A1142LUA-T Equivalent & Substitute Parts

Part Overview

The A1142LUA-T is a unipolar magnetic switch utilizing Hall Effect technology, designed for digital switching applications in automotive-grade environments. This component features an open collector output configuration with a sensing range of 11mT trip and 4.5mT release thresholds. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement continuity.

Substiute Parts

A1142LUA-T

Allegro MicroSystemsIn Stock: 1051A1142LUA-T Datasheet

Current PartRFQ

A1152LUA-T

Allegro MicroSystemsIn Stock: 11675A1152LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The A1152LUA-T serves as the manufacturer-recommended substitute for the obsolete A1142LUA-T. Substitution eligibility is determined by the following critical parameters:

• Identical Hall Effect technology and unipolar switch function
• Matching polarization (South Pole)
• Identical sensing range thresholds (11mT trip, 4.5mT release)
• Compatible operating temperature range (-40°C ~ 150°C)
• Identical mounting type (Through Hole) and package form factor (3-SSIP)
• Matching automotive grade and AEC-Q100 qualification
• Equivalent RoHS3 compliance status

The primary distinction between these components is the output configuration: the A1142LUA-T employs open collector output, while the A1152LUA-T utilizes current source output. Additionally, the A1152LUA-T demonstrates higher maximum supply current (17mA versus 6.9mA) and operates across a marginally wider supply voltage range (3V ~ 24V versus 4.6V ~ 24V).

Parameter Comparison

Engineering Selection Recommendations

The A1152LUA-T is the active production equivalent for the obsolete A1142LUA-T. Both components maintain identical sensing thresholds, operating temperature specifications, and automotive-grade AEC-Q100 qualification. The A1152LUA-T offers extended product lifecycle support with active inventory status and improved supply voltage floor (3V minimum versus 4.6V minimum).

Circuit design modifications are required to accommodate the output type transition from open collector to current source. The A1152LUA-T's higher maximum supply current (17mA) provides additional design margin in power-constrained applications. Both components satisfy ROHS3 compliance and REACH unaffected status for regulated markets.

Frequently Asked Questions (FAQ)

Q: Can the A1152LUA-T directly replace the A1142LUA-T without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to output type differences. The A1142LUA-T provides open collector output, while the A1152LUA-T provides current source output. Circuit interface design must be adapted accordingly.

Q: Are the sensing thresholds identical between these components?

A: Yes. Both the A1142LUA-T and A1152LUA-T maintain identical trip threshold (11mT) and release threshold (4.5mT) specifications.

Q: What is the impact of the supply voltage range difference?

A: The A1152LUA-T operates from 3V minimum supply, compared to 4.6V for the A1142LUA-T. This provides 0.5V additional design margin in low-voltage applications. Both components support the full 24V upper limit.

Q: Are both components suitable for automotive applications?

A: Yes. Both the A1142LUA-T and A1152LUA-T carry automotive grade classification and AEC-Q100 qualification, meeting automotive industry reliability standards.

Q: Is the 3-SSIP package identical for both components?

A: Yes. Both components utilize the identical 3-SSIP through-hole package form factor, ensuring mechanical compatibility in PCB layouts.

Q: What compliance certifications apply to both components?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for restricted substances and chemical safety.