ADT7421ARMZ-2RL Equivalent & Substitute Parts

Part Overview

The ADT7421ARMZ-2RL is a temperature monitoring integrated circuit manufactured by onsemi, classified as an Interface component in the temperature sensor category. This device operates as a digital temperature sensor with logic-level input and output, designed for surface mount applications in the 8-MSOP package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

ADT7421ARMZ-2RL

onsemiIn Stock: 2121ADT7421ARMZ-2RL Datasheet

Current PartRFQ

LM86CIMM/NOPB

Texas InstrumentsIn Stock: 1752LM86CIMM/NOPB Datasheet

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LM86CIMMX/NOPB

Texas InstrumentsIn Stock: 2141LM86CIMMX/NOPB Datasheet

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LM90CIMM/NOPB

National SemiconductorIn Stock: 3407LM90CIMM/NOPB Datasheet

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LM90CIMMX/NOPB

National SemiconductorIn Stock: 4391LM90CIMMX/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADT7421ARMZ-2RL are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Package compatibility: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Mounting type: Surface Mount
• Output interface: Logic-level or SMBus digital output
• Temperature sensing capability: Digital sensor with local/remote temperature monitoring
• Supply voltage range: Compatible with 3V ~ 3.6V operation
• Moisture sensitivity: MSL 1 (Unlimited)

The substitute parts listed below meet these core electrical and mechanical parameters, enabling direct replacement in applications requiring temperature monitoring functionality with compatible package and interface specifications.

Parameter Comparison

Engineering Selection Recommendations

Active Product Status Priority: LM86CIMMX/NOPB and LM90CIMMX/NOPB are designated as active products, making them the preferred choices for new designs and long-term system support. LM86CIMM/NOPB and LM90CIMM/NOPB are obsolete, similar to the primary part, and should be considered only when active alternatives are unavailable.

Compliance and Regulatory Alignment: All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification, consistent with the ADT7421ARMZ-2RL. This ensures regulatory compliance across equivalent selections.

Package and Mounting Compatibility: All listed substitutes share the 8-TSSOP, 8-MSOP package footprint and surface mount configuration, enabling direct PCB layout compatibility without redesign.

Supply Voltage and Operating Temperature: Substitute parts operate within 3V ~ 3.6V supply voltage and 0°C ~ 125°C operating temperature ranges. Applications requiring the ADT7421ARMZ-2RL's extended lower temperature range (-40°C) must verify substitute performance at system minimum temperatures.

Frequently Asked Questions (FAQ)

Q: Can LM86CIMMX/NOPB directly replace ADT7421ARMZ-2RL in existing designs? A: Direct replacement is possible if the application operates within the LM86CIMMX/NOPB operating temperature range (0°C ~ 125°C) and supply voltage range (3V ~ 3.6V). The 8-MSOP package footprint is identical, requiring no PCB modifications. Verify interface protocol compatibility with your system design.

Q: What is the difference between LM86 and LM90 series substitutes? A: Both LM86 and LM90 series devices provide digital local/remote temperature sensing in compatible packages. The primary difference is accuracy specification: LM86 series offers ±3°C accuracy, while LM90 series specifies ±4°C accuracy. Both support SMBus output interface and identical package configurations.

Q: Why is LM86CIMMX/NOPB preferred over LM86CIMM/NOPB? A: LM86CIMMX/NOPB maintains active product status with current manufacturing support, while LM86CIMM/NOPB is obsolete. For new designs and long-term availability, the active part number is the recommended selection.

Q: Are there supply voltage compatibility concerns with substitute parts? A: The ADT7421ARMZ-2RL specifies 4 mA supply current without explicit voltage range. Substitute parts operate at 3V ~ 3.6V. Verify your system power supply delivers this voltage range before substitution.

Q: Do substitute parts support the same temperature sensing range? A: Substitute parts sense temperatures from 0°C ~ 85°C (local and remote channels). The ADT7421ARMZ-2RL sensing range is not specified in available data. If your application requires extended temperature sensing below 0°C, verify substitute performance against system requirements.

Q: Is firmware or software modification required when substituting these parts? A: Substitute parts use SMBus interface protocol. Verify your system firmware supports SMBus communication. If the original design uses a different interface protocol, firmware modification may be necessary.