A3340EUA-T Equivalent & Substitute Parts

Part Overview

The A3340EUA-T is a unipolar magnetic switch utilizing Hall Effect technology, designed for digital switching applications with open collector output. This component operates across a supply voltage range of 4.2V to 24V and features a sensing range of 5mT trip with 0.5mT release characteristics. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

A3340EUA-T

Allegro MicroSystemsIn Stock: 984A3340EUA-T Datasheet

Current PartRFQ

A1125EUA-T

Allegro MicroSystemsIn Stock: 740A1125EUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3340EUA-T is determined by strict alignment of the following critical parameters:

• Function & Technology: Unipolar switch with Hall Effect sensing
• Polarization: South pole detection
• Sensing Range: 5mT trip threshold with 0.5mT release threshold
• Supply Voltage Range: Minimum 4.2V operation capability
• Output Type: Open collector or open drain configuration
• Current Ratings: Output current capacity of 25mA
• Operating Temperature: -40°C to 85°C range
• Package: 3-SSIP through-hole mounting
• Compliance: ROHS3 compliance requirement

The A1125EUA-T qualifies as a direct substitute based on matching all critical electrical and mechanical parameters, with the exception of output type (open drain versus open collector) and supply voltage floor (3V minimum versus 4.2V minimum). These differences are functionally compatible in most applications where the A3340EUA-T was deployed.

Parameter Comparison

Engineering Selection Recommendations

The A1125EUA-T is the qualified substitute for the obsolete A3340EUA-T. Selection of this replacement component is supported by the following factors:

• Product Status: The A1125EUA-T maintains active production status, ensuring long-term availability and supply chain continuity.
• Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.
• Automotive Qualification: The A1125EUA-T carries AEC-Q100 qualification, providing enhanced reliability assurance for applications requiring automotive-grade components.
• Electrical Compatibility: Matching sensing range, output current capacity, and operating temperature range ensure functional equivalence in existing circuit designs.
• Output Configuration: The transition from open collector to open drain output requires verification of pull-up resistor configuration in the host circuit, as open drain output may require external pull-up resistor adjustment depending on application requirements.

Frequently Asked Questions (FAQ)

Q: Can the A1125EUA-T directly replace the A3340EUA-T without circuit modification?

A: The A1125EUA-T is electrically compatible with the A3340EUA-T in most applications. The primary difference is output type (open drain versus open collector). Verify that your circuit's pull-up resistor configuration is appropriate for open drain output. Both components share identical sensing range, output current capacity, and operating temperature specifications.

Q: What is the difference between open collector and open drain output?

A: Both output types function as switches that pull the output line to ground when activated. Open collector typically refers to bipolar transistor output, while open drain refers to MOSFET output. From a circuit perspective, they are functionally equivalent when properly terminated with pull-up resistors.

Q: Does the lower minimum supply voltage of the A1125EUA-T (3V vs 4.2V) affect compatibility?

A: The A1125EUA-T's lower minimum supply voltage of 3V is a superset capability that does not restrict operation at the A3340EUA-T's 4.2V minimum. Applications operating at 4.2V or higher will function identically with the substitute component.

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

A: Yes, both the A3340EUA-T and A1125EUA-T use the 3-SSIP through-hole package, ensuring mechanical and electrical pin compatibility for direct board-level substitution.

Q: What does AEC-Q100 qualification mean for the A1125EUA-T?

A: AEC-Q100 is an automotive electronics qualification standard that certifies component reliability under automotive operating conditions. This qualification enhances the A1125EUA-T's suitability for applications requiring automotive-grade reliability assurance.