A1321EUA-T Hall Effect Sensor Equivalent & Substitute Parts

Part Overview

The A1321EUA-T is a Hall Effect analog magnetic sensor manufactured by Allegro MicroSystems, designed for single-axis magnetic field detection with analog voltage output. This component operates within the 4.5V to 5.5V supply range and is housed in a 3-SIP through-hole package. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

A1321EUA-T

Allegro MicroSystemsIn Stock: 8718A1321EUA-T Datasheet

Current PartRFQ

A1324LUA-T

Allegro MicroSystemsIn Stock: 1816A1324LUA-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A1321EUA-T is determined by the following critical parameters:

Primary Compatibility Criteria:

• Identical technology classification (Hall Effect)
• Matching axis configuration (Single)
• Identical output type (Analog Voltage)
• Compatible supply voltage range (4.5V ~ 5.5V)
• Identical package form factor (3-SIP / 3-SSIP)
• Identical mounting type (Through Hole)
• Temperature compensation feature presence

Secondary Compatibility Factors:

• Supply current and output current ratings must not exceed system design limits
• Bandwidth specifications must support application frequency requirements
• Operating temperature range must encompass application environment
• Regulatory compliance (RoHS3, REACH) must be maintained

The A1324LUA-T meets all primary compatibility criteria and qualifies as a manufacturer-recommended substitute. This part maintains identical supply voltage, package configuration, mounting type, and temperature compensation characteristics while offering extended operating temperature range and active product status.

Parameter Comparison

Engineering Selection Recommendations

The A1324LUA-T is the manufacturer-recommended substitute for the obsolete A1321EUA-T. Selection of this substitute is supported by the following engineering factors:

Compliance & Regulatory Status: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental standards.

Product Lifecycle: The A1324LUA-T holds active product status with confirmed inventory availability (1800 pcs), whereas the A1321EUA-T is obsolete. This distinction is critical for long-term supply chain reliability and design continuity.

Electrical Compatibility: The substitute maintains identical supply voltage range (4.5V ~ 5.5V), output type (analog voltage), and current output rating (10mA max). The increased supply current requirement (9mA vs. 8mA) represents a 1mA differential that must be evaluated within system power budget constraints.

Thermal Performance: The A1324LUA-T extends the maximum operating temperature from 85°C to 150°C, providing enhanced thermal margin for applications operating in elevated ambient conditions.

Frequency Response Consideration: The A1324LUA-T bandwidth specification (17kHz) is reduced compared to the A1321EUA-T (30kHz). Applications requiring signal frequencies approaching or exceeding 17kHz must evaluate whether this bandwidth reduction impacts system performance.

Package & Mounting: Identical 3-SIP through-hole package configuration ensures direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the A1324LUA-T be used as a direct replacement for the A1321EUA-T without PCB modifications?

A: Yes. Both parts use identical 3-SIP through-hole package configuration and pin assignments, enabling direct socket substitution without PCB layout changes.

Q: What is the significance of the bandwidth difference between these parts?

A: The A1321EUA-T operates at 30kHz bandwidth while the A1324LUA-T operates at 17kHz. Applications detecting magnetic field variations at frequencies above 17kHz may experience signal attenuation with the substitute. Applications operating below 17kHz are unaffected.

Q: Does the increased supply current requirement of the A1324LUA-T affect system design?

A: The substitute requires 9mA maximum supply current versus 8mA for the original part, representing a 1mA increase. System power supplies must accommodate this additional current draw. For most applications, this differential is negligible; however, power-constrained designs should verify available supply capacity.

Q: Why is the A1321EUA-T classified as obsolete?

A: Obsolete classification indicates the manufacturer has discontinued production. The A1324LUA-T is the active replacement offering equivalent functionality with extended operating temperature range and confirmed ongoing availability.

Q: Are there any temperature-related considerations when substituting these parts?

A: The A1324LUA-T supports operation to 150°C maximum, compared to 85°C for the A1321EUA-T. Applications operating within the original -40°C to 85°C range experience no thermal performance change. Applications requiring operation above 85°C benefit from the extended thermal capability of the substitute.

Q: What compliance certifications apply to both parts?

A: Both the A1321EUA-T and A1324LUA-T maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental and hazardous substance restrictions.