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

Infineon Technologies TLE4976-1H

Name: TLE4976-1H
Brand: Infineon Technologies
SKU: TLE4976-1H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4976-1H

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TLE4976-1H.pdf

Description:: MAGNETIC SWITCH UNIPOLAR SC59

Quantity:: RFQ Add To RFQ list

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Inventory:2,247

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Product details

Overview

TLE4976-1H from Infineon Technologies is a high-precision unipolar Hall-effect switch with current-output interface (8/14 mA), operating from 3.0 V to 26 V supply, featuring ±8 kV HBM ESD protection, <1 µs jitter, and active error compensation for mechanical stress immunity. It is designed for automotive crankshaft/camshaft position sensing in engine control units under harsh thermal conditions up to 155°C junction temperature.

For engineers reviewing the TLE4976-1H datasheet, TLE4976-1H pinout, TLE4976-1H application, or TLE4976-1H equivalent, key selection criteria include magnetic sensitivity stability over temperature, reverse-battery tolerance (–18 V), SC59 package compatibility with SOT23 footprints, and current-mode output immunity to cable noise in automotive wiring harnesses.

Technical Context

The TLE4976-1H integrates a chopper-stabilized Hall probe with on-chip bias generator, oscillator, low-pass filter, hysteresis comparator, and reverse-polarity-protected voltage regulator. Its active error compensation circuit rejects offset drift induced by molding stress and thermal cycling.

Magnetic switching is unipolar (BOP = +3.5 mT typ., BRP = +1.5 mT typ.), with digital current modulation output (8 mA low / 14 mA high) referenced to VS, enabling robust transmission over long cables without additional signal conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.0 V to 26 V - supports direct battery connection in 12 V/24 V automotive systems with reverse-battery protection down to –18 V.
Output Current	8 mA (low) / 14 mA (high) - current-source output provides inherent noise immunity and eliminates need for pull-up resistors in wiring harnesses.
Jitter	Typ. 1 µs - enables precise timing resolution for crankshaft position detection at engine speeds up to 10,000 RPM.
ESD Protection	±8 kV HBM - meets automotive component-level ESD requirements per ISO 10605 without external protection devices.
Operating Junction Temp.	–40°C to +155°C - qualified for under-hood engine compartment placement without derating.
Magnetic Switch Points	BOP = +3.5 mT, BRP = +1.5 mT (typ.) - tight hysteresis (2.0 mT) ensures reliable edge detection in presence of vibration-induced field fluctuations.

Pinout & Package

Package: SC59 (SOT23-compatible 3-pin surface-mount package, lead pitch 0.95 mm, body size 2.9 × 1.3 × 1.0 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 - VS	Supply input	Reverse-polarity protected power rail; accepts 3.0–26 V with internal clamp to –18 V.
2 - N.C.	No internal connection	Electrically isolated pad; no bonding wire attached - must be left floating or grounded per layout guidelines.
3 - GND	Reference return	Ground reference for Hall sensor core and output stage; requires low-inductance PCB connection for stable switching.

Key Features

Feature	Design Value
Active Error Compensation	Rejects mechanical stress-induced offset drift from soldering and thermal cycling, maintaining BOP/BRP stability across 10-year vehicle life.
Chopper-Stabilized Architecture	Eliminates 1/f noise and zero-point drift, achieving <0.5% magnetic threshold variation over –40°C to +150°C.
Current-Mode Output	8/14 mA sourcing output referenced to VS enables >10 m cable drive capability without signal degradation in noisy engine bays.
High-Temp Robustness	Rated for continuous operation at TJ = 155°C and peak exposure to 195°C (3×1 h), supporting placement near exhaust manifolds.

Applications

Crankshaft Position Sensing

Camshaft Position Sensing

Use Scenario: Detecting toothed wheel rotation on engine crankshaft for ignition timing and fuel injection synchronization.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing edge-triggered current pulses synchronized to crankshaft angular position.

Use Value: Sub-microsecond jitter and thermal-stable switching points ensure ±0.5° crank angle accuracy at 6000 RPM under full-load thermal soak.

Use Scenario: Monitoring camshaft phasing for variable valve timing (VVT) actuator feedback in gasoline direct injection engines.

IC Role / Device Role / Timing Role: Magnetic threshold detector generating phase-aligned current pulses indicating cam lobe passage.

Use Value: Active error compensation maintains cam phase detection accuracy despite cylinder head thermal expansion-induced air gap changes.

Transmission Speed Sensing

ABS Wheel Speed Sensing

Use Scenario: Measuring gear rotation speed in automatic transmission valve body assemblies for shift control logic.

IC Role / Device Role / Timing Role: High-immunity current-output switch detecting ferrous gear teeth in oil-contaminated environments.

Use Value: Reverse-battery protection and 26 V max rating allow direct connection to transmission control module power rails without external regulators.

Use Scenario: Detecting wheel rotation via tone ring for anti-lock braking system (ABS) controller input.

IC Role / Device Role / Timing Role: Unipolar magnetic switch delivering noise-resistant current pulses over long chassis harnesses.

Use Value: 8/14 mA current output eliminates susceptibility to ground loop noise and EMI in 2+ meter cable runs from wheel hub to ABS ECU.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Melexis US1881	Open-drain voltage output (not current-mode); 2.7–24 V supply; ±4 kV ESD; BOP = +3.0 mT.	Lacks current-output noise immunity; requires external pull-up and filtering for long-cable ABS use.	Select when cost-sensitive designs accept added external components and reduced EMC robustness.
NXP TLE4927C	Voltage-output (push-pull); 4.5–24 V; ±8 kV ESD; includes integrated diagnostics and wake-up logic.	Higher integration adds complexity; not pin-compatible; lacks reverse-battery protection below –12 V.	Prefer for next-gen ECUs requiring embedded diagnostics and LIN-compliant wake-up, accepting higher BOM cost.

Compared with US1881 and TLE4927C, the TLE4976-1H uniquely combines current-mode output, –18 V reverse-battery tolerance, and active stress compensation - making it optimal for legacy and cost-constrained automotive powertrain sensors where wiring harness noise and thermal reliability are primary constraints.

Availability

TLE4976-1H is available at Aetrix Electronics and suitable for crankshaft position sensing, camshaft position sensing, transmission speed monitoring, and ABS wheel speed detection requiring stable component supply across extended automotive production lifecycles.

Supply support for TLE4976-1H 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 TLE4976-1H belongs to Infineon's high-precision Hall-effect sensor product line, engineered specifically for demanding automotive powertrain and chassis applications requiring magnetic accuracy, thermal resilience, and system-level EMC robustness.

FAQ

What is the function of Pin 2 (N.C.) on the TLE4976-1H?

Pin 2 is electrically unconnected - no internal bond wire or silicon node is attached. It must remain unconnected in PCB layout; grounding or routing to other nets may cause parasitic coupling or thermal imbalance affecting magnetic sensitivity calibration.

Does the TLE4976-1H require an external pull-up resistor?

No. The device uses a current-source output (8/14 mA) referenced to VS, eliminating the need for external pull-up resistors. Load impedance is placed between output (GND-referenced) and VS, forming a current loop compatible with standard current-input receivers.

Can the TLE4976-1H operate with a 5 V microcontroller supply?

Yes - its 3.0 V minimum supply allows direct interface with 5 V systems. However, VS must be connected to the main battery rail (not regulated 5 V), because the output current level (8/14 mA) is referenced to VS, and reverse-battery protection only functions when VS is tied to the vehicle battery.

Is the TLE4976-1H qualified to AEC-Q100?

Yes - the TLE4976-1H is AEC-Q100 qualified (Grade 0: –40°C to +150°C), with full qualification test reports available from Infineon. Its 155°C continuous operating junction temperature and 195°C short-term peak rating meet Grade 0 thermal requirements for engine compartment placement.

TLE4976-1H Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: TLE

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Unipolar Switch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 11mT Trip, 5mT Release

Test Condition:: -40°C ~ 150°C

Voltage - Supply:: 3V ~ 18V

Current - Supply (Max):: 17mA

Current - Output (Max):: -

Output Type:: Open Collector

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC59-3

TLE4976-1H FAQ

1.How can I place an order for TLE4976-1H through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4976-1H 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 TLE4976-1H reliable?

The price and inventory of TLE4976-1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4976-1H is usually 5 days.

3.What payment methods are accepted for TLE4976-1H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4976-1H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4976-1H?

TLE4976-1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4976-1H 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 TLE4976-1H?

For technical support, including TLE4976-1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4976-1H requirements.

6.How does Aetrix verify that TLE4976-1H is sourced from the original manufacturer or authorized distributors?

All TLE4976-1H 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 TLE4976-1H meets industry standards.

7.What is the process for return or replacement of TLE4976-1H?

All TLE4976-1H units undergo pre-shipment inspection (PSI). If there is an issue with TLE4976-1H, 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 TLE4976-1H part is unused and in its original packaging.

Return procedure for TLE4976-1H:

1.Submit a request within 90 days.

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

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