Infineon Technologies TLV49645TAXBXA1

Overview

TLV49645TAXBXA1 from Infineon Technologies is a unipolar Hall effect switch IC designed for precise 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 leaded, halogen-free mounting in compact enclosures.

For engineers reviewing the TLV49645TAXBXA1 datasheet, TLV49645TAXBXA1 pinout, TLV49645TAXBXA1 application, or TLV49645TAXBXA1 equivalent, key selection criteria include BOP = 7.5 mT / BRP = 5.0 mT unipolar switching behavior, 1.6 mA supply current at 5 V, -40°C to +125°C operating range, and compatibility with unregulated power rails in cost-sensitive motion-sensing designs.

Technical Context

The TLV49645TAXBXA1 integrates a spinning Hall probe with chopper-stabilized amplifier, low-pass filter, and comparator with 2.5 mT hysteresis to reject noise and ensure stable switching under varying thermal and EMI conditions. Its voltage regulator enables direct connection to automotive or industrial 12 V/24 V rails without external LDO.

Internal bias and compensation circuits actively correct offset drift across temperature, maintaining BOP variation ≤ ±0.5 mT from -40°C to 125°C. The device powers up in a defined state with controlled start-up timing (t_PU = 120 µs max) and includes integrated overtemperature shutdown and output short-circuit protection.

Key Specifications

Pinout & Package

TLV49645TAXBXA1 is housed in the TO92S-3-1 package: a through-hole, leaded, halogen-free plastic case with 2.54 mm lead pitch and center-to-center sensitive area aligned to Pin 2 (GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with A3263LUA-T and US1881EUA-ABA-000-RE, TLV49645TAXBXA1 offers balanced sensitivity (7.5 mT), robust thermal stability (±0.5 mT), and integrated protection - making it optimal for mid-tier consumer position sensing where cost, reliability, and ease of integration are jointly prioritized.

Availability

TLV49645TAXBXA1 is available at Aetrix Electronics and suitable for laptop lid detection, smart appliance door sensing, industrial control panel switches, and motorized furniture position feedback requiring stable component supply across production lifecycles.

Supply support for TLV49645TAXBXA1 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.

TLV49645TAXBXA1 belongs to Infineon's TLV496x unipolar Hall switch family, engineered for high-precision, low-cost position detection in consumer electronics where magnetic threshold stability and supply flexibility outweigh automotive-grade qualification requirements.

FAQ

What is the magnetic field polarity requirement for TLV49645TAXBXA1 activation?

TLV49645TAXBXA1 is a unipolar Hall switch activated only by the south pole of a magnet approaching the marked side of the TO92S-3-1 package. The north pole has no effect. Activation occurs at BOP = 7.5 mT, and release occurs at BRP = 5.0 mT, providing 2.5 mT hysteresis to prevent oscillation near the threshold.

Can TLV49645TAXBXA1 operate directly from a 24 V supply without external regulation?

Yes - its 3.0 V to 26 V supply range and integrated voltage regulator allow direct connection to 24 V industrial or automotive rails. No external LDO or filtering is required, though a 100 nF ceramic capacitor between VDD and GND is recommended for local decoupling per the datasheet layout guidelines.

Does TLV49645TAXBXA1 require a pull-up resistor on the Q output?

Yes - the Q pin is an open-drain N-channel MOSFET output and must be pulled up to a logic-compatible voltage (e.g., 3.3 V or 5 V) via an external resistor. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus capacitance; 4.7 kΩ is commonly used for general-purpose interfacing.

How does the active error compensation improve performance in real-world applications?

Active error compensation combines spinning Hall technology and chopper stabilization to cancel offset voltage drift caused by temperature gradients and mechanical stress. This maintains BOP variation within ±0.5 mT across -40°C to +125°C - enabling consistent switch timing in laptops exposed to ambient swings or appliances operating near heat sources.