LM431BCM Equivalent & Substitute Parts

Part Overview

The LM431BCM is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. It provides an adjustable output voltage range from 2.495V to 37V with ±1% tolerance and supports output currents up to 100mA in an 8-SOIC surface mount package.

The LM431BCM is classified as obsolete. Locating direct replacements is necessary for new designs, production continuity, and long-term component availability. The LM431BCM/NOPB variant offers an active product status alternative with identical electrical specifications and improved compliance certifications.

Substiute Parts

LM431BCM

Texas InstrumentsIn Stock: 36165LM431BCM Datasheet

Current PartRFQ

LM431BCM/NOPB

Texas InstrumentsIn Stock: 2208LM431BCM/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM431BCM is determined by strict equivalence across the following critical parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage Range: 2.495V minimum to 37V maximum
• Current Rating: 100mA output capability
• Tolerance: ±1%
• Temperature Coefficient: 50ppm/°C Typical
• Package: 8-SOIC surface mount
• Cathode Current: 1mA minimum

The LM431BCM/NOPB is a direct substitute manufactured by Texas Instruments with identical electrical specifications. The primary distinction is product status (active vs. obsolete) and RoHS compliance certification. Both parts share the same base product number (LM431) and are pin-compatible in 8-SOIC packaging.

Parameter Comparison

Engineering Selection Recommendations

The LM431BCM/NOPB is the primary substitute for the obsolete LM431BCM. Both parts are electrically identical with matching voltage ranges, current ratings, tolerance specifications, and temperature coefficients. The LM431BCM/NOPB offers the advantage of active product status, ensuring continued availability and manufacturing support from Texas Instruments.

For new designs and production applications, the LM431BCM/NOPB is the recommended selection due to its ROHS3 compliance certification and active product lifecycle status. Existing designs using the LM431BCM can transition to the LM431BCM/NOPB without circuit modifications, as pin configuration and electrical performance are identical.

Frequently Asked Questions (FAQ)

Q: Can the LM431BCM/NOPB be used as a direct replacement for the LM431BCM?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, including voltage range (2.495V to 37V), output current (100mA), tolerance (±1%), and temperature coefficient (50ppm/°C). Pin configuration and 8-SOIC package dimensions are identical, enabling direct substitution without circuit redesign.

Q: What is the difference between LM431BCM and LM431BCM/NOPB?

A: The primary differences are product status and compliance certification. The LM431BCM is obsolete, while the LM431BCM/NOPB maintains active product status. The LM431BCM/NOPB is ROHS3 compliant, whereas the LM431BCM is RoHS non-compliant. Electrical performance and package specifications are identical.

Q: Are there packaging differences between these parts?

A: Yes. The LM431BCM is supplied in bulk packaging, while the LM431BCM/NOPB is supplied in tube packaging. This distinction affects handling and storage but does not impact electrical performance or circuit compatibility.

Q: What parameters must match for a valid substitution?

A: Critical parameters for substitution include reference type (shunt), output type (adjustable), voltage range (2.495V to 37V), output current (100mA), tolerance (±1%), temperature coefficient (50ppm/°C), and package type (8-SOIC surface mount). All these parameters must be identical for electrical and mechanical compatibility.

Q: Is the LM431BCM/NOPB suitable for new product designs?

A: Yes. The LM431BCM/NOPB is the appropriate choice for new designs. It provides active product status, ROHS3 compliance, and long-term availability from Texas Instruments, ensuring design continuity and regulatory compliance.