LM385M3-2.5 Equivalent & Substitute Parts

Part Overview

The LM385M3-2.5 is a shunt voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 2.5V output with ±3% tolerance. This component functions as a precision voltage reference in power management applications. The main part is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and procurement planning. Shunt voltage references are critical components in analog circuits requiring stable reference voltages for comparators, analog-to-digital converters, and precision measurement systems.

Substiute Parts

LM385M3-2.5

Texas InstrumentsIn Stock: 17588LM385M3-2.5 Datasheet

Current PartRFQ

LM385M3-2.5/NOPB

Texas InstrumentsIn Stock: 7607LM385M3-2.5/NOPB Datasheet

DirectRFQ

LM385M3X-2.5/NOPB

Texas InstrumentsIn Stock: 60977LM385M3X-2.5/NOPB Datasheet

Parametric EquivalentRFQ

LM4040C25QFTA

Diodes IncorporatedIn Stock: 23634LM4040C25QFTA Datasheet

MFR RecommendedRFQ

NCV1009DR2G

onsemiIn Stock: 23842NCV1009DR2G Datasheet

MFR RecommendedRFQ

SPX385AM-L-2-5/TR

MaxLinear, Inc.In Stock: 6636SPX385AM-L-2-5/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM385M3-2.5 is determined by the following critical parameters: fixed 2.5V output voltage, shunt reference type, 20 mA output current capability, SOT-23-3 package compatibility, and surface mount technology. Substitute parts must maintain the same output voltage and reference type to ensure functional compatibility. Package and mounting type compatibility is essential for direct board-level replacement without redesign. Tolerance, temperature coefficient, and noise specifications may vary among substitutes, provided the application requirements permit such variations. Operating temperature range differences are acceptable if the substitute covers the required operating conditions.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Same Package, Identical Electrical Characteristics):

LM385M3-2.5/NOPB and LM385M3X-2.5/NOPB are direct substitutes from Texas Instruments with identical electrical specifications. Both maintain ±3% tolerance, 150ppm/°C temperature coefficient, and 20 mA output current. LM385M3-2.5/NOPB is available in Cut Tape packaging with Active product status. LM385M3X-2.5/NOPB is available in Tape & Reel packaging with higher inventory levels (60,930 pcs). Both are ROHS3 compliant and suitable for immediate replacement without circuit modification.

Enhanced Performance Substitutes (Same Package, Improved Specifications):

SPX385AM-L-2-5/TR from MaxLinear, Inc. maintains SOT-23-3 package compatibility and 20 mA output current with improved ±1% tolerance and extended operating temperature range (-40°C ~ 85°C). This part is suitable for applications requiring tighter voltage accuracy than the original specification.

Alternative Package Substitutes (Different Package, Enhanced Specifications):

LM4040C25QFTA from Diodes Incorporated provides superior performance with ±0.5% tolerance, 100ppm/°C temperature coefficient, and extended operating temperature range (-40°C ~ 125°C). This part includes AEC-Q100 automotive qualification. The SOT-23-3 package maintains board-level compatibility, though output current is reduced to 15 mA.

NCV1009DR2G from onsemi offers the highest precision with ±0.2% tolerance and 15ppm/°C temperature coefficient, suitable for precision measurement applications. This part uses 8-SOIC packaging, requiring board redesign for implementation. Extended operating temperature range (-40°C ~ 125°C) and ROHS3 compliance are provided.

Frequently Asked Questions (FAQ)

Q: Can LM385M3-2.5/NOPB be used as a direct replacement for LM385M3-2.5?

A: Yes. LM385M3-2.5/NOPB is a direct substitute with identical electrical specifications, tolerance, temperature coefficient, and output current. The primary difference is product status (Active vs. Last Time Buy) and packaging format (Cut Tape vs. original specification). No circuit modification is required.

Q: What is the difference between LM385M3-2.5/NOPB and LM385M3X-2.5/NOPB?

A: Both parts have identical electrical specifications. The primary differences are packaging format (Cut Tape vs. Tape & Reel) and inventory availability. LM385M3X-2.5/NOPB offers significantly higher stock levels (60,930 pcs vs. 7,565 pcs).

Q: Can NCV1009DR2G replace LM385M3-2.5 without board redesign?

A: No. NCV1009DR2G uses 8-SOIC packaging instead of SOT-23-3, requiring board layout modification. However, it provides superior electrical performance with ±0.2% tolerance and 15ppm/°C temperature coefficient for applications where precision is critical.

Q: Is LM4040C25QFTA suitable for all LM385M3-2.5 applications?

A: LM4040C25QFTA maintains SOT-23-3 package compatibility and 2.5V output voltage. However, output current is reduced to 15 mA (vs. 20 mA). Applications requiring the full 20 mA output current must be evaluated for compatibility. The part offers improved tolerance (±0.5%) and extended temperature range (-40°C ~ 125°C).

Q: What are the compliance and qualification differences among substitutes?

A: All substitutes are ROHS3 compliant. LM4040C25QFTA includes AEC-Q100 automotive qualification, suitable for automotive and industrial applications. SPX385AM-L-2-5/TR is RoHS compliant without specific automotive qualification. Selection should be based on application requirements and industry standards.

Q: Which substitute offers the best temperature stability?

A: NCV1009DR2G provides the lowest temperature coefficient at 15ppm/°C typical, followed by LM4040C25QFTA at 100ppm/°C. The original LM385M3-2.5 and most direct substitutes operate at 150ppm/°C. Selection depends on application temperature stability requirements.