A1184LLHLT-T Equivalent & Substitute Parts

Part Overview

The A1184LLHLT-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, programmable trip point functionality, and operates across a wide supply voltage range of 4.6V to 24V. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

A1184LLHLT-T

Allegro MicroSystemsIn Stock: 848A1184LLHLT-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

Substitution of the A1184LLHLT-T is determined by strict alignment of the following critical parameters:

Core Functional Requirements:

• Technology: Hall Effect magnetic sensing
• Function: Unipolar Switch operation
• Polarization: South Pole detection
• Output Type: Open Collector configuration

Electrical Compatibility:

• Supply voltage range must encompass or overlap with 4.6V ~ 24V
• Maximum supply current must not exceed 17mA
• Operating temperature range must cover -40°C ~ 150°C

Mechanical & Packaging Compatibility:

• Mounting Type: Surface Mount
• Package compatibility: SOT-23W or equivalent footprint (TO-236-3, SC-59)

Quality & Compliance:

• Automotive Grade classification
• AEC-Q100 qualification
• ROHS3 compliance
• MSL rating of 1 (Unlimited)

The identified substitute parts TLE49761KHTSA1 and TLE49762KHTSA1 meet all specified criteria and maintain functional equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

TLE49762KHTSA1 (Infineon Technologies) is the primary substitute for the A1184LLHLT-T. This component maintains full electrical and mechanical compatibility with identical supply current specifications (17mA maximum), matching operating temperature range (-40°C ~ 150°C), and equivalent automotive-grade qualification (AEC-Q100). The supply voltage range of 3V ~ 18V encompasses the lower operating threshold of the original part. Package compatibility is confirmed through TO-236-3 and SC-59 designations, which are functionally equivalent to SOT-23W. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory compliance.

TLE49761KHTSA1 (Ampleon USA Inc.) is identified as an alternative substitute. However, critical electrical and mechanical parameters are not specified in available documentation. This part should be selected only when TLE49762KHTSA1 is unavailable, and full datasheet verification is required prior to implementation.

Both substitute parts are active production components, eliminating the obsolescence risk associated with the original A1184LLHLT-T.

Frequently Asked Questions (FAQ)

Q: Can TLE49762KHTSA1 directly replace A1184LLHLT-T in existing designs?

A: Yes. Both components share identical supply current specifications (17mA), matching operating temperature ranges (-40°C ~ 150°C), equivalent automotive-grade qualification (AEC-Q100), and functionally compatible package designations (SOT-23W and SC-59 are equivalent). The supply voltage range of TLE49762KHTSA1 (3V ~ 18V) encompasses the operational requirements of the original part.

Q: What is the difference between SOT-23W and SC-59 packaging?

A: SOT-23W and SC-59 are equivalent surface mount package designations for three-terminal semiconductor devices. Both provide identical footprint compatibility and pin configurations suitable for direct PCB substitution.

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

A: TLE49761KHTSA1 is listed based on manufacturer cross-reference documentation. However, incomplete parameter specification in available data requires full datasheet review and validation before implementation in production designs.

Q: Are both substitute parts automotive-qualified?

A: TLE49762KHTSA1 carries full automotive-grade classification with AEC-Q100 qualification. TLE49761KHTSA1 automotive qualification status is not specified in available documentation and must be verified through the manufacturer.

Q: What is the impact of the supply voltage range difference (4.6V ~ 24V vs. 3V ~ 18V)?

A: The TLE49762KHTSA1 supply voltage range of 3V ~ 18V is compatible with applications operating within this window. Applications requiring operation above 18V must retain the original A1184LLHLT-T or identify alternative components with extended voltage specifications.

Q: Are both substitute parts currently available?

A: Yes. Both TLE49761KHTSA1 and TLE49762KHTSA1 are classified as active production components, ensuring ongoing availability and eliminating obsolescence concerns associated with the A1184LLHLT-T.