LM71CISDX/NOPB Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM71CISDX/NOPB 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 interface. This component operates on a supply voltage of 2.65V to 5.5V and is packaged in a 6-WSON (3x3) surface mount configuration with an exposed pad.

The LM71CISDX/NOPB is currently classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this sensor.

Substiute Parts

LM71CISDX/NOPB

Texas InstrumentsIn Stock: 1072LM71CISDX/NOPB Datasheet

Current PartRFQ

LM71CISD/NOPB

Texas InstrumentsIn Stock: 1479LM71CISD/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM71CISDX/NOPB is determined by strict equivalence across the following critical parameters:

• Sensor Type & Measurement Range: Digital local temperature sensing from -40°C to 150°C
• Output Interface: SPI communication protocol
• Electrical Specifications: Supply voltage 2.65V to 5.5V, 13-bit resolution, ±1.5°C accuracy
• Physical Package: 6-WDFN Exposed Pad (6-WSON 3x3) surface mount configuration
• Functional Features: Shutdown mode capability

The LM71CISD/NOPB meets all substitution criteria. Both parts share identical sensor specifications, output characteristics, and package geometry. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The LM71CISD/NOPB is a direct functional equivalent to the LM71CISDX/NOPB. Both components are manufactured by Texas Instruments and maintain identical electrical and thermal specifications. The LM71CISD/NOPB holds active product status, ensuring ongoing availability and manufacturer support, whereas the LM71CISDX/NOPB is obsolete.

Both parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The primary practical difference is packaging format: the LM71CISDX/NOPB is supplied in tube packaging, while the LM71CISD/NOPB is supplied in Tape & Reel format, which is standard for high-volume manufacturing and automated assembly processes.

For new designs or production transitions, the LM71CISD/NOPB is the recommended selection due to active product status and standard packaging availability.

Frequently Asked Questions (FAQ)

Q: Can the LM71CISD/NOPB directly replace the LM71CISDX/NOPB in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 6-WDFN Exposed Pad package, SPI interface, temperature range, resolution, and accuracy specifications. No circuit modifications are required.

Q: What is the difference between the two part numbers?

A: The primary difference is product lifecycle status. The LM71CISDX/NOPB is obsolete, while the LM71CISD/NOPB is active. Additionally, the LM71CISD/NOPB is supplied in Tape & Reel packaging, which is standard for automated assembly, whereas the LM71CISDX/NOPB uses tube packaging.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status.

Q: Which part should be specified for new production?

A: The LM71CISD/NOPB should be specified for new designs and production runs. Its active product status ensures long-term availability and manufacturer support.

Q: Is the 6-WSON (3x3) package compatible with existing PCB layouts?

A: Yes. Both parts use the identical 6-WDFN Exposed Pad package geometry. PCB footprints, solder pad layouts, and thermal management designs require no modification.