LM335AZ Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM335AZ 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 product is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching sensor type, output characteristics, packaging, and thermal operating range parameters.

Substiute Parts

LM335AZ

Texas InstrumentsIn Stock: 1130LM335AZ Datasheet

Current PartRFQ

LM135Z

STMicroelectronicsIn Stock: 32632LM135Z Datasheet

DirectRFQ

LM335AZ

STMicroelectronicsIn Stock: 1133LM335AZ Datasheet

DirectRFQ

LM235Z

STMicroelectronicsIn Stock: 29606LM235Z Datasheet

UpgradeRFQ

LM335Z

STMicroelectronicsIn Stock: 56722LM335Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM335AZ are classified based on the following substitution criteria:

Direct Equivalents maintain identical or overlapping thermal operating ranges, matching sensor type (Analog, Local), output type (Analog Voltage), resolution (10mV/°K), and TO-92-3 packaging. These parts are pin-compatible and functionally interchangeable within the specified temperature window.

Upgrade Options extend the thermal operating range or improve accuracy specifications while maintaining all other core parameters, allowing for enhanced performance in applications requiring wider temperature coverage or tighter tolerance control.

Manufacturer-Recommended Alternatives are designated by the original manufacturer as preferred replacements, offering improved product status (Active vs. Obsolete) and compliance certifications.

Key parameters determining substitution eligibility:

• Sensor Type: Analog, Local
• Output Type: Analog Voltage
• Resolution: 10mV/°K
• Package / Case: TO-92-3
• Mounting Type: Through Hole
• Thermal Operating Range: Must encompass or exceed -40°C to 100°C

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Specifications): LM335Z is the manufacturer-recommended alternative. It maintains identical thermal operating range (-40°C to 100°C), sensor type, output characteristics, and TO-92-3 packaging as the original LM335AZ. The LM335Z offers improved accuracy (±1°C vs. ±3°C), active product status, and ROHS3 compliance, making it the preferred choice for new designs and production transitions.

For Extended Temperature Range Applications: LM135Z extends the thermal operating range to -55°C ~ 150°C while maintaining all core electrical parameters. This substitute is suitable for applications requiring operation beyond the original -40°C to 100°C specification. LM135Z is manufactured by STMicroelectronics, carries active product status, and meets ROHS3 compliance requirements.

For Enhanced Accuracy Requirements: LM235Z provides improved accuracy specification (±1.5°C) and extends the upper temperature limit to 125°C. This upgrade option is appropriate for applications demanding tighter tolerance control within the -40°C to 125°C range. LM235Z maintains all packaging and mounting specifications while offering active product status and ROHS3 compliance.

Compliance Considerations: All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, addressing regulatory requirements for new production. The original LM335AZ is RoHS non-compliant; transition to any listed substitute ensures compliance with current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can LM335Z be used as a direct replacement for LM335AZ? A: Yes. LM335Z is pin-compatible and functionally equivalent, maintaining identical thermal operating range (-40°C to 100°C), sensor type (Analog, Local), output type (Analog Voltage), resolution (10mV/°K), and TO-92-3 packaging. LM335Z offers improved accuracy and active product status.

Q: What is the difference between LM135Z and LM335Z? A: LM135Z extends the thermal operating range to -55°C ~ 150°C, compared to LM335Z at -40°C ~ 100°C. Both maintain identical sensor type, output characteristics, and resolution. LM135Z is suitable for applications requiring operation outside the standard -40°C to 100°C window.

Q: Is LM235Z compatible with LM335AZ applications? A: LM235Z is compatible for applications operating within the -40°C to 100°C range. It provides enhanced accuracy (±1.5°C) and extends the upper temperature limit to 125°C. All packaging and mounting specifications remain identical. Use LM235Z when improved accuracy is required.

Q: Are all substitute parts available in the same TO-92-3 package? A: Yes. All listed substitute parts (LM135Z, LM335AZ from STMicroelectronics, LM235Z, and LM335Z) are supplied in TO-92-3 through-hole packaging, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What compliance certifications do the substitute parts carry? A: All substitute parts are ROHS3 compliant and REACH Unaffected. The original LM335AZ is RoHS non-compliant. Transition to any substitute ensures compliance with current environmental and regulatory standards.

Q: Which substitute should be selected for new product designs? A: LM335Z is the manufacturer-recommended choice for new designs, offering active product status, improved accuracy (±1°C), ROHS3 compliance, and identical thermal operating range to the original LM335AZ.