LM431ACM3X Equivalent & Substitute Parts

Part Overview

The LM431ACM3X is a shunt voltage reference IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This adjustable reference device operates with a fixed output voltage of 2.495V and supports maximum output voltage up to 37V, delivering 100mA output current with ±2.2% tolerance. The part is currently in Last Time Buy status, indicating limited availability. Alternative equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain flexibility for applications requiring shunt voltage reference functionality in SOT-23-3 packaging.

Substiute Parts

LM431ACM3X

Texas InstrumentsIn Stock: 26697LM431ACM3X Datasheet

Current PartRFQ

LM431ACM3/NOPB

Texas InstrumentsIn Stock: 8835LM431ACM3/NOPB Datasheet

Parametric EquivalentRFQ

LM431ACM3X/NOPB

Texas InstrumentsIn Stock: 26330LM431ACM3X/NOPB Datasheet

Parametric EquivalentRFQ

AS431HMBNTR-G1

Diodes IncorporatedIn Stock: 4050AS431HMBNTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM431ACM3X is determined by the following critical parameters:

Primary Substitution Criteria:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V
• Package / Case: SOT-23-3
• Current - Output: 100mA

Secondary Compatibility Factors:

• Tolerance specification (±2.2% or better)
• Operating temperature range (minimum 0°C ~ 70°C)
• RoHS3 compliance
• MSL rating of 1 or better

The substitute parts identified maintain identical or superior electrical characteristics within the specified parameter ranges, ensuring functional compatibility in applications designed for the LM431ACM3X.

Parameter Comparison

Engineering Selection Recommendations

LM431ACM3/NOPB (Texas Instruments) This part is a parametric equivalent to the LM431ACM3X with identical electrical specifications. Product status is Active, ensuring continued availability and supply chain stability. Packaging is Cut Tape (CT) & Digi-Reel®. This part is recommended as the primary substitute for the LM431ACM3X due to matching specifications and active manufacturing status.

LM431ACM3X/NOPB (Texas Instruments) This part maintains identical electrical and mechanical specifications to the main part LM431ACM3X. Product status is Active with higher inventory availability (26,263 pcs). Packaging is Cut Tape (CT) & Digi-Reel®. This represents the most direct substitute with no parameter deviations.

AS431HMBNTR-G1 (Diodes Incorporated) This part is a manufacturer-recommended alternative from Diodes Incorporated. It provides superior performance characteristics: tighter tolerance (±1% vs ±2.2%), lower temperature coefficient (20ppm/°C vs 50ppm/°C), and extended operating temperature range (-40°C ~ 125°C vs 0°C ~ 70°C). Maximum output voltage is 36V (1V lower than the main part). Current - Cathode is 500µA (lower than 1mA). Packaging is Tape & Reel (TR). This part is suitable for applications requiring enhanced accuracy and wider temperature operation, provided the 36V maximum output voltage is acceptable.

All substitute parts maintain ROHS3 compliance and MSL rating of 1, ensuring regulatory and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM431ACM3/NOPB directly replace LM431ACM3X in production? A: Yes. LM431ACM3/NOPB is a parametric equivalent with identical electrical specifications (2.495V output, ±2.2% tolerance, 100mA output current, SOT-23-3 package). The primary difference is packaging format (Cut Tape & Digi-Reel® vs the original packaging) and active product status versus Last Time Buy status.

Q: What are the key differences between LM431ACM3X/NOPB and AS431HMBNTR-G1? A: Both maintain the same 2.495V output voltage and 100mA output current in SOT-23-3 packaging. AS431HMBNTR-G1 offers tighter tolerance (±1% vs ±2.2%), lower temperature coefficient (20ppm/°C vs 50ppm/°C), and wider operating temperature range (-40°C ~ 125°C vs 0°C ~ 70°C). However, AS431HMBNTR-G1 has a maximum output voltage of 36V compared to 37V, and lower cathode current (500µA vs 1mA). Selection depends on application requirements for accuracy and temperature range.

Q: Are all substitute parts RoHS3 compliant? A: Yes. LM431ACM3/NOPB, LM431ACM3X/NOPB, and AS431HMBNTR-G1 are all ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the original LM431ACM3X.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging? A: Both are surface mount tape formats suitable for automated assembly. Cut Tape (CT) & Digi-Reel® provides flexibility for smaller quantities and mixed component orders. Tape & Reel (TR) is optimized for high-volume production runs. Component functionality and electrical performance are identical; packaging format selection depends on production volume and assembly process requirements.

Q: Can AS431HMBNTR-G1 be used in applications requiring 37V maximum output? A: No. AS431HMBNTR-G1 has a maximum output voltage specification of 36V. Applications requiring the full 37V output capability must use LM431ACM3X, LM431ACM3/NOPB, or LM431ACM3X/NOPB.

Q: Why is LM431ACM3X marked as Last Time Buy? A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number variant. Substitute parts with Active status (LM431ACM3/NOPB and LM431ACM3X/NOPB) ensure long-term supply chain continuity for new designs and production requirements.