A3283LLT Equivalent & Substitute Parts

Part Overview

The A3283LLT 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 south pole polarization, designed for applications requiring latching magnetic detection across industrial temperature ranges. The A3283LLT is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure long-term supply chain reliability.

Key Parameters

Parameter	A3283LLT
Manufacturer	Allegro MicroSystems
Category	Magnetic Sensors
Function	Latch
Technology	Hall Effect
Polarization	South Pole
Output Type	Open Collector
Mounting Type	Surface Mount
Package / Case	TO-243AA
Voltage - Supply	4.2V ~ 24V
Current - Supply (Max)	8mA
Current - Output (Max)	25mA
Operating Temperature	-40°C ~ 150°C (TA)
Sensing Range	18mT Trip, -18mT Release
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the A3283LLT is determined by the following critical parameters:

Function & Technology: Latch function with Hall Effect technology
Polarization: South pole detection capability
Output Configuration: Open collector output type
Mounting & Package: Surface mount with TO-243AA package compatibility
Operating Temperature Range: -40°C ~ 150°C
Supply Voltage Compatibility: Minimum 4.2V operation requirement
Output Current Capability: Minimum 25mA output current

The identified substitutes (SS561AT and SS566AT) are both manufactured by Honeywell Sensing and Productivity Solutions and maintain functional equivalence through matching latch function, Hall Effect technology, south pole polarization, open collector output, surface mount configuration, and operating temperature range. Both substitutes provide enhanced supply voltage range (3.8V ~ 30V) and superior output current capability (50mA), ensuring compatibility with A3283LLT circuit designs. The primary differentiation between substitutes is sensing range specification.

Parameter Comparison

Parameter	A3283LLT	SS561AT	SS566AT
Manufacturer	Allegro MicroSystems	Honeywell Sensing and Productivity Solutions	Honeywell Sensing and Productivity Solutions
Function	Latch	Latch	Latch
Technology	Hall Effect	Hall Effect	Hall Effect
Polarization	South Pole	South Pole	South Pole
Output Type	Open Collector	Open Collector	Open Collector
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA, Variant	TO-243AA, Variant
Voltage - Supply	4.2V ~ 24V	3.8V ~ 30V	3.8V ~ 30V
Current - Supply (Max)	8mA	10mA	10mA
Current - Output (Max)	25mA	50mA	50mA
Operating Temperature	-40°C ~ 150°C (TA)	-40°C ~ 150°C (TA)	-40°C ~ 150°C (TA)
Sensing Range	18mT Trip, -18mT Release	8.5mT Trip, -8.5mT Release	18mT Trip, -18mT Release
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

SS566AT is the direct functional equivalent to the A3283LLT, providing identical sensing range specification (18mT trip, -18mT release) while maintaining all core functional parameters. SS566AT is an active product with RoHS compliance, ensuring regulatory alignment and supply chain continuity. This component is recommended as the primary replacement for A3283LLT applications.

SS561AT provides functional substitution with a lower sensing range threshold (8.5mT trip, -8.5mT release) compared to the A3283LLT. This substitute is suitable only for applications where the reduced magnetic sensitivity is compatible with system requirements. SS561AT is also an active product with RoHS compliance.

Both Honeywell substitutes provide enhanced electrical performance characteristics, including expanded supply voltage range and increased output current capability, which offer design flexibility and improved reliability margins compared to the obsolete A3283LLT.

Frequently Asked Questions (FAQ)

Q: Can SS561AT and SS566AT be used interchangeably with A3283LLT?

A: Both components share functional equivalence in latch operation, Hall Effect technology, south pole polarization, open collector output, and operating temperature range. However, SS561AT operates at a lower sensing range (8.5mT) compared to A3283LLT and SS566AT (18mT). Selection depends on application-specific magnetic field detection requirements. SS566AT provides direct sensing range equivalence to A3283LLT.

Q: Are there package compatibility considerations?

A: A3283LLT uses SOT-89-3 packaging, while SS561AT and SS566AT use SOT-89B packaging. Both are TO-243AA variants and are surface mount components. Physical footprint verification is required during PCB layout transition to confirm mechanical compatibility.

Q: What are the compliance differences?

A: A3283LLT is RoHS non-compliant. Both SS561AT and SS566AT are RoHS compliant, meeting current regulatory requirements for electronic component manufacturing and use.

Q: Do the substitutes support the same supply voltage range?

A: A3283LLT operates at 4.2V ~ 24V. Both SS561AT and SS566AT support an expanded range of 3.8V ~ 30V, providing greater design flexibility and compatibility with a wider range of power supply configurations.

Q: What is the difference in output current capability?

A: A3283LLT provides maximum output current of 25mA. Both SS561AT and SS566AT provide 50mA maximum output current, offering improved drive capability for downstream circuitry.

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