A1142LLHLT-T Equivalent & Substitute Parts

Part Overview

The A1142LLHLT-T is a unipolar Hall Effect magnetic switch manufactured by Allegro MicroSystems, designed for automotive-grade applications requiring digital switching based on magnetic field detection. This component features an open collector output and operates across a wide supply voltage range of 4.6V to 24V with a sensing range of 11mT trip and 4.5mT release thresholds.

The A1142LLHLT-T is classified as obsolete. Equivalent substitute parts are necessary to maintain design continuity and ensure availability for new production runs, repairs, and system upgrades where this sensor functionality is required.

Substiute Parts

A1142LLHLT-T

Allegro MicroSystemsIn Stock: 1143A1142LLHLT-T Datasheet

Current PartRFQ

TLE49761KHTSA1

Ampleon USA Inc.In Stock: 276546TLE49761KHTSA1 Datasheet

MFR RecommendedRFQ

TLE49762KHTSA1

Infineon TechnologiesIn Stock: 1100TLE49762KHTSA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A1142LLHLT-T are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Substitution Criteria:

• Function: Unipolar Switch
• Technology: Hall Effect
• Polarization: South Pole
• Output Type: Open Collector
• Operating Temperature Range: -40°C ~ 150°C minimum
• Grade: Automotive
• Qualification: AEC-Q100
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Acceptable Parameter Variations:

• Supply Voltage: Substitute parts may have different voltage ranges provided they encompass or are compatible with the application's operating voltage
• Current Supply (Max): Substitute parts may have higher maximum supply current ratings
• Package / Case: Different surface mount packages are acceptable if mechanical fit and PCB layout accommodate the alternative form factor

The identified substitute parts TLE49761KHTSA1 and TLE49762KHTSA1 meet these core criteria while maintaining automotive-grade qualification and AEC-Q100 compliance.

Parameter Comparison

Engineering Selection Recommendations

TLE49762KHTSA1 (Infineon Technologies) is the primary recommended substitute. This part maintains full alignment with the A1142LLHLT-T across all specified parameters: identical operating temperature range (-40°C ~ 150°C), automotive grade classification, AEC-Q100 qualification, ROHS3 compliance, and South Pole polarization. The package compatibility (TO-236-3, SC-59, SOT-23-3) accommodates SOT-23W footprints. The higher maximum supply current (17mA vs. 6.9mA) provides design margin. Product status is active, ensuring long-term availability.

TLE49761KHTSA1 (Ampleon USA Inc.) is an alternative substitute with active product status. However, critical parameters including operating temperature range, supply voltage specifications, current ratings, and automotive qualification are not provided in available documentation. This part should be selected only when TLE49762KHTSA1 is unavailable and after verification of compatibility with application requirements.

Frequently Asked Questions (FAQ)

Q: Can TLE49762KHTSA1 be used as a direct replacement for A1142LLHLT-T?

A: Yes. Both parts share identical core specifications: Hall Effect technology, South Pole polarization, open collector output, -40°C ~ 150°C operating temperature, automotive grade, and AEC-Q100 qualification. Package compatibility exists between SOT-23W and SC-59/SOT-23-3 form factors for surface mount applications.

Q: What is the difference in supply voltage between the main part and TLE49762KHTSA1?

A: The A1142LLHLT-T operates at 4.6V ~ 24V, while TLE49762KHTSA1 operates at 3V ~ 18V. Applications requiring supply voltages above 18V are not compatible with TLE49762KHTSA1. Verify your circuit's operating voltage before substitution.

Q: Why is TLE49761KHTSA1 listed as a substitute if key parameters are not specified?

A: TLE49761KHTSA1 is listed based on manufacturer documentation indicating it as an equivalent part. However, incomplete parameter data limits full compatibility verification. Consult the manufacturer's detailed datasheet and conduct application-specific testing before implementation.

Q: Are both substitute parts RoHS compliant?

A: TLE49762KHTSA1 is confirmed ROHS3 compliant. TLE49761KHTSA1 compliance status is not specified in available documentation. Verify RoHS compliance with the supplier if regulatory requirements mandate it.

Q: What are the package considerations when substituting these parts?

A: The A1142LLHLT-T uses SOT-23W packaging. TLE49762KHTSA1 is available in TO-236-3, SC-59, and SOT-23-3 packages. Confirm PCB footprint compatibility and land pattern alignment before design implementation. TLE49761KHTSA1 package specifications are not provided.

Q: Is AEC-Q100 qualification maintained with substitute parts?

A: TLE49762KHTSA1 maintains AEC-Q100 qualification, suitable for automotive applications. TLE49761KHTSA1 qualification status is not specified. For automotive-grade applications, TLE49762KHTSA1 is the recommended choice.