LM92CIM Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM92CIM is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across a -55°C to 150°C range with 12-bit resolution and I2C output interface. The device is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Finding equivalent substitute parts is necessary for applications requiring continued support, inventory replenishment, or design updates to active product lines.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM92CIM
Manufacturer	Texas Instruments
Category	Temperature Sensors
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 150°C
Output Type	I2C
Resolution	12 bits
Voltage Supply	2.7V ~ 5.5V
Accuracy	±0.33°C (±1.5°C)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Features	Output Switch, Programmable Limit, Shutdown Mode
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the LM92CIM is determined by the following critical parameters:

Primary Compatibility Criteria:

Output interface type (I2C serial communication)
Temperature measurement capability (local sensing)
Supply voltage range compatibility
Package form factor and mounting type
Resolution and accuracy specifications

Substitution Categories:

Direct Equivalent (Same Manufacturer): LM92CIM/NOPB is a direct Texas Instruments variant with identical electrical specifications and 8-SOIC packaging. This part maintains full compatibility with LM92CIM designs.

Cross-Manufacturer Alternatives: The MCP9844T series (Microchip Technology) provides I2C-based temperature monitoring with internal sensor capability. These parts operate within different temperature and voltage ranges, requiring design evaluation for specific application requirements.

Parameter Comparison

Parameter	LM92CIM	LM92CIM/NOPB	MCP9844T-BE/MNY	MCP9844T-BE/MNYAA	MCP9844T-BE/MNYAB
Manufacturer	Texas Instruments	Texas Instruments	Microchip Technology	Microchip Technology	Microchip Technology
Sensor Type	Digital, Local	Digital, Local	Internal	Internal	Internal
Sensing Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Output Type	I2C	I2C	2-Wire Serial, I2C	2-Wire Serial, I2C	2-Wire Serial, I2C
Resolution	12 bits	12 bits	Not specified	Not specified	Not specified
Voltage Supply	2.7V ~ 5.5V	2.7V ~ 5.5V	1.7V ~ 3.6V	1.7V ~ 3.6V	1.7V ~ 3.6V
Accuracy	±0.33°C (±1.5°C)	±0.33°C (±1.5°C)	±3°C (Max)	±3°C (Max)	±3°C (Max)
Package / Case	8-SOIC	8-SOIC	8-TDFN (2x3)	8-TDFN (2x3)	8-TDFN (2x3)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Not For New Designs	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: LM92CIM/NOPB is the appropriate choice when maintaining existing designs. This part is electrically and mechanically identical to LM92CIM, with improved RoHS3 compliance status and active inventory availability.

For New Designs or Extended Temperature Range Requirements: The MCP9844T series (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) represents active product alternatives from Microchip Technology. These parts feature:

Active product status suitable for new designs
Full RoHS3 and REACH compliance
I2C interface compatibility with LM92CIM
Reduced supply voltage range (1.7V ~ 3.6V versus 2.7V ~ 5.5V)
Narrower operating temperature range (-40°C ~ 125°C versus -55°C ~ 150°C)
Lower accuracy specification (±3°C versus ±0.33°C)

Selection between MCP9844T variants (MNY, MNYAA, MNYAB) depends on packaging requirements: Cut Tape & Digi-Reel for MNY, Tape & Reel for MNYAA and MNYAB.

Frequently Asked Questions (FAQ)

Q: Can MCP9844T series parts directly replace LM92CIM in existing designs?

A: MCP9844T parts share I2C interface compatibility but differ in critical specifications. The MCP9844T operates at -40°C to 125°C (versus -55°C to 150°C for LM92CIM) and has ±3°C accuracy (versus ±0.33°C). Applications requiring the full -55°C to 150°C range or ±0.33°C accuracy cannot use MCP9844T without design modification.

Q: What is the difference between LM92CIM and LM92CIM/NOPB?

A: Both parts are electrically and mechanically identical with 8-SOIC packaging and identical electrical specifications. The primary difference is product status and compliance: LM92CIM is "Not For New Designs" with RoHS non-compliant status, while LM92CIM/NOPB is "Obsolete" with ROHS3 compliance.

Q: Are MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB functionally equivalent?

A: These three MCP9844T variants are functionally identical. Differences exist only in packaging format: MNY uses Cut Tape & Digi-Reel, while MNYAA and MNYAB use Tape & Reel configurations. Selection depends on procurement and assembly requirements.

Q: What are the package differences between LM92CIM and MCP9844T substitutes?

A: LM92CIM uses 8-SOIC (0.154", 3.90mm width) packaging, while MCP9844T uses 8-TDFN (2x3) with exposed pad. These are different form factors requiring PCB layout modifications and different footprints.

Q: Which substitute part is recommended for new product designs?

A: MCP9844T series parts (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) carry "Active" product status and full RoHS3 compliance, making them suitable for new designs. Selection among the three variants depends on packaging and supply chain requirements.

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