LM75AD/G-T Equivalent & Substitute Parts

Part Overview

The LM75AD/G-T is an I2C temperature sensor with integrated watchdog functionality manufactured by NXP USA Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The LM75AD/G-T operates as a digital temperature monitoring device with 2-wire serial (I2C) output capability, suitable for thermal management and monitoring applications across industrial and commercial systems.

Substiute Parts

LM75AD/G-T

NXP USA Inc.In Stock: 992LM75AD/G-T Datasheet

Current PartRFQ

MCP9844T-BE/MNY

Microchip TechnologyIn Stock: 6644MCP9844T-BE/MNY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MCP9844T-BE/MNY qualifies as a functional substitute based on the following alignment of critical parameters:

• Communication Protocol: Both devices utilize 2-Wire Serial I2C output for temperature data transmission
• Sensor Function: Both provide internal temperature sensing with digital output capability
• Temperature Range: Both operate across -40°C to 125°C
• Output Alarm Capability: Both include alarm output functionality
• Regulatory Compliance: Both maintain ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification
• Moisture Sensitivity: Both rated at MSL 1 (Unlimited)
• HTSUS Classification: Identical commodity code (8542.39.0001)

Parameter Comparison

Engineering Selection Recommendations

The MCP9844T-BE/MNY is an active product from Microchip Technology with current inventory availability (6561 units in stock), providing supply continuity for applications currently using the obsolete LM75AD/G-T. Both components maintain identical regulatory compliance profiles: ROHS3 certification, REACH Unaffected status, and EAR99 export classification. The MCP9844T-BE/MNY offers the additional advantage of documented operating specifications including temperature range (-40°C to 125°C), supply voltage range (1.7V to 3.6V), and accuracy rating (±3°C maximum). Both devices support I2C communication with alarm output functionality, meeting the core functional requirements of temperature monitoring and watchdog applications.

Frequently Asked Questions (FAQ)

Q: Can the MCP9844T-BE/MNY directly replace the LM75AD/G-T in existing designs?

A: Both devices utilize I2C communication protocol with internal temperature sensing and alarm output capability. Functional compatibility is established through matching communication interface, sensor type, and alarm functionality. Physical package differences (8-SOIC versus 8-TDFN) require PCB layout verification.

Q: What are the key differences between these two temperature sensors?

A: The MCP9844T-BE/MNY is an active product with documented specifications including ±3°C accuracy and 1.7V to 3.6V supply voltage range. The LM75AD/G-T is obsolete with limited specification data in this reference. Both maintain identical regulatory compliance and MSL ratings.

Q: Are there packaging considerations for substitution?

A: The LM75AD/G-T uses 8-SOIC packaging while the MCP9844T-BE/MNY uses 8-TDFN (2x3) with exposed pad. Pin-to-pin compatibility and footprint differences must be evaluated during design integration.

Q: Do both devices meet the same regulatory requirements?

A: Yes. Both components are ROHS3 compliant, REACH Unaffected, classified as EAR99, and share the identical HTSUS commodity code (8542.39.0001). Both maintain MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the supply voltage requirement for the MCP9844T-BE/MNY?

A: The MCP9844T-BE/MNY operates with supply voltage range of 1.7V to 3.6V. Verify compatibility with your system's power supply specifications before implementation.