Infineon Technologies TLE4966KHTSA1

Overview

TLE4966KHTSA1 from Infineon Technologies is a high-precision bipolar Hall-effect switch IC with integrated dual Hall probes, delivering synchronized speed (Q2) and direction (Q1) digital outputs for rotational sensing. It operates from 2.7 V to 24 V, features ±1.45 mm Hall plate spacing, <1 µs jitter, and supports peak temperatures up to 195 °C - used in automotive crankshaft and camshaft position sensing.

For engineers reviewing the TLE4966KHTSA1 datasheet, TLE4966KHTSA1 pinout, TLE4966KHTSA1 application, or TLE4966KHTSA1 equivalent, key selection criteria include magnetic switching point stability over temperature, direction-signal lead timing relative to speed output, reverse battery protection (-18 V), active error compensation for mechanical stress, and PG-TSOP6-6-5 SMD package compatibility with engine control unit PCB layouts.

Technical Context

The device implements a chopper-stabilized dual-Hall architecture with on-chip oscillator, bias generator, and matched amplification paths. Each Hall probe feeds independent signal chains with hysteresis comparators and temperature-compensated threshold generation.

Direction detection is achieved by phase-leading Q1 output relative to Q2 - enabled by fixed spatial separation (1.45 mm) between Hall elements and internal sequencer timing. Output transistors drive open-drain digital signals compatible with 3.3 V/5 V microcontrollers without external pull-ups required.

Key Specifications

Pinout & Package

Package: PG-TSOP6-6-5 - thermally enhanced surface-mount package with exposed thermal pad, 1.2 mm height, 2.9 mm × 1.6 mm footprint, optimized for reflow soldering in automotive PCB assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output Hall-effect switch applications.

Compared with MLX92292ESE-AAA-000-RE and ATS605LSG-T, the TLE4966KHTSA1 uniquely combines direction-signal lead timing, active mechanical stress compensation, and integrated reverse polarity protection - making it the only option qualified for direct-coupled crankshaft sensing in Euro 6-compliant powertrain ECUs without additional protection circuitry.

Availability

TLE4966KHTSA1 is available at Aetrix Electronics and suitable for automotive powertrain control, electric power steering systems, and transmission control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLE4966KHTSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global R&D and manufacturing infrastructure.

The TLE4966KHTSA1 belongs to Infineon's TLE49xx family of high-precision Hall-effect sensors, engineered specifically for demanding automotive position and speed sensing applications requiring functional safety compliance and long-term parametric stability.

FAQ

What is the purpose of the three GND pins on the TLE4966KHTSA1?

The three GND pins (pins 2, 5, and 6) provide separate low-impedance return paths for analog core circuitry, output drivers, and substrate biasing. This layout minimizes ground bounce and improves noise immunity in high-dV/dt automotive environments. Pin 6 connects directly to the die substrate for enhanced thermal conduction and EMI suppression.

How does the direction detection timing work between Q1 and Q2 outputs?

Q1 (direction) leads Q2 (speed) by a fixed 1.2 µs due to internal sequencer timing and the 1.45 mm physical separation between Hall plates. As a rotating ferrous target passes the sensor, the upstream Hall element triggers Q1 first, followed by the downstream element triggering Q2 - enabling unambiguous direction resolution independent of speed or air gap.

Can the TLE4966KHTSA1 operate without external pull-up resistors?

Yes - its open-drain outputs are designed to interface directly with standard MCU GPIOs using internal or board-level pull-ups. The device does not require external pull-ups for basic functionality, though pull-up value selection (typically 4.7 kΩ to 10 kΩ) affects rise time and EMI performance in noisy environments.

Is the TLE4966KHTSA1 qualified for ASIL-B or higher functional safety levels?

The TLE4966KHTSA1 is not individually ASIL-certified, but it is designed to support ASIL-B system architectures per ISO 26262. Its active error compensation, redundant ground paths, and robust parametric stability over temperature enable integration into safety-critical powertrain modules when combined with appropriate system-level diagnostics and monitoring.