LM34DMX Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM34DMX is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement applications within the 32°F to 212°F range. The device outputs an analog voltage signal with a resolution of 10mV/°F and operates from a 4V to 30V supply. The LM34DMX is classified as obsolete, which necessitates identification of active equivalent parts for continued system design and procurement. The substitute part LM34DMX/NOPB maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

LM34DMX

Texas InstrumentsIn Stock: 5645LM34DMX Datasheet

Current PartRFQ

LM34DMX/NOPB

Texas InstrumentsIn Stock: 2319LM34DMX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The LM34DMX and LM34DMX/NOPB are direct equivalents based on the following substitution criteria:

Electrical Parameters (Identical):

• Sensing temperature range: 32°F ~ 212°F
• Output type: Analog Voltage
• Resolution: 10mV/°F
• Supply voltage: 4V ~ 30V
• Accuracy: ±3°F @ 77°F
• Operating temperature: 0°C ~ 100°C

Mechanical Parameters (Identical):

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Supplier device package: 8-SOIC

Differentiating Factor: The primary distinction is packaging format: LM34DMX is supplied in standard packaging, while LM34DMX/NOPB is supplied in Tape & Reel (TR) format. Both parts share the same base product number (LM34) and are functionally interchangeable at the circuit level.

Parameter Comparison

Engineering Selection Recommendations

The LM34DMX/NOPB is the direct functional equivalent for the obsolete LM34DMX. Selection between these parts is determined by procurement and compliance requirements rather than electrical performance:

Use LM34DMX/NOPB when:

• Active product status is required for new designs or long-term availability assurance
• ROHS3 compliance is mandated by system specifications or regulatory requirements
• Tape & Reel packaging is compatible with automated assembly processes

Use LM34DMX when:

• Legacy system maintenance requires exact original part matching
• Existing inventory of the obsolete part is available and acceptable for the application

Both parts are electrically and mechanically identical, ensuring direct substitution at the circuit level without design modification.

Frequently Asked Questions (FAQ)

Q: Can LM34DMX/NOPB be used as a direct replacement for LM34DMX in existing designs?

A: Yes. The LM34DMX/NOPB is a direct functional equivalent. All electrical parameters, accuracy specifications, operating ranges, and the 8-SOIC package are identical. The only difference is packaging format (Tape & Reel versus standard) and compliance certifications.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied in Tape & Reel (TR) packaging format without lead (Pb-free), and carries ROHS3 compliance certification. The base electrical and mechanical specifications remain unchanged.

Q: Are there any circuit-level compatibility concerns when substituting these parts?

A: No. Both parts share identical pinout, package dimensions (8-SOIC, 0.154" width), supply voltage range (4V ~ 30V), output characteristics (10mV/°F), and temperature sensing range (32°F ~ 212°F). No circuit modifications are required.

Q: Why is the original LM34DMX classified as obsolete?

A: The LM34DMX is obsolete due to its RoHS non-compliant status. The LM34DMX/NOPB represents the current active product line with equivalent functionality and improved regulatory compliance.

Q: What packaging format should be selected for high-volume production?

A: The LM34DMX/NOPB in Tape & Reel format is optimized for automated assembly processes and high-volume manufacturing. Standard packaging is typically used for lower-volume or manual assembly applications.

Q: Are moisture sensitivity levels identical between these parts?

A: Yes. Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage or handling.