LM334SMX Equivalent & Substitute Parts

Part Overview

The LM334SMX is a current source regulator IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component in 8-SOIC surface mount packaging. This adjustable current source device operates across a 1V to 40V input voltage range with ±6% accuracy and supports operating temperatures from 0°C to 70°C. The LM334SMX is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring current source functionality.

Substiute Parts

LM334SMX

Texas InstrumentsIn Stock: 2180LM334SMX Datasheet

Current PartRFQ

LM334MX/NOPB

Texas InstrumentsIn Stock: 24302LM334MX/NOPB Datasheet

Parametric EquivalentRFQ

LM334SMX/NOPB

Texas InstrumentsIn Stock: 1842LM334SMX/NOPB Datasheet

Parametric EquivalentRFQ

LM334S8#PBF

Analog Devices Inc.In Stock: 1754LM334S8#PBF Datasheet

MFR RecommendedRFQ

LM334S8#TRPBF

Analog Devices Inc.In Stock: 753LM334S8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM334SMX are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• Package Compatibility: All substitutes maintain the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and thermal compatibility
• Input Voltage Range: Substitutes operate within the specified 1V to 40V input voltage window
• Operating Temperature: All parts support the 0°C to 70°C operating temperature range
• Regulatory Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status
• Base Product Number: All parts share the LM334 base product number, indicating functional equivalence within the LM334 family

Substitutes are categorized as either Parametric Equivalents (Texas Instruments LM334 variants with identical accuracy specifications) or Manufacturer Recommended alternatives (Analog Devices LM334 variants with different output current specifications).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Texas Instruments LM334 Family)

LM334MX/NOPB and LM334SMX/NOPB are direct parametric equivalents to the LM334SMX. Both maintain identical electrical specifications (±6% accuracy, 1V to 40V input range, adjustable output current) and package compatibility. These parts are in Active product status, providing long-term supply availability. Selection between these variants depends on packaging requirements: LM334MX/NOPB is available in Cut Tape and Digi-Reel packaging, while LM334SMX/NOPB is supplied in Tape & Reel format.

Manufacturer Recommended Alternatives (Analog Devices LM334 Family)

LM334S8#PBF and LM334S8#TRPBF are Analog Devices implementations of the LM334 current source. These parts maintain package compatibility and operating temperature range but differ in output current specification (fixed 10mA versus adjustable) and input voltage minimum (0.8V versus 1V). These alternatives are suitable for applications where fixed 10mA output current meets design requirements. LM334S8#PBF is supplied in Tube packaging, while LM334S8#TRPBF is available in Tape & Reel format.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original LM334SMX specification.

Frequently Asked Questions (FAQ)

Q: Can LM334MX/NOPB directly replace LM334SMX in my design?

A: Yes. LM334MX/NOPB is a parametric equivalent with identical accuracy (±6%), input voltage range (1V to 40V), adjustable output current, operating temperature range (0°C to 70°C), and 8-SOIC package. The primary difference is packaging format (Cut Tape/Digi-Reel versus standard packaging). Electrical performance and pinout are equivalent.

Q: What is the difference between the Texas Instruments and Analog Devices LM334 variants?

A: Texas Instruments LM334SMX, LM334MX/NOPB, and LM334SMX/NOPB feature adjustable output current with ±6% accuracy and 1V minimum input voltage. Analog Devices LM334S8#PBF and LM334S8#TRPBF provide fixed 10mA output current with 0.8V minimum input voltage. Both maintain the same 8-SOIC package and operating temperature range. Selection depends on whether your application requires adjustable or fixed current output.

Q: Are all substitutes available in the same package?

A: All substitutes use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical compatibility. However, packaging formats differ: LM334MX/NOPB is available in Cut Tape and Digi-Reel, LM334SMX/NOPB in Tape & Reel, LM334S8#PBF in Tube, and LM334S8#TRPBF in Tape & Reel. Select based on your assembly process requirements.

Q: Why is the LM334SMX marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this specific part number variant. Parametric equivalents LM334MX/NOPB and LM334SMX/NOPB remain in Active status and provide continuity for new designs and ongoing production.

Q: Do all substitutes meet the same compliance standards?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original LM334SMX. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all variants.