ADT7461ARMZ-2REEL Equivalent & Substitute Parts

Part Overview

The ADT7461ARMZ-2REEL 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 classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	ADT7461ARMZ-2REEL
Manufacturer	onsemi
Category	Temperature Sensors
Sensor Type	Digital, Local/Remote
Sensing Temperature - Local	-40°C ~ 120°C
Sensing Temperature - Remote	-55°C ~ 150°C
Output Type	SMBus
Voltage - Supply	3V ~ 5.5V
Resolution	8 b
Accuracy	±3°C (-40°C ~ 100°C)
Operating Temperature	-40°C ~ 120°C
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

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

Primary Compatibility Criteria:

Sensor Type: Digital, Local/Remote
Output Type: SMBus
Package / Case: 8-TSSOP or 8-MSOP (0.118", 3.00mm Width)
Mounting Type: Surface Mount
Voltage - Supply: Overlap with 3V ~ 5.5V range

Secondary Compatibility Criteria:

Sensing Temperature - Local: Must cover or exceed -40°C ~ 120°C
Sensing Temperature - Remote: Must cover or exceed -55°C ~ 150°C
Resolution: 8-bit or higher
Accuracy: ±3°C or better

Substitute parts are grouped based on their ability to meet these electrical and mechanical specifications. Parts with extended temperature ranges, higher resolution, or improved accuracy are considered direct substitutes when package and interface requirements are satisfied.

Parameter Comparison

Parameter	ADT7461ARMZ-2REEL	EMC1422-2-ACZL-TR	LM86CIMM/NOPB	LM86CIMMX/NOPB	LM90CIMM/NOPB	LM90CIMMX/NOPB
Manufacturer	onsemi	Microchip Technology	Texas Instruments	Texas Instruments	National Semiconductor	National Semiconductor
Sensor Type	Digital, Local/Remote	Digital, Local/Remote	Digital, Local/Remote	Digital, Local/Remote	Digital, Local/Remote	Digital, Local/Remote
Sensing Temperature - Local	-40°C ~ 120°C	-40°C ~ 125°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C
Sensing Temperature - Remote	-55°C ~ 150°C	-64°C ~ 191°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C
Output Type	SMBus	SMBus	SMBus	SMBus	SMBus	SMBus
Voltage - Supply	3V ~ 5.5V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Resolution	8 b	11 b	7 b (Local), 10 b (Remote)	7 b (Local), 10 b (Remote)	7 b (Local), 10 b (Remote)	7 b (Local), 10 b (Remote)
Accuracy	±3°C	±1°C (±2°C)	±3°C	±3°C	±4°C	±4°C
Operating Temperature	-40°C ~ 120°C	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Obsolete	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	Not specified

Engineering Selection Recommendations

EMC1422-2-ACZL-TR (Microchip Technology) is the primary substitute for the ADT7461ARMZ-2REEL. This part maintains full SMBus compatibility, identical 8-MSOP packaging, and extends the local sensing range to -40°C ~ 125°C with remote range of -64°C ~ 191°C. The EMC1422-2-ACZL-TR offers 11-bit resolution and ±1°C accuracy, exceeding the original specification. Product status is active with ROHS3 compliance and unlimited MSL rating.

LM86CIMMX/NOPB (Texas Instruments) is an active substitute suitable for applications where the local sensing range of 0°C ~ 85°C is acceptable. This part provides SMBus output, identical packaging, and maintains ±3°C accuracy matching the original device. ROHS3 compliance and unlimited MSL are confirmed.

LM90CIMMX/NOPB (National Semiconductor) is an active substitute with identical SMBus interface and 8-MSOP packaging. Local sensing range is 0°C ~ 85°C with ±4°C accuracy. This part is suitable for applications where the reduced temperature range and slightly lower accuracy are acceptable.

LM86CIMM/NOPB (Texas Instruments) and LM90CIMM/NOPB (National Semiconductor) are obsolete alternatives with specifications identical to their CIMMX variants, respectively. These should be avoided for new designs due to obsolete status.

Frequently Asked Questions (FAQ)

Q: Can the EMC1422-2-ACZL-TR directly replace the ADT7461ARMZ-2REEL?

A: Yes. Both parts use SMBus interface, identical 8-MSOP packaging, and surface mount configuration. The EMC1422-2-ACZL-TR extends temperature coverage and improves accuracy, making it a direct electrical and mechanical substitute.

Q: What is the key limitation when using LM86CIMMX/NOPB or LM90CIMMX/NOPB?

A: The local sensing temperature range is limited to 0°C ~ 85°C, compared to the original -40°C ~ 120°C. These substitutes are suitable only for applications operating within this narrower range.

Q: Are there supply voltage compatibility concerns?

A: The ADT7461ARMZ-2REEL operates on 3V ~ 5.5V, while all listed substitutes operate on 3V ~ 3.6V. Designs using 5V supply voltage cannot use these substitutes without voltage regulation.

Q: Does package compatibility require any PCB modifications?

A: No. All substitute parts use 8-TSSOP or 8-MSOP packaging with 0.118" (3.00mm) width, maintaining identical footprint compatibility with the original design.

Q: Which substitute offers the best accuracy?

A: The EMC1422-2-ACZL-TR provides ±1°C accuracy (±2°C at extended range), superior to the original ±3°C specification.

Q: Are all active substitutes RoHS compliant?

A: Yes. EMC1422-2-ACZL-TR, LM86CIMMX/NOPB, and LM90CIMMX/NOPB all carry ROHS3 compliance certification.

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