Infineon Technologies TLE5045ICR050HALA1

Overview

TLE5045ICR050HALA1 from Infineon is a two-wire GMR-based wheel speed sensor optimized for R_m ≤ 50 Ω load, delivering ±0.02% period jitter, 7 mA / 14 mA current-output speed signaling, and ASIL B(D) compliance for automotive chassis control systems. It operates from −40 °C to +190 °C junction temperature and enables indirect tire pressure monitoring (iTPMS) via high-accuracy rotational timing.

For engineers reviewing the TLE5045ICR050HALA1 datasheet, TLE5045ICR050HALA1 pinout, TLE5045ICR050HALA1 application, or TLE5045ICR050HALA1 equivalent, key selection criteria include differential magnetic field immunity (±2 mT), air-gap robustness, micro-break supply-line disturbance rejection, and integrated ESD protection (±12 kV HBM).

Technical Context

The TLE5045ICR050HALA1 implements a differential GMR sensing element sensitive to x-axis magnetic flux, with adaptive hysteresis and zero-crossing detection logic to generate precise speed pulses from sinusoidal encoder fields. Its internal offset compensation and dynamic thresholding ensure stable operation across air-gap variations and y-displacement.

It features undervoltage detection, fuse integrity checking, and failure-state current output (I_Error = 1–3.8 mA) to support ISO 26262 safety mechanisms. The micro-break feature suppresses supply-line transients without external components, and its EMC design meets ISO 7637-2/3 and CISPR 25 Class 5 requirements.

Key Specifications

Pinout & Package

Package: PG-SSO-2 (5 mm × 3 mm, 2-pin leadless SOIC), optimized for mechanical stress resilience and compact module integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wheel speed sensing applications.

Compared with TLE5045ICR050HALA1, the TLE5046ICR050HALA1 adds direction sensing at the cost of extra pin and routing complexity, while the ATS6858LSGT-T trades ASIL compliance and jitter performance for Hall-based simplicity in less demanding applications.

Availability

TLE5045ICR050HALA1 is available at Aetrix Electronics and suitable for ABS/ESC systems, iTPMS modules, electric power steering units, and ADAS sensor fusion platforms requiring stable component supply across automotive production lifecycles.

Supply support for TLE5045ICR050HALA1 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 automotive, power management, and sensor solutions, with global manufacturing and qualification aligned to AEC-Q100 and ISO/TS 16949 standards.

The TLE5045iC product line delivers high-end GMR wheel speed sensors engineered for ASIL B(D) chassis control applications, emphasizing jitter-limited timing accuracy, extreme temperature resilience, and integrated EMC robustness.

FAQ

What is the maximum allowable air gap for reliable operation?

The TLE5045ICR050HALA1 maintains valid signal detection up to 2.5 mm air gap with standard 2-pole encoder wheels, enabled by its high GMR sensitivity (>90 µT at 25 °C) and differential architecture that rejects y-axis displacement effects. Performance validation requires encoder magnet grade N42 or higher and proper mechanical alignment per Infineon's mounting guidelines.

Does this sensor require an external capacitor for stability?

No. The TLE5045ICR050HALA1 integrates all necessary filtering and regulation circuitry, eliminating the need for external capacitors - a key design advantage confirmed in its 5×3 mm PG-SSO-2 package documentation. This reduces PCB area, improves mechanical robustness against vibration, and simplifies compliance with automotive EMC requirements.

How does the micro-break feature protect against supply transients?

The micro-break feature is an internal active clamp circuit that detects and suppresses fast-rising supply-line disturbances (e.g., load dump, relay bounce) by temporarily decoupling internal bias networks. It operates autonomously without firmware involvement and restores normal operation within microseconds, ensuring uninterrupted pulse output during transient events per ISO 7637-2 Pulse 1/2a/5a test profiles.

Can this part be used in ASIL D systems despite its ASIL B(D) rating?

Yes. The "B(D)" designation indicates the device satisfies ASIL B requirements and provides sufficient diagnostic coverage and fault handling to be integrated into ASIL D systems when combined with appropriate system-level redundancy and monitoring - as validated in Infineon's Safety Manual and supported by its dual-fuse integrity check and error-current signaling architecture.