A3283LUA-T Equivalent & Substitute Parts

Part Overview

The A3283LUA-T is a digital switch latch Hall Effect magnetic sensor manufactured by Allegro MicroSystems, housed in a 3-SIP through-hole package. This component functions as an open collector magnetic switch with south pole polarization, designed for applications requiring latching behavior in response to magnetic field detection. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure long-term supply chain reliability.

Substiute Parts

A3283LUA-T

Allegro MicroSystemsIn Stock: 111495A3283LUA-T Datasheet

Current PartRFQ

A1223LUA-T

Allegro MicroSystemsIn Stock: 8836A1223LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The A1223LUA-T qualifies as a direct substitute for the A3283LUA-T based on the following critical parameters:

• Hall Effect Technology: Both components utilize Hall Effect sensing with identical south pole polarization
• Latching Function: Both provide latch-mode operation with matching 18mT trip and -18mT release thresholds
• Sensing Range: Identical magnetic field detection parameters ensure functional equivalence
• Operating Temperature Range: Both operate across -40°C to 150°C, maintaining thermal compatibility
• Package Configuration: Both use 3-SSIP through-hole packaging, ensuring mechanical and electrical pin compatibility
• Regulatory Compliance: Both meet ROHS3 and REACH requirements

The primary distinction lies in output stage implementation (open collector versus open drain) and supply voltage range optimization, with the A1223LUA-T representing an active production component.

Parameter Comparison

Engineering Selection Recommendations

The A1223LUA-T is the designated substitute for the obsolete A3283LUA-T. Selection of the A1223LUA-T is supported by:

• Active Production Status: The A1223LUA-T maintains current manufacturing and distribution, eliminating supply chain discontinuity
• Functional Equivalence: Identical Hall Effect latching behavior, sensing thresholds, and temperature operating range ensure drop-in compatibility
• Enhanced Compliance: AEC-Q100 automotive qualification provides additional reliability assurance beyond the base ROHS3 and REACH compliance shared with the original part
• Improved Supply Characteristics: Lower maximum supply current (4mA versus 8mA) represents a design refinement while maintaining output current capacity

The transition from open collector to open drain output requires verification that pull-up resistor networks in the host circuit are appropriately configured, though both topologies are functionally equivalent in standard latch-mode applications.

Frequently Asked Questions (FAQ)

Q: Can the A1223LUA-T directly replace the A3283LUA-T without circuit modifications?

A: The A1223LUA-T is mechanically and electrically compatible in 3-SSIP through-hole applications. Both components share identical sensing thresholds, latching function, and temperature range. The output stage difference (open collector versus open drain) is functionally equivalent when proper pull-up resistor networks are present in the host circuit.

Q: What is the significance of the supply voltage range difference (4.2V ~ 24V versus 3V ~ 24V)?

A: The A1223LUA-T extends the lower supply voltage limit to 3V, providing broader application flexibility. Designs operating at 4.2V or higher are fully compatible with both components. The A1223LUA-T does not impose additional constraints on existing 4.2V ~ 24V designs.

Q: Why does the A1223LUA-T have lower maximum supply current (4mA versus 8mA)?

A: The reduced supply current specification reflects design optimization in the active production component. This improvement reduces power consumption while maintaining identical output current capacity (25mA) and functional performance.

Q: Is the A1223LUA-T suitable for automotive applications?

A: Yes. The A1223LUA-T carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications. The original A3283LUA-T does not specify automotive qualification.

Q: Are there any package or pinout differences between these components?

A: Both components use identical 3-SSIP through-hole packaging with matching pin configurations. No layout or mechanical modifications are required for substitution.

Q: What compliance certifications apply to both parts?

A: Both the A3283LUA-T and A1223LUA-T are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.