ADT7461AARMZ Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The ADT7461AARMZ is a digital temperature sensor manufactured by onsemi, designed for local and remote temperature monitoring applications. It operates across a -40°C to 120°C local sensing range with SMBus output interface and 8-bit resolution. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility in SMBus-based thermal management systems while meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	ADT7461AARMZ
Manufacturer	onsemi
Sensor Type	Digital, Local/Remote
Sensing Temperature - Local	-40°C ~ 120°C
Sensing Temperature - Remote	-64°C ~ 191°C
Output Type	SMBus
Voltage Supply	3V ~ 3.6V
Resolution	8 b
Accuracy	±1°C (0°C ~ 70°C), ±2.5°C (-40°C ~ 100°C)
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Features	One-Shot, Output Switch, Programmable Limit, Standby Mode
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output Interface: SMBus protocol compatibility
Supply Voltage: 3V ~ 3.6V operating range
Package Type: 8-MSOP or 8-TSSOP surface mount
Sensor Configuration: Digital, Local/Remote capability
Mounting: Surface mount technology

The ADT7461AARMZ has one direct substitute from the same manufacturer and three similar substitutes from alternative manufacturers. The direct substitute maintains identical electrical and mechanical specifications with improved product status. Similar substitutes from Texas Instruments and National Semiconductor provide functional equivalence through SMBus interface compatibility and matching supply voltage, though with different temperature sensing ranges and resolution configurations.

Parameter Comparison

Parameter	ADT7461AARMZ	ADT7461AARMZ-R	LM86CIMM/NOPB	LM86CIMMX/NOPB	LM90CIMM/NOPB	LM90CIMMX/NOPB
Manufacturer	onsemi	onsemi	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
Output Type	SMBus	SMBus	SMBus	SMBus	SMBus	SMBus
Voltage Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
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
Sensing Temperature - Local	-40°C ~ 120°C	-40°C ~ 120°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C
Sensing Temperature - Remote	-64°C ~ 191°C	-64°C ~ 191°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C
Resolution	8 b	8 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	±1°C (±2.5°C)	±1°C (±2.5°C)	±3°C	±3°C	±4°C	±4°C
Product Status	Obsolete	Active	Obsolete	Active	Active	Active
Features	One-Shot, Output Switch, Programmable Limit, Standby Mode	One-Shot, Output Switch, Programmable Limit, Standby Mode	One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Standby Mode	One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Standby Mode	One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Standby Mode	One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Standby Mode

Engineering Selection Recommendations

Primary Recommendation: ADT7461AARMZ-R

The ADT7461AARMZ-R is the direct substitute from onsemi. It maintains identical electrical specifications, temperature sensing ranges, resolution, and accuracy as the original part. The primary advantage is active product status with ROHS3 compliance certification. This part is available in Tape & Reel packaging with 6160 units in stock, providing supply continuity for production environments.

Alternative Recommendations: LM86CIMMX/NOPB and LM90CIMMX/NOPB

The LM86CIMMX/NOPB from Texas Instruments and LM90CIMMX/NOPB from National Semiconductor are functionally equivalent alternatives with active product status. Both maintain SMBus interface compatibility and 3V ~ 3.6V supply voltage specifications. These parts are suitable for applications where the local sensing temperature range of 0°C ~ 85°C is sufficient. Both parts carry ROHS3 compliance certification. The LM86CIMMX/NOPB has 2071 units in stock, while the LM90CIMMX/NOPB has 4281 units available.

Consideration for Extended Temperature Range Applications

If the application requires the full -40°C to 120°C local sensing range of the original ADT7461AARMZ, the ADT7461AARMZ-R is the only substitute that maintains this specification. The Texas Instruments and National Semiconductor alternatives are limited to 0°C ~ 85°C local sensing range and are not suitable for extended low-temperature or high-temperature monitoring applications.

Frequently Asked Questions (FAQ)

Q: Can LM86CIMMX/NOPB or LM90CIMMX/NOPB be used as direct replacements for ADT7461AARMZ?

A: These parts are functionally compatible for SMBus-based thermal management systems operating within 0°C ~ 85°C local sensing range. However, they do not support the full -40°C to 120°C temperature range of the original part. Application requirements must be evaluated to confirm temperature range compatibility.

Q: What is the difference between ADT7461AARMZ and ADT7461AARMZ-R?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format and product status. ADT7461AARMZ-R is supplied in Tape & Reel format and maintains active product status with ROHS3 compliance, while the original ADT7461AARMZ is obsolete.

Q: Are all substitute parts compatible with existing PCB designs?

A: Yes. All substitute parts use identical 8-MSOP or 8-TSSOP surface mount packages with matching pin configurations and SMBus interface protocols. PCB layout and footprint compatibility is maintained across all listed substitutes.

Q: What is the resolution difference between ADT7461AARMZ and the LM86/LM90 series?

A: The ADT7461AARMZ provides 8-bit local temperature resolution. The LM86 and LM90 series provide 7-bit local temperature resolution with 10-bit remote resolution. For applications requiring 8-bit local resolution, the ADT7461AARMZ-R is the appropriate choice.

Q: Which substitute part has the best accuracy specification?

A: The ADT7461AARMZ and ADT7461AARMZ-R offer the highest accuracy at ±1°C (0°C ~ 70°C) and ±2.5°C (-40°C ~ 100°C). The LM86 series provides ±3°C accuracy, while the LM90 series provides ±4°C accuracy. Accuracy requirements must be evaluated against application specifications.

Q: Are all substitute parts RoHS compliant?

A: The ADT7461AARMZ-R, LM86CIMMX/NOPB, and LM90CIMMX/NOPB carry ROHS3 compliance certification. The LM86CIMM/NOPB and LM90CIMM/NOPB also carry ROHS3 compliance. All parts meet current environmental compliance standards.

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