ADT7461ARMZ-2 Equivalent & Substitute Parts

Part Overview

The ADT7461ARMZ-2 is a digital temperature sensor manufactured by onsemi, designed for local and remote temperature monitoring across -40°C to 120°C (local) and -55°C to 150°C (remote) operating ranges. This component features SMBus output, 8-bit resolution, and operates on 3V to 5.5V supply voltage. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

ADT7461ARMZ-2

onsemiIn Stock: 981ADT7461ARMZ-2 Datasheet

Current PartRFQ

EMC1422-2-ACZL-TR

Microchip TechnologyIn Stock: 894EMC1422-2-ACZL-TR Datasheet

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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

Substitution of the ADT7461ARMZ-2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Sensor Type: Digital, Local/Remote
• Output Type: SMBus
• Package / Case: 8-MSOP form factor
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Criteria:

• Voltage Supply Range: Must overlap with 3V ~ 5.5V
• Operating Temperature Range: Must accommodate -40°C ~ 120°C minimum
• Resolution: 8-bit or higher
• Accuracy: ±3°C or better

The substitute parts identified maintain SMBus protocol compatibility and 8-MSOP packaging, ensuring direct functional replacement in existing circuit designs. Variations in resolution, accuracy, and temperature range are noted where they exceed the original specification.

Parameter Comparison

Engineering Selection Recommendations

EMC1422-2-ACZL-TR (Microchip Technology) is the primary substitute for the ADT7461ARMZ-2. This part maintains 8-MSOP packaging and SMBus protocol compatibility. The EMC1422-2-ACZL-TR offers extended local temperature range (-40°C ~ 125°C) and superior accuracy (±1°C to ±2°C). The part is currently active in production with ROHS3 compliance. Supply voltage is limited to 3V ~ 3.6V, requiring circuit verification if 5.5V operation is required.

LM86CIMMX/NOPB (Texas Instruments) provides an active production alternative with established supply availability (2071 pcs in stock). This part maintains SMBus output and surface mount configuration. Local temperature range is restricted to 0°C ~ 85°C, making it unsuitable for applications requiring -40°C operation. ROHS3 compliance is confirmed.

LM90CIMMX/NOPB (National Semiconductor) is an active production option with the highest inventory availability (4281 pcs in stock). This part shares SMBus protocol and surface mount characteristics. Temperature range limitation (0°C ~ 85°C local) and reduced accuracy (±4°C) must be evaluated against application requirements.

LM90CIMM/NOPB (National Semiconductor) offers similar specifications to LM90CIMMX/NOPB with 3300 pcs available inventory. Product status is active. Temperature and accuracy limitations apply identically.

LM86CIMM/NOPB (Texas Instruments) is an obsolete part with 1694 pcs in stock. This option shares temperature range limitations (0°C ~ 85°C local) with other LM86 variants and is not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can the EMC1422-2-ACZL-TR directly replace the ADT7461ARMZ-2 in all applications?

A: The EMC1422-2-ACZL-TR maintains SMBus protocol and 8-MSOP packaging compatibility. However, supply voltage range is reduced to 3V ~ 3.6V. Applications requiring 5V operation must be redesigned or use alternative substitutes. The extended temperature range and improved accuracy of the EMC1422-2-ACZL-TR exceed the original specification.

Q: Why do the LM90 and LM86 series have restricted temperature ranges?

A: The LM90 and LM86 series are specified for 0°C ~ 85°C local temperature sensing, which does not cover the ADT7461ARMZ-2 lower operating limit of -40°C. These parts are suitable only for applications operating above 0°C.

Q: What is the difference between 8-MSOP and 8-VSSOP packaging?

A: Both are 8-pin surface mount packages with 0.118" (3.00mm) width. The VSSOP variant has a different pin configuration and footprint. PCB layout modifications are required when substituting between these package types.

Q: Are all substitute parts RoHS compliant?

A: EMC1422-2-ACZL-TR, LM86CIMM/NOPB, and LM86CIMMX/NOPB are confirmed ROHS3 compliant. LM90CIMM/NOPB and LM90CIMMX/NOPB do not specify RoHS status in the provided data.

Q: Which substitute offers the best accuracy?

A: The EMC1422-2-ACZL-TR provides the highest accuracy at ±1°C (±2°C), compared to ±3°C for the ADT7461ARMZ-2 and LM86 series, and ±4°C for the LM90 series.

Q: Can I use LM90CIMMX/NOPB for -40°C applications?

A: No. The LM90CIMMX/NOPB is specified for 0°C ~ 85°C local temperature range and cannot reliably operate at -40°C. The EMC1422-2-ACZL-TR is the only substitute supporting the full -40°C lower limit.