LM83CIMQAX Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM83CIMQAX is a digital temperature sensor manufactured by Texas Instruments, designed for local and remote temperature monitoring applications. It operates across a -40°C to 125°C range with 7-bit resolution and communicates via I2C/SMBus interface. The device is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

Substiute Parts

LM83CIMQAX

Texas InstrumentsIn Stock: 4258LM83CIMQAX Datasheet

Current PartRFQ

LM83CIMQAX/NOPB

National SemiconductorIn Stock: 3311LM83CIMQAX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM83CIMQAX are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Sensor Type: Digital, Local/Remote capability
• Temperature Range: -40°C to 125°C (both local and remote sensing)
• Output Interface: I2C/SMBus protocol
• Supply Voltage: 3V to 3.6V
• Resolution: 7-bit
• Accuracy: ±3°C to ±4°C across operating range
• Package: 16-SSOP surface mount configuration
• Features: Output Switch and Programmable Limit functionality

Only components matching all these parameters are classified as direct substitutes. Variations in any parameter disqualify a part from this category.

Parameter Comparison

Engineering Selection Recommendations

The LM83CIMQAX/NOPB serves as a direct functional equivalent to the LM83CIMQAX. Both components share identical electrical specifications, temperature operating ranges, communication protocols, and package configurations. The primary distinction is product status: the original LM83CIMQAX is discontinued at DiGi Electronics, while the LM83CIMQAX/NOPB maintains active availability through National Semiconductor.

For new designs or component replenishment, the LM83CIMQAX/NOPB is the appropriate selection. Both parts are based on the LM83 core architecture and maintain full pin and functional compatibility. The NOPB designation indicates lead-free packaging compliance, which aligns with modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the LM83CIMQAX/NOPB directly replace the LM83CIMQAX in existing designs?

A: Yes. Both components are electrically and mechanically identical. They share the same 16-SSOP package footprint, I2C/SMBus interface, temperature sensing range, and accuracy specifications. No circuit modifications are required.

Q: What does the NOPB suffix indicate?

A: NOPB designates "No Plumbum" (lead-free) packaging. This indicates compliance with lead-free soldering requirements and RoHS directives for modern manufacturing processes.

Q: Are there differences in temperature accuracy between these parts?

A: No. Both the LM83CIMQAX and LM83CIMQAX/NOPB maintain ±3°C accuracy across 0°C to 85°C and ±4°C accuracy across the full -40°C to 125°C operating range.

Q: Can these sensors measure both local and remote temperatures simultaneously?

A: Yes. Both components support dual-channel temperature monitoring: local sensor temperature and remote sensor temperature via external diode connection, each across the -40°C to 125°C range.

Q: What is the communication protocol for these sensors?

A: Both parts use I2C/SMBus serial interface for temperature data readout and configuration. They support programmable temperature limit thresholds and output switch functionality.

Q: Are there any supply voltage considerations for substitution?

A: No. Both components operate identically across the 3V to 3.6V supply range. Ensure your power supply design maintains this voltage window for proper sensor operation.