LM76CHMX-5 Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM76CHMX-5 is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement in the range of -20°C to 85°C with 12-bit resolution and I2C output interface. The device operates on a 4.5V to 5.5V supply and is housed in an 8-SOIC package. This part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM76CHMX-5
Sensor Type	Digital, Local
Sensing Temperature Range	-20°C ~ 85°C
Resolution	12 bits
Output Type	I2C
Supply Voltage	4.5V ~ 5.5V
Accuracy	±0.5°C (±1°C)
Package	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Features	Output Switch, Programmable Limit, Shutdown Mode
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the LM76CHMX-5 is determined by the following critical parameters: I2C output interface compatibility, local temperature sensing capability, 12-bit resolution, and surface mount packaging. The substitute parts identified fall into two categories based on these criteria:

Category 1: Direct Texas Instruments Equivalent The LM76CHMX-5/NOPB maintains identical electrical specifications and package format as the original part, differing only in product status (Active vs. Obsolete) and RoHS compliance status.

Category 2: Microchip MCP9844 Series The MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB variants provide I2C interface compatibility and internal temperature sensing with expanded operating range (-40°C ~ 125°C). These parts operate at lower supply voltages (1.7V ~ 3.6V) and are housed in 8-TDFN packages, requiring circuit board layout modifications.

Key parameters enabling substitution: I2C serial interface, internal temperature sensor, surface mount configuration, and active product status with RoHS3 compliance.

Parameter Comparison

Parameter	LM76CHMX-5	LM76CHMX-5/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
Output Type	I2C	I2C	2-Wire Serial, I2C	2-Wire Serial, I2C	2-Wire Serial, I2C
Operating Temperature	-20°C ~ 85°C	-20°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	1.7V ~ 3.6V	1.7V ~ 3.6V	1.7V ~ 3.6V
Resolution	12 bits	12 bits	Not specified	Not specified	Not specified
Accuracy	±0.5°C (±1°C)	±0.5°C (±1°C)	±3°C (Max)	±3°C (Max)	±3°C (Max)
Package	8-SOIC	8-SOIC	8-TDFN (2x3)	8-TDFN (2x3)	8-TDFN (2x3)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Recommended for Existing Designs): The LM76CHMX-5/NOPB is the preferred substitute for the obsolete LM76CHMX-5. This part maintains identical electrical specifications, package format, and pinout compatibility. The primary advantage is active product status with RoHS3 compliance, ensuring long-term availability and regulatory alignment. No circuit modifications are required.

For New Designs or Extended Temperature Range Requirements: The Microchip MCP9844T-BE series (MNY, MNYAA, MNYAB variants) provides I2C interface compatibility with expanded operating temperature range (-40°C ~ 125°C). These parts require circuit board layout modifications due to package change from 8-SOIC to 8-TDFN and supply voltage adjustment from 4.5V-5.5V to 1.7V-3.6V. Accuracy specification differs at ±3°C maximum compared to the LM76CHMX-5 specification of ±0.5°C.

All substitute options maintain RoHS3 compliance and unlimited moisture sensitivity rating, supporting modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the LM76CHMX-5/NOPB be used as a direct drop-in replacement for the LM76CHMX-5? A: Yes. The LM76CHMX-5/NOPB is electrically and mechanically identical to the LM76CHMX-5, with identical pinout, package dimensions, and electrical specifications. No circuit modifications are required.

Q: What are the key differences between the LM76CHMX-5 and the MCP9844T-BE series? A: The primary differences are package type (8-SOIC vs. 8-TDFN), supply voltage range (4.5V-5.5V vs. 1.7V-3.6V), operating temperature range (-20°C to 85°C vs. -40°C to 125°C), and accuracy specification (±0.5°C vs. ±3°C). Both maintain I2C interface compatibility.

Q: Are the MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB variants functionally equivalent? A: Yes. These three variants are functionally equivalent, differing only in packaging format (Cut Tape & Digi-Reel, Tape & Reel, and unspecified packaging respectively). Selection depends on procurement and assembly requirements.

Q: What circuit modifications are necessary when switching from LM76CHMX-5 to MCP9844T-BE series? A: Circuit board layout modifications are required due to package change from 8-SOIC to 8-TDFN (2x3). Supply voltage regulation must be adjusted from 4.5V-5.5V to 1.7V-3.6V. I2C interface connections remain compatible.

Q: Does the MCP9844T-BE series support the same features as the LM76CHMX-5? A: The MCP9844T-BE series includes output alarm and fan control features in addition to I2C output. Both device families support programmable limits and shutdown modes, though implementation details may differ.

Q: Are all substitute parts RoHS3 compliant? A: Yes. The LM76CHMX-5/NOPB and all MCP9844T-BE variants are RoHS3 compliant. The original LM76CHMX-5 is RoHS non-compliant.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message