ADT7461ARMZ-2RL7 Equivalent & Substitute Parts

Part Overview

The ADT7461ARMZ-2RL7 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-2RL7

onsemiIn Stock: 793ADT7461ARMZ-2RL7 Datasheet

Current PartRFQ

ADT7461ARMZ-R7

onsemiIn Stock: 15504ADT7461ARMZ-R7 Datasheet

DirectRFQ

EMC1422-2-ACZL-TR

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

SimilarRFQ

LM86CIMM/NOPB

Texas InstrumentsIn Stock: 1752LM86CIMM/NOPB Datasheet

SimilarRFQ

LM86CIMMX/NOPB

Texas InstrumentsIn Stock: 2141LM86CIMMX/NOPB Datasheet

SimilarRFQ

LM90CIMM/NOPB

National SemiconductorIn Stock: 3407LM90CIMM/NOPB Datasheet

SimilarRFQ

LM90CIMMX/NOPB

National SemiconductorIn Stock: 4391LM90CIMMX/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ADT7461ARMZ-2RL7 is determined by the following critical parameters:

• Package compatibility: 8-MSOP form factor with 0.118" width (3.00mm)
• Interface protocol: SMBus output requirement
• Local temperature range: Minimum -40°C ~ 120°C coverage
• Remote temperature range: Minimum -55°C ~ 150°C coverage
• Supply voltage: 3V ~ 5.5V operating range
• Sensor type: Digital, Local/Remote dual-channel capability
• Mounting: Surface mount technology

Substitute parts are classified into two categories:

Direct Substitutes maintain identical electrical and mechanical specifications, enabling pin-for-pin replacement without design modification.

Similar Substitutes provide equivalent functionality within the specified parameter ranges but may have minor variations in resolution, accuracy, or temperature range limits. These require verification of application-specific requirements before implementation.

Parameter Comparison

Engineering Selection Recommendations

ADT7461ARMZ-R7 (onsemi) is the primary direct substitute. This part maintains identical electrical specifications and 8-MSOP packaging as the ADT7461ARMZ-2RL7. The key distinction is active product status with ROHS3 compliance, making it suitable for new production designs. Inventory availability is significantly higher (15,400 units) compared to the obsolete original part.

EMC1422-2-ACZL-TR (Microchip Technology) provides enhanced performance with 11-bit resolution and ±1°C accuracy compared to the original 8-bit, ±3°C specification. Extended remote temperature range (-64°C ~ 191°C) exceeds original capabilities. However, supply voltage is limited to 3V ~ 3.6V, which is narrower than the original 3V ~ 5.5V range. This part is suitable for applications where the reduced voltage range is acceptable and higher resolution is beneficial.

LM86CIMMX/NOPB (Texas Instruments) and LM90CIMMX/NOPB (National Semiconductor) are similar substitutes with active product status. Both operate within 3V ~ 3.6V supply range and provide 7-bit local / 10-bit remote resolution. Local temperature sensing is limited to 0°C ~ 85°C, which does not cover the original -40°C lower limit. These parts are applicable only for applications operating above 0°C.

LM86CIMM/NOPB and LM90CIMM/NOPB share identical electrical specifications with their respective CIMMX variants but carry obsolete product status, limiting their suitability for new designs.

Frequently Asked Questions (FAQ)

Q: Can ADT7461ARMZ-R7 be used as a direct replacement for ADT7461ARMZ-2RL7?

A: Yes. ADT7461ARMZ-R7 maintains identical electrical and mechanical specifications, including 8-MSOP packaging, SMBus interface, -40°C ~ 120°C local temperature range, -55°C ~ 150°C remote range, 3V ~ 5.5V supply voltage, and 8-bit resolution. The primary difference is active product status and ROHS3 compliance.

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, but they differ in physical construction and thermal characteristics. 8-VSSOP (Very Small Shrink Small Outline Package) has different lead geometry compared to 8-MSOP (Micro Small Outline Package). PCB layout and thermal management considerations may differ between these packages.

Q: Why do LM86 and LM90 series parts have lower local temperature range?

A: LM86 and LM90 series sensors are specified for 0°C ~ 85°C local temperature sensing, which does not cover the -40°C lower limit of the ADT7461ARMZ-2RL7. These parts are suitable only for applications operating within 0°C ~ 85°C range.

Q: Is EMC1422-2-ACZL-TR compatible with 5V supply voltage?

A: No. EMC1422-2-ACZL-TR operates on 3V ~ 3.6V supply voltage only. The original ADT7461ARMZ-2RL7 supports 3V ~ 5.5V. Applications requiring 5V operation must use ADT7461ARMZ-R7 or verify that EMC1422-2-ACZL-TR can operate with a regulated 3.3V supply derived from the 5V rail.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European environmental regulations restricting lead and other hazardous substances. For new production designs, ROHS3 compliant parts are required in most markets.

Q: Can I use LM90CIMMX/NOPB in an application requiring -40°C operation?

A: No. LM90CIMMX/NOPB local temperature sensing range is 0°C ~ 85°C. Applications requiring -40°C operation must use ADT7461ARMZ-R7 or EMC1422-2-ACZL-TR.

Q: What is the significance of resolution differences (8-bit vs. 11-bit)?

A: Resolution determines temperature measurement granularity. 8-bit resolution provides 0.5°C steps across the temperature range, while 11-bit resolution provides finer 0.0625°C steps. Higher resolution enables more precise temperature monitoring but may not be necessary for all applications.