LM4128DMF-3.0 Equivalent & Substitute Parts

Part Overview

The LM4128DMF-3.0 is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 3V output with ±1% tolerance in a SOT-23-5 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The LM4128DMF-3.0 provides 20 mA output current with 100 µA supply current, suitable for precision voltage reference applications across industrial and commercial temperature ranges.

Substiute Parts

LM4128DMF-3.0

Texas InstrumentsIn Stock: 1294LM4128DMF-3.0 Datasheet

Current PartRFQ

LM4128DMF-3.0/NOPB

Texas InstrumentsIn Stock: 1234LM4128DMF-3.0/NOPB Datasheet

DirectRFQ

LM4128DMFX-3.0/NOPB

Texas InstrumentsIn Stock: 1059LM4128DMFX-3.0/NOPB Datasheet

Parametric EquivalentRFQ

LM4128DQ1MF3.0/NOPB

Texas InstrumentsIn Stock: 16048LM4128DQ1MF3.0/NOPB Datasheet

Parametric EquivalentRFQ

LM4128DQ1MFX3.0/NOPB

Texas InstrumentsIn Stock: 691LM4128DQ1MFX3.0/NOPB Datasheet

Parametric EquivalentRFQ

MAX6037AAUK30+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1299MAX6037AAUK30+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM4128DMF-3.0 is determined by matching the following critical parameters: fixed 3V output voltage, SOT-23-5 package, surface mount configuration, and operating temperature range of -40°C to 125°C. Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging, differing only in product status or packaging format (Tape & Reel vs. bulk).

Parametric Equivalents provide the same core electrical performance (3V fixed output, 20 mA output current, ±1% tolerance) with identical package and mounting specifications. These parts may include automotive-grade variants with AEC-Q100 qualification.

Manufacturer Recommended Alternative offers superior electrical performance (±0.2% tolerance, 25 ppm/°C temperature coefficient, lower noise) while maintaining the same 3V output, SOT-23-5 package, and surface mount configuration. This alternative operates within compatible input voltage and temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete LM4128DMF-3.0, select LM4128DMF-3.0/NOPB, LM4128DMFX-3.0/NOPB, LM4128DQ1MF3.0/NOPB, or LM4128DQ1MFX3.0/NOPB. All four parts are active products with identical electrical specifications and SOT-23-5 packaging. The choice between these variants depends on packaging format requirements: Tape & Reel format for automated assembly (LM4128DMF-3.0/NOPB, LM4128DMFX-3.0/NOPB, LM4128DQ1MFX3.0/NOPB) or bulk format for manual handling (LM4128DQ1MF3.0/NOPB). The automotive-qualified variants (LM4128DQ1MF3.0/NOPB and LM4128DQ1MFX3.0/NOPB) carry AEC-Q100 certification and are suitable for automotive applications.

For applications requiring superior performance characteristics, the MAX6037AAUK30+T offers tighter tolerance (±0.2% vs. ±1%), lower temperature coefficient (25 ppm/°C vs. 100 ppm/°C), and significantly reduced noise (17 µVp-p vs. 285 µVp-p in the 0.1Hz to 10Hz band). The MAX6037AAUK30+T maintains the same 3V output, SOT-23-5 package, and surface mount configuration. Note that the MAX6037AAUK30+T has lower output current capability (5 mA vs. 20 mA) and higher supply current (275 µA vs. 100 µA), requiring circuit design verification for compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM4128DQ1MF3.0/NOPB be used as a direct replacement for LM4128DMF-3.0?

A: Yes. Both parts deliver identical electrical specifications: 3V fixed output, 20 mA output current, ±1% tolerance, 100 ppm/°C temperature coefficient, and operate across -40°C to 125°C. The primary difference is product status (active vs. obsolete) and packaging format (bulk vs. Tape & Reel). The automotive-qualified variant (LM4128DQ1MF3.0/NOPB) includes AEC-Q100 certification.

Q: What is the difference between LM4128DMFX-3.0/NOPB and LM4128DMF-3.0/NOPB?

A: Both parts are electrically identical with matching 3V output, 20 mA current, ±1% tolerance, and SOT-23-5 packaging. The "X" designation in LM4128DMFX-3.0/NOPB indicates extended temperature range or manufacturing process variation per Texas Instruments specifications. Both are active products supplied in Tape & Reel format.

Q: Is MAX6037AAUK30+T a suitable replacement for LM4128DMF-3.0?

A: MAX6037AAUK30+T is electrically compatible for the 3V reference output and SOT-23-5 package. However, it differs in output current (5 mA vs. 20 mA) and supply current (275 µA vs. 100 µA). Use MAX6037AAUK30+T only if your circuit design accommodates these current specifications. The superior performance characteristics (±0.2% tolerance, 25 ppm/°C temperature coefficient) make it suitable for precision applications where the lower output current is acceptable.

Q: What packaging formats are available for LM4128 series substitutes?

A: Texas Instruments LM4128 variants are available in Tape & Reel format (LM4128DMF-3.0/NOPB, LM4128DMFX-3.0/NOPB, LM4128DQ1MFX3.0/NOPB) for automated assembly and bulk format (LM4128DQ1MF3.0/NOPB) for manual handling. MAX6037AAUK30+T is supplied in Cut Tape & Digi-Reel format. Select based on your assembly process requirements.

Q: Are automotive-qualified versions available?

A: Yes. LM4128DQ1MF3.0/NOPB and LM4128DQ1MFX3.0/NOPB are automotive-grade variants with AEC-Q100 qualification. These parts maintain identical electrical specifications to the standard LM4128 variants and are suitable for automotive applications requiring qualified components.

Q: What is the RoHS compliance status of these parts?

A: LM4128DMF-3.0 is RoHS non-compliant. All active substitutes (LM4128DMF-3.0/NOPB, LM4128DMFX-3.0/NOPB, LM4128DQ1MF3.0/NOPB, LM4128DQ1MFX3.0/NOPB, and MAX6037AAUK30+T) are ROHS3 compliant.