HMC1021D Equivalent & Substitute Parts

Part Overview

The HMC1021D is a magnetoresistive sensor manufactured by Honeywell Aerospace, designed for single-axis magnetic field detection using a Wheatstone bridge output configuration. The device is packaged in an 8-CDIP through-hole format and operates across an extended temperature range of -55°C to 225°C.

The HMC1021D is classified as obsolete. Identifying equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity where through-hole or surface-mount alternatives are required.

Substiute Parts

HMC1021D

Honeywell AerospaceIn Stock: 878HMC1021D Datasheet

Current PartRFQ

HMC1021S-TR

Honeywell AerospaceIn Stock: 9159HMC1021S-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HMC1021D is determined by the following critical parameters:

Core Functional Parameters:

• Technology: Magnetoresistive
• Axis Configuration: Single
• Output Type: Wheatstone Bridge
• Sensing Range: ±0.6mT
• Bandwidth: 5MHz

Electrical Compatibility Parameters:

• Voltage Supply Range (must accommodate the original 2V ~ 25V specification or a subset thereof)

Physical & Mounting Parameters:

• Package format (through-hole or surface-mount variants of the same base product family)

The HMC1021S-TR qualifies as a substitute based on matching core functional parameters (magnetoresistive single-axis Wheatstone bridge sensor with ±0.6mT range and 5MHz bandwidth). However, the substitute differs in package format (8-SOIC surface-mount versus 8-CDIP through-hole), voltage supply range (2V ~ 12V versus 2V ~ 25V), and operating temperature range (-40°C ~ 125°C versus -55°C ~ 225°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement:

The HMC1021S-TR provides functional equivalence in magnetic sensing performance (magnetoresistive technology, single-axis configuration, Wheatstone bridge output, ±0.6mT range, 5MHz bandwidth). Both devices are manufactured by Honeywell Aerospace and maintain RoHS compliance.

Critical Constraints for Substitution:

1. Voltage Supply Limitation: The HMC1021S-TR operates within 2V ~ 12V, whereas the HMC1021D supports 2V ~ 25V. Applications requiring supply voltages above 12V cannot use the HMC1021S-TR without circuit redesign.

2. Temperature Range Limitation: The HMC1021S-TR operates within -40°C ~ 125°C, whereas the HMC1021D supports -55°C ~ 225°C. Applications requiring operation below -40°C or above 125°C cannot use the HMC1021S-TR.

3. Package and Mounting Transition: The HMC1021S-TR uses 8-SOIC surface-mount packaging versus the through-hole 8-CDIP format of the HMC1021D. PCB layout and assembly process modifications are required.

Substitution Applicability:

The HMC1021S-TR is suitable as a substitute only when all of the following conditions are met:

• Operating voltage does not exceed 12V
• Operating temperature range falls within -40°C to 125°C
• Surface-mount assembly is acceptable or feasible
• PCB redesign for the smaller 8-SOIC footprint is permissible

Frequently Asked Questions (FAQ)

Q: Can the HMC1021S-TR replace the HMC1021D in all applications?

A: No. The HMC1021S-TR has narrower voltage supply (2V ~ 12V versus 2V ~ 25V) and temperature (−40°C ~ 125°C versus −55°C ~ 225°C) ranges. Substitution is valid only when the application operates within these narrower limits.

Q: What is the primary difference between these two parts?

A: The HMC1021D uses through-hole 8-CDIP packaging for PCB insertion mounting, while the HMC1021S-TR uses surface-mount 8-SOIC packaging. Both provide identical magnetic sensing functionality (magnetoresistive, single-axis, Wheatstone bridge, ±0.6mT, 5MHz).

Q: Are there any compliance differences?

A: Both parts are RoHS compliant. The HMC1021D is RoHS Compliant, and the HMC1021S-TR is ROHS3 Compliant. Both meet current environmental standards.

Q: Why is the HMC1021D obsolete?

A: The HMC1021D is classified as obsolete by the manufacturer. The HMC1021S-TR is the active production equivalent, representing the current standard offering in the HMC1021 product family.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) matching magnetoresistive technology and single-axis configuration, (2) identical Wheatstone bridge output type, (3) identical ±0.6mT sensing range, (4) identical 5MHz bandwidth, (5) application voltage within 2V ~ 12V, (6) application temperature within −40°C ~ 125°C, and (7) compatibility with surface-mount assembly.

Q: Can I use the HMC1021S-TR in a design originally specified for the HMC1021D without any changes?

A: No. At minimum, PCB layout must be modified to accommodate the different package footprint (8-SOIC versus 8-CDIP). Additionally, if the original design uses supply voltages above 12V or operates outside the −40°C to 125°C range, the HMC1021S-TR cannot be used.