Infineon Technologies TLE49641MXTMA1

Overview

TLE49641MXTMA1 from Infineon Technologies is a high-precision unipolar Hall effect switch optimized for automotive position sensing, featuring 3.0 V to 32 V supply operation, ±18 V reverse polarity protection, 42 V load-dump tolerance without external resistor, open-drain output, and -40°C to +170°C operating temperature range.

For engineers reviewing the TLE49641MXTMA1 datasheet, TLE49641MXTMA1 pinout, TLE49641MXTMA1 application, or TLE49641MXTMA1 equivalent, key selection criteria include magnetic threshold stability (BOP = 18 mT, BRP = 12.5 mT), low jitter (0.35 μs typ.), integrated overcurrent/overtemperature protection, and AEC-Q100 qualification for under-hood use.

Technical Context

The device implements a spinning-current Hall probe with chopper-stabilized amplification and active error compensation to suppress offset drift and mechanical stress effects from packaging and thermal cycling. Its comparator includes built-in hysteresis (BHYS = 5.5 mT) for noise immunity in electrically noisy environments.

Internal voltage regulation enables stable operation across wide input transients, while the open-drain output supports flexible pull-up configurations up to 42 V. The IC integrates protection logic that disables output during overtemperature or output short-circuit conditions, recovering automatically after fault clearance.

Key Specifications

Pinout & Package

Package: PG-SOT23-3-15 - compact surface-mount package with exposed thermal pad, optimized for high-temperature reflow and mechanical reliability in automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with US1881EUA-ABA-000-RE and A1120ELHLT-T, TLE49641MXTMA1 delivers superior transient resilience, extended temperature capability, and integrated protection - making it the only option qualified for direct engine bay mounting in modern ICE and hybrid powertrains.

Availability

TLE49641MXTMA1 is available at Aetrix Electronics and suitable for automotive engine management, transmission control, and brake-by-wire systems requiring stable component supply across extended temperature and voltage extremes.

Supply support for TLE49641MXTMA1 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, automotive ICs, and sensor solutions, with leadership in AEC-Q100-qualified components.

The TLE496x family targets high-reliability automotive position sensing, designed specifically to replace mechanical switches and lower-precision Hall sensors in safety-critical drivetrain and chassis applications.

FAQ

What is the maximum allowable supply voltage transient for TLE49641MXTMA1?

The device withstands 42 V supply transients without external components, complying with ISO 7637-2 Pulse 5a (load dump) requirements for 12 V and 24 V automotive systems. This eliminates the need for external TVS diodes in most implementations, reducing BOM count and board space.

Does TLE49641MXTMA1 require an external pull-up resistor on the output?

Yes - the open-drain Q pin requires an external pull-up resistor to define the high-state voltage level. Pull-up values from 1 kΩ to 10 kΩ are typical; the device supports pull-up voltages up to 42 V, enabling direct interface with higher-voltage subsystems without level-shifting circuitry.

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

Chopper stabilization cancels offset voltage drift caused by thermal gradients across the die and mechanical stress from solder reflow or engine vibration. This maintains BOP/BRP accuracy within ±1.5 mT over -40°C to +170°C - critical for repeatable cam/crank timing in variable thermal conditions.

Is TLE49641MXTMA1 compatible with lead-free reflow profiles?

Yes - the PG-SOT23-3-15 package is qualified for standard lead-free reflow processes (JEDEC J-STD-020), including peak temperatures up to 260°C. The exposed thermal pad enhances thermal transfer during soldering and improves long-term reliability under thermal cycling.