LM95071CIMF Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM95071CIMF is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across the -40°C to 150°C range with 13-bit resolution and SPI output. The device is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. This status necessitates identification of functionally equivalent alternatives for ongoing applications and new designs requiring similar thermal monitoring capabilities.

Key Parameters

Parameter	LM95071CIMF
Sensor Type	Digital, Local
Sensing Temperature Range	-40°C ~ 150°C
Output Type	SPI
Voltage Supply	2.4V ~ 5.5V
Resolution	13 bits
Accuracy	±1°C (0°C ~ 70°C), ±2°C (-40°C ~ 150°C)
Package	SOT-23-5 (SC-74A)
Mounting Type	Surface Mount
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution of the LM95071CIMF is constrained by the following critical parameters: operating temperature range (-40°C to 150°C), output interface type (SPI), supply voltage compatibility (2.4V ~ 5.5V), and package form factor (SOT-23-5).

The substitute parts identified operate within overlapping but narrower temperature ranges (-40°C to 125°C maximum) and employ different output protocols (I2C/SMBus or 2-Wire Serial instead of SPI). These differences represent functional trade-offs rather than direct equivalencies. Substitution is viable only when the application's actual operating temperature does not exceed 125°C and when the communication protocol can be accommodated by the system design.

The substitute parts are grouped by manufacturer and output interface:

Analog Devices MAX6652 and MAX6683 series: I2C/SMBus output, 10-uMAX/uSOP package
Microchip MCP9844 series: 2-Wire Serial/I2C output, 8-TDFN package

Parameter Comparison

Parameter	LM95071CIMF	LM95071CIMF/NOPB	MAX6652AUB+	MAX6652AUB+T	MAX6683AUB+	MAX6683AUB+T	MCP9844T-BE/MNY	MCP9844T-BE/MNYAA	MCP9844T-BE/MNYAB
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Microchip	Microchip	Microchip
Sensor Type	Digital, Local	Digital, Local	Internal	Internal	Internal	Internal	Internal	Internal	Internal
Sensing Temperature Range	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Output Type	SPI	SPI	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	2-Wire Serial, I2C	2-Wire Serial, I2C	2-Wire Serial, I2C
Voltage Supply	2.4V ~ 5.5V	2.4V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	1.7V ~ 3.6V	1.7V ~ 3.6V	1.7V ~ 3.6V
Accuracy	±1°C (0°C ~ 70°C), ±2°C (-40°C ~ 150°C)	±1°C (0°C ~ 70°C), ±2°C (-40°C ~ 150°C)	±2°C (Max)	±2°C (Max)	±3°C (Max)	±3°C (Max)	±3°C (Max)	±3°C (Max)	±3°C (Max)
Product Status	Not For New Designs	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

LM95071CIMF/NOPB represents the direct equivalent with identical electrical specifications and improved compliance status (ROHS3 Compliant, REACH Unaffected). This variant is preferred for applications currently using the LM95071CIMF where product lifecycle extension is required.

For applications where the maximum operating temperature does not exceed 125°C and protocol conversion is feasible, the Analog Devices MAX6652AUB+T and Microchip MCP9844T-BE/MNY offer active product status with full RoHS3 and REACH compliance. The MAX6652 series provides ±2°C accuracy matching the LM95071CIMF specification within the 0°C to 70°C test window. The MCP9844 series operates at lower supply voltages (1.7V minimum) and includes fan control output capability.

All substitute parts listed carry ROHS3 Compliant and REACH Unaffected designations, addressing regulatory requirements that the original LM95071CIMF does not satisfy.

Frequently Asked Questions (FAQ)

Q: Can the LM95071CIMF be directly replaced with MAX6652AUB+T or MCP9844T-BE/MNY?

A: Direct replacement requires protocol conversion. The LM95071CIMF outputs data via SPI, while MAX6652AUB+T uses I2C/SMBus and MCP9844T-BE/MNY uses 2-Wire Serial/I2C. System firmware and hardware interface must be modified to accommodate the different communication protocol.

Q: What is the temperature range limitation of substitute parts?

A: All identified substitutes operate to a maximum of 125°C, compared to the LM95071CIMF maximum of 150°C. Applications requiring temperature measurement above 125°C cannot use these substitutes without design modification or alternative component selection.

Q: Are the substitute parts pin-compatible with the LM95071CIMF?

A: No. The LM95071CIMF uses SOT-23-5 packaging (5 pins). The MAX6652 series uses 10-uMAX/uSOP packaging (10 pins), and the MCP9844 series uses 8-TDFN packaging (8 pins). PCB layout and schematic redesign is required.

Q: Which substitute offers the best accuracy match to the LM95071CIMF?

A: The MAX6652AUB+T series provides ±2°C accuracy, matching the LM95071CIMF specification at -40°C to 150°C. The MAX6683 and MCP9844 series specify ±3°C accuracy maximum.

Q: What are the supply voltage differences?

A: The LM95071CIMF operates from 2.4V to 5.5V. The MAX6652 and MAX6683 series require 2.7V minimum (0.3V higher). The MCP9844 series operates from 1.7V minimum, allowing operation in lower-voltage applications.

Q: Is LM95071CIMF/NOPB a suitable alternative?

A: Yes. LM95071CIMF/NOPB is the direct functional equivalent with identical electrical specifications, improved RoHS3 compliance, and REACH Unaffected status. No design changes are required for substitution.

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