LM334SM/NOPB Equivalent & Substitute Parts

Part Overview

The LM334SM/NOPB is a current source regulator manufactured by Texas Instruments, designed for adjustable current source applications. This 8-SOIC surface mount device operates across a wide input voltage range of 1V to 40V with ±6% accuracy and is classified as active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling design flexibility and supply chain continuity.

Substiute Parts

LM334SM/NOPB

Texas InstrumentsIn Stock: 40359LM334SM/NOPB Datasheet

Current PartRFQ

LM334M

National SemiconductorIn Stock: 3285LM334M Datasheet

Parametric EquivalentRFQ

LM334M/NOPB

Texas InstrumentsIn Stock: 26600LM334M/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM334SM/NOPB are identified based on strict equivalence across the following critical parameters:

• Functional Equivalence: Current source regulator with adjustable output
• Electrical Performance: ±6% accuracy maintained
• Operating Range: Input voltage 1V ~ 40V, operating temperature 0°C ~ 70°C
• Mechanical Compatibility: 8-SOIC surface mount package (0.154", 3.90mm Width)
• Compliance: ROHS3 compliant, MSL 1 rating, REACH unaffected status

Substitutes are grouped into two categories: direct package equivalents (8-SOIC) and base product variants (LM334 series) that maintain identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

LM334M/NOPB is the primary substitute for LM334SM/NOPB. Both parts are manufactured by Texas Instruments, share identical electrical specifications (±6% accuracy, 1V ~ 40V input range, adjustable output), maintain the same 8-SOIC package footprint, and carry equivalent compliance certifications (ROHS3, MSL 1, REACH unaffected). Product status is active for both parts, ensuring continued availability and support.

LM334M (National Semiconductor) represents a base product variant within the LM334 series. While functional equivalence as a current source regulator is established, detailed electrical parameters (accuracy, voltage range, temperature range) are not fully specified in available data. This part is suitable for applications where complete parameter documentation can be independently verified and where National Semiconductor sourcing is acceptable.

Selection between LM334M/NOPB and LM334M should prioritize LM334M/NOPB when full parameter traceability and Texas Instruments support are required. LM334M may be considered as a secondary option when supply constraints exist and equivalent performance can be independently confirmed.

Frequently Asked Questions (FAQ)

Q: Can LM334M/NOPB be used as a direct replacement for LM334SM/NOPB?

A: Yes. Both parts share identical electrical specifications (±6% accuracy, 1V ~ 40V input voltage range, adjustable current output, 0°C ~ 70°C operating temperature), the same 8-SOIC package footprint, and equivalent compliance ratings. They are manufactured by the same supplier (Texas Instruments) and carry active product status.

Q: What is the difference between LM334M/NOPB and LM334M?

A: LM334M/NOPB is the tube-packaged variant from Texas Instruments with fully documented electrical parameters. LM334M is a base product designation from National Semiconductor with limited parameter documentation in the provided data. Both function as current source regulators, but LM334M/NOPB provides complete specification traceability.

Q: Are the package dimensions identical across all substitute parts?

A: LM334SM/NOPB and LM334M/NOPB both use the 8-SOIC package (0.154", 3.90mm Width), ensuring identical PCB footprint compatibility. LM334M package specifications are not provided in the available data and should be independently verified before selection.

Q: Do all substitute parts meet the same compliance requirements?

A: LM334SM/NOPB and LM334M/NOPB are both ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected. LM334M compliance status is not fully documented and should be confirmed for regulated applications.

Q: What inventory levels are available for each part?

A: LM334SM/NOPB has 40,300 pieces in stock. LM334M/NOPB has 26,555 pieces in stock. LM334M has 3,180 pieces in stock. Inventory levels should be verified at time of procurement.