LM95071CIMFX Equivalent & Substitute Parts

Part Overview

The LM95071CIMFX 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 operates on a 2.4V to 5.5V supply and is packaged in SOT-23-5 (SC-74A). However, this part carries a "Not For New Designs" status and is RoHS non-compliant, making equivalent or substitute components necessary for new applications and designs requiring regulatory compliance.

Key Parameters

Parameter	LM95071CIMFX
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
Product Status	Not For New Designs
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LM95071CIMFX is determined by the following critical parameters:

Direct Equivalent (Same Functionality & Package):

LM95071CIMFX/NOPB: Identical electrical specifications and package, with Active product status and ROHS3 compliance

Functional Alternatives (Different Interface & Package): Substitute parts operate within the -40°C to 125°C temperature range with I2C/SMBus or 2-Wire Serial output instead of SPI. These alternatives include:

MAX6652AUB+ and MAX6652AUB+T: ±2°C accuracy, I2C/SMBus output, 10-uMAX/uSOP package
MAX6683AUB+, MAX6683AUB+T: ±3°C accuracy, I2C/SMBus output, 10-uMAX/uSOP package
MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB: ±3°C accuracy, 2-Wire Serial/I2C output, 8-TDFN package

All substitute parts are Active status and ROHS3 compliant.

Parameter Comparison

Part Number	Manufacturer	Sensing Temperature	Output Type	Voltage Supply	Accuracy	Package	Product Status	RoHS Status
LM95071CIMFX	Texas Instruments	-40°C ~ 150°C	SPI	2.4V ~ 5.5V	±1°C / ±2°C	SOT-23-5	Not For New Designs	RoHS non-compliant
LM95071CIMFX/NOPB	Texas Instruments	-40°C ~ 150°C	SPI	2.4V ~ 5.5V	±1°C / ±2°C	SOT-23-5	Active	ROHS3 Compliant
MAX6652AUB+	Analog Devices Inc./Maxim Integrated	-40°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	±2°C	10-uMAX/uSOP	Active	ROHS3 Compliant
MAX6652AUB+T	Analog Devices Inc./Maxim Integrated	-40°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	±2°C	10-uMAX/uSOP	Active	ROHS3 Compliant
MAX6683AUB+	Analog Devices Inc./Maxim Integrated	-40°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	±3°C	10-uMAX/uSOP	Active	ROHS3 Compliant
MAX6683AUB+T	Analog Devices Inc./Maxim Integrated	-40°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	±3°C	10-uMAX/uSOP	Active	ROHS3 Compliant
MCP9844T-BE/MNY	Microchip Technology	-40°C ~ 125°C	2-Wire Serial, I2C	1.7V ~ 3.6V	±3°C	8-TDFN	Active	ROHS3 Compliant
MCP9844T-BE/MNYAA	Microchip Technology	-40°C ~ 125°C	2-Wire Serial, I2C	1.7V ~ 3.6V	±3°C	8-TDFN	Active	ROHS3 Compliant
MCP9844T-BE/MNYAB	Microchip Technology	-40°C ~ 125°C	2-Wire Serial, I2C	1.7V ~ 3.6V	±3°C	8-TDFN	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement: LM95071CIMFX/NOPB is the appropriate choice when SPI interface and SOT-23-5 package are required. This part maintains identical electrical specifications and pinout while offering Active product status and ROHS3 compliance.

For New Designs Requiring RoHS Compliance: When regulatory compliance is mandatory and interface flexibility exists, the MAX6652AUB+ or MAX6652AUB+T series provides ±2°C accuracy with I2C/SMBus output and ROHS3 compliance. These parts operate within the -40°C to 125°C range, which covers most industrial and consumer applications below 150°C.

For Cost-Optimized Alternatives: The MAX6683AUB+, MAX6683AUB+T, MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB offer Active status and ROHS3 compliance with ±3°C accuracy. These parts are suitable for applications where the extended upper temperature range of the LM95071CIMFX is not required.

For Low-Voltage Applications: The MCP9844T-BE series supports operation from 1.7V, making it suitable for battery-powered or low-voltage systems where the LM95071CIMFX minimum 2.4V supply is insufficient.

Frequently Asked Questions (FAQ)

Q: Can LM95071CIMFX/NOPB be used as a direct replacement for LM95071CIMFX? A: Yes. LM95071CIMFX/NOPB is electrically and functionally identical with the same SPI interface, SOT-23-5 package, and -40°C to 150°C temperature range. The primary differences are Active product status and ROHS3 compliance.

Q: What is the main limitation when substituting with MAX6652AUB+ or MAX6683AUB+ series? A: The upper sensing temperature limit is reduced from 150°C to 125°C, and the output interface changes from SPI to I2C/SMBus. System firmware and PCB layout must be adapted accordingly.

Q: Why do MCP9844T-BE variants have different part number suffixes? A: The suffixes indicate packaging format: MCP9844T-BE/MNY (Cut Tape & Digi-Reel), MCP9844T-BE/MNYAA (Tape & Reel), and MCP9844T-BE/MNYAB (standard packaging). Electrical specifications are identical across all variants.

Q: Is the LM95071CIMFX suitable for new product designs? A: No. The part carries "Not For New Designs" status and is RoHS non-compliant. LM95071CIMFX/NOPB or alternative parts from the MAX6652, MAX6683, or MCP9844 families are recommended for new designs.

Q: What accuracy differences exist between substitute options? A: LM95071CIMFX/NOPB maintains ±1°C accuracy (0°C ~ 70°C) and ±2°C accuracy (-40°C ~ 150°C). MAX6652AUB+ series provides ±2°C accuracy. MAX6683AUB+ and MCP9844T-BE series provide ±3°C accuracy. Selection depends on application tolerance requirements.

Q: Can MCP9844T-BE parts operate at the full -40°C to 150°C range? A: No. MCP9844T-BE series operates from -40°C to 125°C. For applications requiring temperature measurement above 125°C, LM95071CIMFX/NOPB or MAX6652AUB+ series must be used.

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