Infineon Technologies TLE4999I3XALA1

Overview

TLE4999I3XALA1 from Infineon Technologies is a dual-channel linear Hall sensor IC with integrated PSI5 v2.1 interface, ASIL D functional safety compliance per ISO 26262, 13-bit digital output with CRC and rolling counters, ±25 mT magnetic measurement range, and -40°C to 150°C operating junction temperature. It serves as a redundant torque or pedal position sensing element in automotive steering and throttle modules.

For engineers reviewing the TLE4999I3XALA1 datasheet, TLE4999I3XALA1 pinout, TLE4999I3XALA1 application, or TLE4999I3XALA1 equivalent, key selection criteria include PSI5 synchronous protocol support, independent EEPROM programming of main/sub channels, digital temperature/stress compensation, and PG-SSO-3-12 package compatibility with PCB-less module mounting.

Technical Context

The TLE4999I3XALA1 integrates two physically separate Hall sensing elements (main and sub), each with dedicated analog regulators, bias units, and temperature/stress sensing paths. Its dual DSP architecture (DSP1 for main channel, DSP2 for sub channel) applies stored EEPROM compensation parameters to correct for thermal and mechanical drift in real time.

It transmits Manchester-encoded current-modulated data via the PSI5 pin using synchronous mode with external sync pulse triggering, supporting P10P-400/4H high-speed protocol. Configuration occurs post-assembly via the 2-wire SICI interface on the PDL line, enabling end-of-line calibration without disassembly.

Key Specifications

Pinout & Package

Package: PG-SSO-3-12 - 3-pin leaded surface-mount package optimized for direct soldering into PCB-less sensor modules, with exposed die pad for thermal conduction and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel Hall sensor applications.

Compared with TLE4999I3XALA1, the TLE4998C3XUMA1 sacrifices safety certification and redundancy for lower BOM cost, while the MLX90393ELW-ABA-000-RE trades PSI5-native integration for higher resolution and axis flexibility-neither offers drop-in replacement capability due to interface, safety, or packaging mismatches.

Availability

TLE4999I3XALA1 is available at Aetrix Electronics and suitable for automotive steering systems, brake-by-wire modules, and industrial actuator feedback circuits requiring stable component supply, long-lifecycle support, and AEC-Q100 qualification.

Supply support for TLE4999I3XALA1 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 global R&D and manufacturing infrastructure.

The TLE4999I3XALA1 belongs to Infineon's PRO-SIL™ functional safety sensor portfolio, designed specifically for ASIL D-compliant torque, pedal, and throttle sensing in next-generation x-by-wire vehicle architectures.

FAQ

What is the role of the CBUF pin and what capacitor value is required?

The CBUF pin connects an external 6.8 nF ceramic capacitor to stabilize the internal analog voltage regulator that powers the Hall sensing elements and signal chain. This capacitor must be placed within 2 mm of the pin with minimal trace inductance to prevent oscillation and ensure accurate temperature-compensated output. Deviation from this value degrades noise immunity and measurement stability across temperature.

How does the TLE4999I3XALA1 achieve ASIL D compliance?

ASIL D compliance is achieved through hardware-level redundancy (independent main/sub Hall channels with separate analog domains), real-time plausibility checking between channels, CRC-protected 13-bit outputs, rolling counters to detect message replay, and comprehensive failure modes analysis documented in Infineon's Safety Manual. The device itself is certified to ISO 26262 Part 5, enabling its use in safety mechanisms up to ASIL D when integrated per the safety concept.

Can the PSI5 interface operate without an external synchronization pulse?

No. The PSI5 interface operates exclusively in synchronous mode and requires an external sync pulse applied to the PSI5 pin to trigger data transmission. The device does not support asynchronous or free-running PSI5 operation. The sync pulse must meet PSI5 v2.1 timing specifications (e.g., minimum width, rise/fall times) to ensure reliable frame alignment and avoid data corruption.

Is the TLE4999I3XALA1 compatible with standard PSI5 transceivers?

Yes - it is fully compliant with PSI5 v2.1 specification and interoperates with industry-standard PSI5 transceivers such as the TLE6240GS and NXP UJA1075. It uses the P10P-400/4H protocol variant and supports bidirectional communication for configuration via SICI, provided the transceiver implements the required Manchester encoding/decoding and current modulation timing.