LM70CIMM-3 Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM70CIMM-3 is a digital local temperature sensor manufactured by Texas Instruments, designed for applications requiring temperature measurement across a -55°C to 150°C range. The device features a 10-bit resolution output via SPI interface and operates on a 2.65V to 5.5V supply voltage. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product roadmap. Identification of equivalent and substitute parts is necessary for design continuity, inventory management, and long-term product support.

Substiute Parts

LM70CIMM-3

Texas InstrumentsIn Stock: 25640LM70CIMM-3 Datasheet

Current PartRFQ

LM70CIMM-3/NOPB

Texas InstrumentsIn Stock: 16224LM70CIMM-3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM70CIMM-3 is determined by strict equivalence across the following critical parameters:

• Sensor type classification (Digital, Local)
• Temperature sensing range (-55°C ~ 150°C)
• Output protocol (SPI)
• Resolution (10 bits)
• Supply voltage range (2.65V ~ 5.5V)
• Accuracy specification (1.5°C)
• Physical package (8-VSSOP)
• Mounting technology (Surface Mount)

The substitute part LM70CIMM-3/NOPB maintains identical electrical and mechanical specifications, ensuring direct functional compatibility. Differences exist only in product status classification and regulatory compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM70CIMM-3/NOPB serves as a direct functional substitute for the LM70CIMM-3, with identical electrical performance and package specifications. Selection between these parts should be based on regulatory and compliance requirements:

The LM70CIMM-3/NOPB is preferred for applications requiring ROHS3 compliance and REACH unaffected status. This variant eliminates regulatory constraints associated with the original LM70CIMM-3, which carries REACH affected designation and RoHS non-compliant status.

Both parts share identical sensor specifications, making them interchangeable from a functional and thermal measurement perspective. The choice between them depends solely on supply chain availability, inventory status, and regulatory framework applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can LM70CIMM-3/NOPB replace LM70CIMM-3 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM70CIMM-3/NOPB provides the same temperature measurement range, resolution, accuracy, and SPI output. No circuit modifications are required.

Q: What is the difference between LM70CIMM-3 and LM70CIMM-3/NOPB?

A: The primary differences are product status and regulatory compliance. LM70CIMM-3/NOPB is ROHS3 compliant and REACH unaffected, while LM70CIMM-3 is RoHS non-compliant and REACH affected. Functional performance is identical.

Q: Are the packages identical?

A: Yes. Both parts use the 8-VSSOP package with 0.118" width and 3.00mm dimensions. PCB footprints and mounting procedures are identical.

Q: Which part should be selected for new designs?

A: Both parts carry end-of-life status. For new designs requiring this temperature sensor specification, consult Texas Instruments for current production alternatives within the LM70 series or equivalent digital temperature sensor families.

Q: Is the SPI interface identical between both parts?

A: Yes. Both parts implement identical SPI output protocol, 10-bit resolution, and communication timing. Software drivers and firmware implementations require no modification.