Infineon Technologies TLV49644TAXBXA1

Overview

TLV49644TAXBXA1 from Infineon Technologies is a unipolar Hall effect switch IC designed for precision position detection in consumer-grade systems. It operates from 3.0 V to 26 V, delivers ±0.5 mT magnetic threshold stability over temperature, features open-drain output with overcurrent/overtemperature protection, and uses TO92S-3-1 package for reliable mounting in space-constrained enclosures.

For engineers reviewing the TLV49644TAXBXA1 datasheet, TLV49644TAXBXA1 pinout, TLV49644TAXBXA1 application, or TLV49644TAXBXA1 equivalent, key selection criteria include BOP = 10 mT (±0.5 mT), BRP = 8.5 mT, hysteresis = 1.5 mT, supply current = 1.6 mA, and operation across –40°C to +125°C ambient range.

Technical Context

The TLV49644TAXBXA1 integrates a spinning Hall probe with chopper-stabilized amplifier and comparator with built-in hysteresis, enabling precise unipolar switching without external components. Its voltage regulator and bias compensation circuits maintain stable magnetic thresholds across wide supply (3–26 V) and temperature (–40°C to 125°C) ranges.

It implements active error compensation to suppress offset drift and uses an oscillator-driven sequencer to control internal timing of signal conditioning blocks. The open-drain output supports direct interface to microcontroller GPIOs or logic-level inputs with external pull-up, eliminating need for level-shifting circuitry.

Key Specifications

Pinout & Package

TLV49644TAXBXA1 is housed in a leaded, halogen-free TO92S-3-1 package (JEDEC TO-92 variant), optimized for through-hole assembly and mechanical robustness in vibration-prone consumer devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unipolar Hall switch applications.

Compared with TLV49644TAXBXA1, TLV49644TAXBXA2 offers identical performance with alternate traceability, while US5881LUA trades integrated protection and threshold stability for lower power and cost-requiring external thermal safeguards in demanding environments.

Availability

TLV49644TAXBXA1 is available at Aetrix Electronics and suitable for laptop lid detection, smart appliance door sensing, wireless earbud case monitoring, and POS terminal cover verification requiring stable component supply across high-mix, low-volume production runs.

Supply support for TLV49644TAXBXA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, sensor, and automotive ICs, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949 standards.

TLV49644TAXBXA1 belongs to Infineon's TLV496x unipolar Hall switch product line, engineered for high-precision, low-power position sensing in consumer electronics where magnetic threshold stability and supply flexibility are critical.

FAQ

What is the magnetic field polarity requirement for TLV49644TAXBXA1 activation?

TLV49644TAXBXA1 is a unipolar Hall switch that activates only in the presence of a south-pole magnetic field oriented perpendicular to the package top surface. It does not respond to north-pole fields or lateral field components. Activation occurs at BOP = 10 mT, and release occurs at BRP = 8.5 mT, with hysteresis preventing oscillation near threshold.

Can TLV49644TAXBXA1 operate directly from a 24 V supply without external regulation?

Yes. TLV49644TAXBXA1 integrates an internal voltage regulator supporting 3.0 V to 26 V supply range. It draws only 1.6 mA at 24 V and includes overvoltage and overtemperature protection, allowing direct connection to unregulated 24 V rails commonly found in smart appliances and industrial consumer equipment.

Is a pull-up resistor required on the Q output pin?

Yes. The Q pin is an open-drain output and requires an external pull-up resistor to VDD or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus capacitance requirements. No pull-down resistor is needed, and the output remains high-impedance when inactive.

How does the spinning Hall probe improve performance versus conventional Hall elements?

The spinning Hall probe rotates the current path in silicon to cancel offset voltage and 1/f noise, achieving ±0.5 mT magnetic threshold stability over –40°C to +125°C. This eliminates need for factory trimming or temperature compensation algorithms, enabling single-point calibration and consistent switching behavior across environmental stress conditions.