A3280LLTTR Equivalent & Substitute Parts

Part Overview

The A3280LLTTR is a digital switch latch Hall Effect magnetic sensor manufactured by Allegro MicroSystems in SOT-89-3 surface mount packaging. This component functions as an open collector output magnetic switch with latch functionality, designed for applications requiring magnetic field detection and switching control. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

A3280LLTTR

Allegro MicroSystemsIn Stock: 4835A3280LLTTR Datasheet

Current PartRFQ

SS561AT

Honeywell Sensing and Productivity SolutionsIn Stock: 3054SS561AT Datasheet

MFR RecommendedRFQ

SS566AT

Honeywell Sensing and Productivity SolutionsIn Stock: 5296SS566AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the A3280LLTTR are identified based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Technology: Hall Effect digital switch latch
• Output Type: Open Collector
• Polarization: South Pole
• Mounting Type: Surface Mount
• Package / Case: TO-243AA or compatible variant
• Operating Temperature Range: -40°C ~ 150°C
• Voltage Supply Range: Minimum overlap with 4.2V ~ 24V
• Output Current Capacity: Minimum 25mA

Substitute Parts:

SS561AT (Honeywell Sensing and Productivity Solutions) meets all core compatibility criteria with enhanced specifications. This active product operates within a wider supply voltage range (3.8V ~ 30V), provides higher output current capacity (50mA), and includes temperature compensation. The sensing range of 8.5mT Trip, -8.5mT Release differs from the original but remains within acceptable substitution parameters for latch-type Hall Effect sensors.

SS566AT (Honeywell Sensing and Productivity Solutions) also meets all core compatibility criteria with similar enhanced specifications to SS561AT. This active product operates within the same supply voltage range (3.8V ~ 30V) and output current capacity (50mA) with temperature compensation. The sensing range of 18mT Trip, -18mT Release represents a higher threshold variant suitable for applications requiring different magnetic field sensitivity.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The A3280LLTTR is obsolete, necessitating substitution for new designs and ongoing system support. Both SS561AT and SS566AT are active products with established supply chains and continued manufacturer support.

Compliance and Certification: The A3280LLTTR is RoHS non-compliant. Both substitute parts (SS561AT and SS566AT) are RoHS Compliant, meeting modern regulatory requirements for electronic component procurement. Both substitutes maintain REACH Unaffected and EAR99 ECCN classifications consistent with the original part.

Substitute Selection Logic:

Select SS561AT for applications where the original A3280LLTTR sensing range of 4mT Trip, -8.5mT Release is functionally acceptable. This part provides the closest sensing threshold to the original component while offering enhanced specifications including temperature compensation and higher output current capacity.

Select SS566AT for applications requiring higher magnetic field threshold detection at 18mT Trip, -18mT Release. This variant is appropriate when system design accommodates the increased sensing range requirement.

Both substitutes provide superior electrical performance characteristics compared to the obsolete original part, including wider supply voltage range, higher output current capacity, and temperature compensation features.

Frequently Asked Questions (FAQ)

Q: Can SS561AT and SS566AT be used interchangeably with the A3280LLTTR?

A: Both parts are functionally compatible as open collector output Hall Effect latch sensors with South Pole polarization and identical operating temperature ranges. However, the sensing range differs between parts. SS561AT operates at 8.5mT Trip, -8.5mT Release, while SS566AT operates at 18mT Trip, -18mT Release, compared to the original 4mT Trip, -4mT Release. Application requirements determine which substitute is appropriate.

Q: Are the package dimensions identical between A3280LLTTR and the substitute parts?

A: All three parts use TO-243AA or TO-243AA Variant packaging for surface mount applications. Physical compatibility is maintained for PCB layout purposes.

Q: What is the advantage of the temperature compensation feature in SS561AT and SS566AT?

A: Temperature compensation in the substitute parts stabilizes sensor performance across the full operating temperature range of -40°C to 150°C. This feature enhances consistency and reliability compared to the original A3280LLTTR.

Q: Do the substitute parts meet modern regulatory requirements?

A: Yes. Both SS561AT and SS566AT are RoHS Compliant, addressing regulatory requirements for new designs and procurement. The original A3280LLTTR is RoHS non-compliant.

Q: What is the difference in output current capacity between the original and substitute parts?

A: The A3280LLTTR provides 25mA maximum output current. Both SS561AT and SS566AT provide 50mA maximum output current, offering greater drive capability for downstream circuitry.

Q: How do the supply voltage ranges compare?

A: The A3280LLTTR operates at 4.2V ~ 24V. Both substitute parts operate at 3.8V ~ 30V, providing a wider operating range that encompasses the original specification with additional headroom for system design flexibility.