functionality. Discover a flexible lighting solution that can interface other functionalities such as temperature or flap's open or closed status.
Smart and connected starts from Latch & Switch ICs

Smart and connected starts from Latch & Switch ICs

Compared to mechanical switches, Latch & Switch ICs play a key role in numerous applications. They increase flexibility, reliability, functional safety, repeatability, accuracy and the yield of the final assembly.

Videos

World's first 2-wire 2-bit Hall switch

Melexis unveils the MLX92344, a highly flexible PCB-less solution for contactless detection of up to four positions, eliminating the need for bulky microswitches. While ensuring backward compatibility over 2-wires, it introduces fully programmable current levels and magnetic thresholds. This innovation enables the next generation of automotive body electronics, including safety for seat track positioning, smoothness in soft closing doors, and miniaturization of multi-level trunk locks.

Related products

MLX92221 - 2-Wire Hall Latch Position Sensor - Melexis
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MLX92242 - End-Of-Line Programmable 2-Wire Hall Latch/Switch - Melexis
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MLX92242 - End-Of-Line Programmable 2-Wire Hall Latch/Switch - Melexis
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Practical applications

Application - E-bike

E-bike

Combining exercise and mobility was never so easy thanks to E-bikes. Because they support you while moving, they are an attractive option. Modern technology optimizes the pedal assist by the electrical engine while minimizing the battery usage. Thanks to Melexis ICs you control the calories and the battery energy you burn.
E-motorcycle & E-scooter

E-motorcycle & E-scooter

The current focus on electric vehicules is boosting the whole e-mobility industry. It is especially beneficial for the 2 and 3 wheelers which also require to solve similar constraints: from battery management (sufficient power, longevity and safety) to drive train efficiency and personalization.
application Main DCDC thumbnail

main DCDC

The DC/DC converter produces low voltage DC electricity (e.g. 12 V, 14 V, 24 V) from the high voltage battery (e.g. 48 V up to 800 V) to supply the boardnet and charge the low voltage battery.
Application - Motorcycle

Motorcycle

The days of purely mechanical motorcycles are over. Nowadays they are equipped with state-of-the-art electronics to enhance safety, performance and comfort. While you are winding down the mountain roads, our sensors take care of your ABS, gear shifting, throttle, tilt control and tire pressure.
Application diagram onboard charger

Onboard charger

The function of the onboard charger is to efficiently, reliably and safely convert AC electricity from the electrical grid (e.g. household plug) to DC electricity so it can be stored in the battery of the electrified vehicle (xEV).

 
Traction inverter and motor

Traction inverter & motor

In electric vehicles, the inverter converts DC power from the battery to AC power for the motor drive, which in turn transforms it into propulsion power. The efficiency of this system has a direct impact on the all-electric range, road performance and comfort.