A1184LLHLT Equivalent & Substitute Parts

Part Overview

The A1184LLHLT is a unipolar Hall Effect magnetic switch manufactured by Allegro MicroSystems, designed for automotive-grade applications with open collector output and programmable trip point functionality. This component operates across a supply voltage range of 4.6V to 24V with a maximum supply current of 17mA and is qualified to AEC-Q100 standards for automotive use. The product is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations where this functionality is required.

Substiute Parts

A1184LLHLT

Allegro MicroSystemsIn Stock: 758A1184LLHLT 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 A1184LLHLT are selected based on strict alignment with the following critical parameters:

Core Functional Requirements:

• Hall Effect technology with unipolar switch operation
• South pole magnetic polarization detection
• Open collector output configuration
• Automotive-grade classification with AEC-Q100 qualification

Electrical Compatibility:

• Supply voltage range overlap (minimum 4.6V to 24V operation or compatible subset)
• Maximum supply current of 17mA or lower
• Operating temperature range of -40°C to 150°C or compatible subset

Physical & Packaging Compatibility:

• Surface mount technology
• Package form factor compatible with SOT-23W footprint requirements

The identified substitute parts TLE49761KHTSA1 and TLE49762KHTSA1 meet these criteria with active product status, ensuring long-term availability and support.

Parameter Comparison

Engineering Selection Recommendations

TLE49762KHTSA1 (Infineon Technologies) is the primary substitute for the A1184LLHLT. This part maintains active product status, carries AEC-Q100 automotive qualification, and provides full electrical parameter alignment including identical supply current specifications (17mA maximum) and operating temperature range (-40°C to 150°C). The supply voltage range of 3V to 18V is compatible with the original part's 4.6V to 24V specification for most automotive applications. The package form factor (TO-236-3, SC-59, SOT-23-3) is footprint-compatible with SOT-23W requirements. ROHS3 compliance provides regulatory advantage for new designs.

TLE49761KHTSA1 (Ampleon USA Inc.) is listed as an alternative substitute with active product status. However, critical electrical and physical parameters are not specified in available documentation, limiting direct compatibility verification. This part should be selected only when TLE49762KHTSA1 is unavailable and detailed datasheet review confirms parameter alignment.

Frequently Asked Questions (FAQ)

Q: Can TLE49762KHTSA1 directly replace A1184LLHLT in existing designs?

A: TLE49762KHTSA1 provides functional and electrical compatibility for most automotive applications. The supply voltage range (3V to 18V) covers the typical operating window of the original part. Verify that your specific application does not require operation above 18V. Package footprint compatibility (SOT-23-3 to SOT-23W) must be confirmed for your PCB layout.

Q: What is the difference between the two substitute parts?

A: TLE49762KHTSA1 (Infineon) provides complete parameter documentation with confirmed AEC-Q100 qualification and ROHS3 compliance. TLE49761KHTSA1 (Ampleon) has limited parameter specification in available data. TLE49762KHTSA1 is the recommended choice for new designs and critical applications.

Q: Are there package compatibility concerns?

A: The original A1184LLHLT uses SOT-23W packaging. TLE49762KHTSA1 is available in TO-236-3, SC-59, and SOT-23-3 packages. Verify that your PCB footprint accommodates the selected package variant. SOT-23-3 and SC-59 are functionally equivalent three-pin configurations suitable for Hall Effect switch applications.

Q: Does the lower maximum supply voltage of TLE49762KHTSA1 affect compatibility?

A: TLE49762KHTSA1 operates from 3V to 18V, compared to the original 4.6V to 24V range. For automotive applications operating within 18V, this presents no limitation. Applications requiring operation above 18V require alternative evaluation or circuit redesign.

Q: What compliance advantages does TLE49762KHTSA1 provide?

A: TLE49762KHTSA1 is ROHS3 compliant, whereas the original A1184LLHLT is RoHS non-compliant. This provides regulatory advantage for new product designs and markets with RoHS requirements. Both parts maintain AEC-Q100 automotive qualification.