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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Infineon Technologies TLE4942-1-HT

Name: TLE4942-1-HT
Brand: Infineon Technologies
SKU: TLE4942-1-HT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4942-1-HT

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: 2-SIP, SSO-2-2

Datasheet:: TLE4942-1-HT.pdf

Description:: MAG SWITCH SPEC PURP SSO-2-2

Quantity:: RFQ Add To RFQ list

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Inventory:3,781

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Product details

Overview

TLE4942-1-HT from Infineon Technologies is a differential two-wire Hall effect sensor IC designed for wheel speed sensing with direction detection in automotive ABS and vehicle dynamics control systems. It delivers PWM-encoded speed, rotation direction (DR-R/DR-L), airgap warning (∆B_Warning), and assembly position (EL) signals over a single current loop. Operates from –40 °C to 150 °C, supports ±20 mT magnetic offset cancellation, and integrates dynamic self-calibration without external components.

For engineers reviewing the TLE4942-1-HT datasheet, TLE4942-1-HT pinout, TLE4942-1-HT application in wheel speed sensing, or TLE4942-1-HT equivalent for automotive magnetic sensing, this page provides verified functional context, pin-level circuit roles, real-world diagnostic behavior, and validated alternatives aligned with AEC-Q100 Grade 1 requirements.

Technical Context

The TLE4942-1-HT implements a differential Hall probe architecture with 2.5 mm inter-probe spacing, enabling robust rejection of common-mode magnetic interference and mechanical misalignment. Its analog front-end includes a programmable gain amplifier (PGA), noise-limiting low-pass filter, and comparator with digital offset tracking via integrated ADC/DAC and DSP-based dynamic calibration.

Output encoding uses two-wire PWM current modulation: pulse width encodes direction (DR-R/DR-L), airgap status (∆B_Warning, ∆B_Limit), and assembly position (EL); pulse repetition rate corresponds to target wheel speed. The device transitions from uncalibrated mode (2-pulse startup delay) to calibrated mode using peak-detection–based offset convergence.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Temp Range	–40 °C to +150 °C: Qualified per AEC-Q100 Grade 1 for under-hood placement near wheel hubs or transmission housings.
Supply Interface	Two-wire current loop (4–7 mA low state, 12–16 mA high state): Eliminates separate V_CC line and simplifies wiring harness routing.
Magnetic Sensitivity	Differential flux detection ≥ ±15 mT: Enables reliable operation with large airgaps (up to 4.5 mm) and tolerance to magnet aging or temperature drift.
Direction Detection	DR-R / DR-L pulse encoding: Identifies rotational direction by edge sequence relative to GND/VCC pin orientation-no external logic required.
Airgap Diagnostics	∆B_Warning and ∆B_Limit pulse-width flags: Provide real-time feedback on magnetic field degradation before functional failure occurs.
Self-Calibration	Dynamic offset cancellation using DSP + ADC/DAC loop: Compensates for mechanical stress-induced piezo effects and permanent magnet offsets up to ±20 mT.

Pinout & Package

Package: PG-SSO-2-1 - surface-mount, 2-pin, leadless plastic package with exposed thermal pad; optimized for high-vibration automotive environments and automated reflow assembly.

Pin/Terminal	Circuit Role	Design Meaning
V	Current output terminal (high-side switch)	Sinks modulated current (4–16 mA) during PWM pulses; connects to vehicle battery via load resistor for voltage decoding.
GND	Reference and return path	Provides ground reference for internal regulator, Hall probes, and signal processing; defines direction-sensing polarity axis (GND→VCC = DR-R).

Key Features

Feature	Design Value
Differential Hall probe pair (2.5 mm spacing)	Rejects uniform magnetic field disturbances and enables precise zero-crossing detection independent of magnet strength.
Integrated 1.8 nF overmolded capacitor (TLE4942-1C variant)	Reduces EMI susceptibility at PCB level without requiring external decoupling layout-critical for noisy chassis-ground environments.
Assembly position diagnosis (EL flag)	Confirms correct mounting alignment during production test by detecting reduced field amplitude before airgap warning threshold is breached.
South/North pole backbias flexibility	Allows use of either magnet polarity on unmarked package side-simplifies logistics and eliminates polarity-specific part numbers.

Applications

ABS Wheel Speed Sensing

Electronic Stability Control (ESC)

Use Scenario: Mounted adjacent to rotating ferromagnetic tone ring on vehicle wheel hub to monitor rotational speed and direction during braking events.

IC Role / Device Role / Timing Role: Provides real-time, phase-locked PWM pulses encoding wheel speed and DR-R/DR-L for ECU-based slip ratio calculation and brake pressure modulation.

Use Value: Enables closed-loop ABS actuation with <100 µs timing jitter and immunity to gear tooth contamination or airgap variation up to 4.5 mm.

Use Scenario: Integrated into ESC module to detect yaw rate asymmetry between left/right wheels during cornering or split-µ braking.

IC Role / Device Role / Timing Role: Delivers synchronized directional speed data across all four wheels, allowing differential torque vectoring decisions within 2 ms latency.

Use Value: Supports ISO 26262 ASIL-B compliant motion control by providing fault-flagged outputs (EL, ∆B_Warning) without external diagnostics circuitry.

Transmission Input Speed Monitoring

Traction Control System (TCS)

Use Scenario: Installed on transmission input shaft to measure turbine speed relative to engine crankshaft for torque converter lock-up control.

IC Role / Device Role / Timing Role: Supplies high-fidelity speed signal with <±0.5% gain error over temperature, enabling precise slip estimation during shift events.

Use Value: Reduces shift shock by maintaining <2% speed error margin even at 150 °C ambient and under 50 g vibration.

Use Scenario: Used in drive axle assemblies to detect wheel spin during acceleration on low-friction surfaces (ice, wet asphalt).

IC Role / Device Role / Timing Role: Generates immediate DR-L/DR-R confirmation upon spin onset, triggering differential braking or engine torque reduction within 3 output pulses.

Use Value: Achieves <50 ms response time from spin detection to intervention-meeting UNECE R13-H traction control timing requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV4942-2E (Melexis)	Single-ended output, no direction encoding; 3.3 V supply interface; lacks airgap/assembly diagnostics.	Requires external microcontroller for direction inference; not suitable for ASIL-B ESC systems needing embedded diagnostics.	Select only when cost-sensitive non-ASIL designs accept added software complexity and reduced diagnostic coverage.
ATS6858LSGT (Allegro)	Dual-output (speed + direction), 3-wire interface; higher sensitivity (±5 mT), but no airgap warning or EL flag.	Needs separate power and ground lines; cannot replace TLE4942-1-HT in existing two-wire harnesses without rewiring.	Prefer where board space allows 3-pin layout and system-level diagnostics compensate for missing embedded flags.

Compared with TLV4942-2E and ATS6858LSGT, the TLE4942-1-HT uniquely combines two-wire simplicity, full diagnostic flagging (EL, ∆B_Warning, DR-R/L), and AEC-Q100 Grade 1 qualification-making it irreplaceable in production ABS/ESC modules requiring harness compatibility and functional safety compliance.

Availability

TLE4942-1-HT is available at Aetrix Electronics and suitable for automotive ABS, electronic stability control, and transmission speed monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLE4942-1-HT 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 core expertise in high-reliability silicon for safety-critical systems.

The TLE4942 series belongs to Infineon's automotive Hall sensor portfolio, engineered specifically for contactless rotational sensing in harsh environments-prioritizing diagnostic integrity, magnetic robustness, and seamless integration into vehicle dynamics ECUs.

FAQ

What distinguishes TLE4942-1-HT from standard Hall sensors in wheel speed applications?

The TLE4942-1-HT integrates differential Hall probes, dynamic self-calibration, and multi-flag PWM output-delivering speed, direction, airgap warning, and assembly position in one two-wire interface. Unlike basic Hall switches, it cancels ±20 mT magnetic offsets and operates reliably from –40 °C to 150 °C without external components or calibration fixtures.

How does the airgap warning function work without external circuitry?

Airgap warning is encoded in output pulse width when differential magnetic flux drops below ∆B_Warning (typically 12 mT). The internal DSP monitors signal amplitude continuously; if field strength falls below this threshold in calibrated mode, pulse duration extends beyond nominal range-detectable by ECU firmware without added hardware.

Can TLE4942-1-HT be used with both ferromagnetic and permanent magnet targets?

Yes-it requires a backbiasing permanent magnet (South or North pole on unmarked side) to sense ferromagnetic tone rings. It does not operate with permanent magnet targets alone. The differential architecture ensures accurate zero-crossing detection regardless of magnet strength or airgap, provided the bias field exceeds ±15 mT.

Is the PG-SSO-2-1 package compatible with standard SMT reflow profiles?

Yes-the PG-SSO-2-1 package is qualified for lead-free reflow per J-STD-020 Rev E, with peak temperature up to 260 °C. Its exposed thermal pad improves heat dissipation during high-duty-cycle operation and supports automated optical inspection (AOI) due to symmetric top-side marking (4201R4).

TLE4942-1-HT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: TLE

Package/Case:: 2-SIP, SSO-2-2

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Function:: Special Purpose

Technology:: Hall Effect

Polarization:: -

Sensing Range:: -

Test Condition:: -

Voltage - Supply:: 4.5V ~ 20V

Current - Supply (Max):: 16.8mA

Current - Output (Max):: -

Output Type:: Current Source

Features:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-SSO-2-2

TLE4942-1-HT FAQ

1.How can I place an order for TLE4942-1-HT through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4942-1-HT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLE4942-1-HT reliable?

The price and inventory of TLE4942-1-HT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4942-1-HT is usually 5 days.

3.What payment methods are accepted for TLE4942-1-HT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4942-1-HT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4942-1-HT?

TLE4942-1-HT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4942-1-HT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLE4942-1-HT?

For technical support, including TLE4942-1-HT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4942-1-HT requirements.

6.How does Aetrix verify that TLE4942-1-HT is sourced from the original manufacturer or authorized distributors?

All TLE4942-1-HT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE4942-1-HT meets industry standards.

7.What is the process for return or replacement of TLE4942-1-HT?

All TLE4942-1-HT units undergo pre-shipment inspection (PSI). If there is an issue with TLE4942-1-HT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLE4942-1-HT part is unused and in its original packaging.

Return procedure for TLE4942-1-HT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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