LM4140BCM-1.2 Equivalent & Substitute Parts

Part Overview

The LM4140BCM-1.2 is a Series Voltage Reference IC from Texas Instruments, designed to provide a fixed 1.25V output with ±0.1% tolerance. This component is classified as a Power Management (PMIC) device and is housed in an 8-SOIC surface mount package. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

LM4140BCM-1.2

Texas InstrumentsIn Stock: 1831LM4140BCM-1.2 Datasheet

Current PartRFQ

LM4140BCM-1.2/NOPB

Texas InstrumentsIn Stock: 839LM4140BCM-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM4140BCM-1.2 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 1.25V
• Output current capability of 8 mA
• Tolerance specification of ±0.1%
• Temperature coefficient of 6 ppm/°C
• Input voltage range of 1.8V ~ 5.5V
• 8-SOIC surface mount package
• Series reference type with fixed output configuration

The substitute part LM4140BCM-1.2/NOPB meets all these criteria identically, with the primary distinction being product status (Active vs. Obsolete) and RoHS compliance level.

Parameter Comparison

Engineering Selection Recommendations

The LM4140BCM-1.2/NOPB is a direct functional equivalent to the LM4140BCM-1.2. All electrical and mechanical parameters are identical. The primary advantages of selecting the LM4140BCM-1.2/NOPB are:

• Active product status ensures continued availability and manufacturing support
• ROHS3 compliance meets current environmental and regulatory requirements
• Identical pin configuration and package footprint enable direct PCB substitution without layout modifications

For applications requiring the obsolete LM4140BCM-1.2, the LM4140BCM-1.2/NOPB provides complete electrical and mechanical compatibility with improved compliance status.

Frequently Asked Questions (FAQ)

Q: Can the LM4140BCM-1.2/NOPB be used as a direct replacement for the LM4140BCM-1.2?

A: Yes. All electrical specifications, output voltage, current ratings, tolerance, temperature coefficient, and package dimensions are identical. No circuit modifications or PCB redesign is required.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" designation indicates the part is supplied in Tube packaging and meets ROHS3 compliance standards. The core device functionality remains unchanged.

Q: Are there any differences in pin configuration between these parts?

A: No. Both parts use the 8-SOIC package with identical pin assignments and electrical characteristics.

Q: Why is the original LM4140BCM-1.2 listed as obsolete?

A: Product obsolescence is determined by the manufacturer. The LM4140BCM-1.2/NOPB remains in active production and is the recommended source for new designs and production orders.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical performance. Both parts deliver identical functional characteristics.

Q: What is the input voltage operating range for these parts?

A: Both parts operate with input voltages from 1.8V to 5.5V, supporting a wide range of power supply configurations.

Q: Are these parts suitable for high-precision applications?

A: Yes. Both parts provide ±0.1% tolerance and 6 ppm/°C temperature coefficient, meeting precision voltage reference requirements in analog and mixed-signal circuits.