LM335AM Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM335AM is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across the -40°C to 100°C range with 10mV/°K output resolution. The device is packaged in 8-SOIC surface mount configuration. This part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product roadmap. Finding equivalent and substitute parts is necessary for ongoing production support, legacy system maintenance, and design flexibility when the primary part becomes unavailable.

Substiute Parts

LM335AM

Texas InstrumentsIn Stock: 1955LM335AM Datasheet

Current PartRFQ

LM335AM/NOPB

Texas InstrumentsIn Stock: 2548LM335AM/NOPB Datasheet

DirectRFQ

LM335ADT

STMicroelectronicsIn Stock: 15376LM335ADT Datasheet

DirectRFQ

LM235DT

STMicroelectronicsIn Stock: 19905LM235DT Datasheet

UpgradeRFQ

LM335DT

STMicroelectronicsIn Stock: 37979LM335DT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM335AM is determined by the following critical parameters:

• Sensor Type & Output: Must be Analog, Local with Analog Voltage output
• Temperature Range: Minimum coverage of -40°C ~ 100°C (extended ranges are acceptable as upgrades)
• Resolution: Must maintain 10mV/°K output
• Package / Case: Must be 8-SOIC (0.154", 3.90mm Width) for PCB compatibility
• Mounting Type: Must be Surface Mount
• Moisture Sensitivity Level: Must be MSL 1 (Unlimited)

Substitute parts are categorized as follows:

1. Direct Substitutes: Identical electrical and mechanical specifications
2. Upgrade Substitutes: Extended temperature range or improved accuracy while maintaining core compatibility
3. Manufacturer-Recommended Substitutes: Actively supported alternatives with enhanced performance characteristics

Parameter Comparison

Engineering Selection Recommendations

LM335AM/NOPB (Direct Substitute - Texas Instruments) This part maintains identical electrical and mechanical specifications to the LM335AM. It is classified as Obsolete but offers ROHS3 compliance, making it suitable for legacy system support where RoHS compliance is required. Use this substitute when maintaining existing Texas Instruments-based designs.

LM335ADT (Direct Substitute - STMicroelectronics) This part provides identical core specifications with Active product status and ROHS3 compliance. It is the preferred direct substitute for cross-manufacturer replacement, offering superior long-term availability and supply chain stability compared to obsolete alternatives.

LM235DT (Upgrade Substitute - STMicroelectronics) This part extends the temperature range to -40°C ~ 125°C while maintaining all other core parameters. It is classified as Active with ROHS3 compliance. Select this substitute when applications require extended high-temperature operation beyond 100°C.

LM335DT (Manufacturer-Recommended Substitute - STMicroelectronics) This part improves accuracy to ±1°C (compared to ±3°C for the LM335AM) while maintaining the -40°C ~ 100°C temperature range. It is classified as Active with ROHS3 compliance and represents the highest performance option for applications requiring enhanced measurement precision.

Frequently Asked Questions (FAQ)

Q: Can LM335ADT be used as a direct replacement for LM335AM? A: Yes. Both parts share identical sensor type, temperature range (-40°C ~ 100°C), output type (Analog Voltage), resolution (10mV/°K), accuracy (±3°C / ±5°C), and 8-SOIC package specifications. The LM335ADT is manufactured by STMicroelectronics and carries Active product status with ROHS3 compliance.

Q: What is the difference between LM335DT and LM335AM? A: The LM335DT offers improved accuracy of ±1°C compared to the LM335AM's ±3°C specification. Both maintain identical temperature range, output characteristics, and packaging. The LM335DT is the preferred choice for applications requiring higher measurement precision.

Q: When should LM235DT be selected instead of LM335AM? A: Select LM235DT when the application requires temperature measurement above 100°C, as it extends the operating range to -40°C ~ 125°C. All other electrical and mechanical parameters remain compatible with LM335AM.

Q: Are all substitute parts RoHS compliant? A: The LM335AM is RoHS non-compliant. All listed substitutes (LM335AM/NOPB, LM335ADT, LM235DT, and LM335DT) are ROHS3 compliant, making them suitable for applications with RoHS compliance requirements.

Q: Is the 8-SOIC package identical across all listed parts? A: Yes. All parts use the 8-SOIC (0.154", 3.90mm Width) package with Surface Mount configuration, ensuring PCB layout and assembly compatibility.

Q: What is the product status significance for part selection? A: LM335AM is "Not For New Designs" and LM335AM/NOPB is "Obsolete," indicating limited future availability. LM335ADT, LM235DT, and LM335DT are classified as "Active," ensuring long-term supply chain support and continued manufacturing.