LM335MX Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM335MX is an analog local temperature sensor manufactured by Texas Instruments, designed for temperature measurement applications across the -40°C to 100°C range with 10mV/°K output resolution. The device is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The LM335MX operates as a surface-mount component in an 8-SOIC package and delivers analog voltage output suitable for direct integration into measurement and control circuits.

Substiute Parts

LM335MX

Texas InstrumentsIn Stock: 8057LM335MX Datasheet

Current PartRFQ

LM335MX/NOPB

Texas InstrumentsIn Stock: 1796LM335MX/NOPB Datasheet

DirectRFQ

LM235DT

STMicroelectronicsIn Stock: 19905LM235DT Datasheet

MFR RecommendedRFQ

LM335ADT

STMicroelectronicsIn Stock: 15376LM335ADT Datasheet

MFR RecommendedRFQ

LM335DT

STMicroelectronicsIn Stock: 37979LM335DT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM335MX are qualified based on the following critical parameters that determine functional compatibility:

• Sensor Type: Analog, Local temperature measurement
• Output Type: Analog Voltage
• Resolution: 10mV/°K
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: Must encompass or match the -40°C to 100°C requirement

Substitutes are grouped into two categories: direct equivalents from the same manufacturer (LM335 series variants) and manufacturer-recommended alternatives from STMicroelectronics (LM235 and LM335 series). All qualified substitutes maintain identical package geometry, mounting configuration, and output characteristics, ensuring pin-compatible replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

LM335MX/NOPB (Texas Instruments): Direct equivalent with identical electrical and mechanical specifications. Offers active product status and ROHS3 compliance, addressing the obsolescence of the original LM335MX while maintaining complete functional compatibility.

LM335DT (STMicroelectronics): Pin-compatible substitute with superior accuracy specification (±1°C versus ±6°C). Maintains identical temperature range (-40°C to 100°C), package geometry, and output characteristics. Active product status and ROHS3 compliance support long-term availability.

LM335ADT (STMicroelectronics): Pin-compatible substitute with improved accuracy (±3°C) and active product status. Identical temperature range and package specifications ensure direct replacement capability with enhanced measurement precision.

LM235DT (STMicroelectronics): Extended temperature range variant (-40°C to 125°C) with improved accuracy (±3°C). Pin-compatible in 8-SOIC package. Suitable for applications requiring operation beyond 100°C or enhanced measurement accuracy within the standard range.

All substitute parts maintain REACH Unaffected status and identical MSL rating (1 - Unlimited), ensuring compatibility with standard handling and storage procedures.

Frequently Asked Questions (FAQ)

Q: Can LM335MX/NOPB be used as a direct replacement for LM335MX?

A: Yes. LM335MX/NOPB is a direct equivalent with identical sensor type, temperature range, resolution, accuracy, and 8-SOIC package configuration. The primary difference is product status (Active versus Obsolete) and RoHS compliance (ROHS3 Compliant).

Q: What is the difference between LM335DT and LM335ADT?

A: Both are STMicroelectronics LM335 variants with identical temperature range (-40°C to 100°C) and 8-SOIC packaging. LM335DT offers superior accuracy (±1°C) compared to LM335ADT (±3°C). Selection depends on measurement precision requirements.

Q: Is LM235DT compatible with circuits designed for LM335MX?

A: LM235DT is pin-compatible in the 8-SOIC package and maintains identical output type (Analog Voltage) and resolution (10mV/°K). The extended temperature range (-40°C to 125°C) and improved accuracy (±3°C) make it suitable for LM335MX replacement. Applications operating only within -40°C to 100°C will function identically.

Q: Why should I choose a substitute part over the original LM335MX?

A: The LM335MX is classified as obsolete. Active substitute parts ensure long-term procurement availability, supply chain stability, and access to current manufacturing processes. All recommended substitutes offer ROHS3 compliance and improved or equivalent accuracy specifications.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in 8-SOIC (0.154", 3.90mm Width) surface-mount packages with identical pin configurations, enabling direct PCB replacement without layout modifications.

Q: What is the impact of accuracy differences between substitute options?

A: Accuracy specifications define measurement error at 25°C test condition. LM335DT (±1°C) provides the highest precision, while LM335MX/NOPB and LM335ADT offer ±6°C and ±3°C respectively. Selection should align with application tolerance requirements.