LM4140CCM-1.2 Equivalent & Substitute Parts

Part Overview

The LM4140CCM-1.2 is a Series Voltage Reference IC manufactured by Texas Instruments, designed for precision voltage reference applications requiring fixed 1.25V output with ±0.1% tolerance. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across a 1.8V to 5.5V input range with 8mA output capability in an 8-SOIC surface mount package.

Substiute Parts

LM4140CCM-1.2

Texas InstrumentsIn Stock: 2031LM4140CCM-1.2 Datasheet

Current PartRFQ

LM4140CCM-1.2/NOPB

Texas InstrumentsIn Stock: 6647LM4140CCM-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM4140CCM-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 10ppm/°C
• Noise performance (0.1Hz to 10Hz): 2.2µVp-p
• Input voltage range of 1.8V ~ 5.5V
• Supply current of 375µA
• Operating temperature range of 0°C ~ 70°C
• 8-SOIC surface mount package configuration

Only components matching all electrical and mechanical parameters qualify as direct substitutes. Packaging variants (such as tube versus alternative formats) do not affect functional equivalence when the core package type remains 8-SOIC.

Parameter Comparison

Engineering Selection Recommendations

The LM4140CCM-1.2/NOPB serves as the direct functional equivalent to the obsolete LM4140CCM-1.2. Both components are manufactured by Texas Instruments and share identical electrical specifications across all critical parameters including output voltage, current capacity, tolerance, temperature coefficient, and noise characteristics.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The LM4140CCM-1.2/NOPB maintains Active product status with ROHS3 compliance, whereas the original LM4140CCM-1.2 is classified as obsolete and RoHS non-compliant. For new designs or ongoing procurement requiring regulatory alignment with current environmental standards, the LM4140CCM-1.2/NOPB is the appropriate selection. Both parts are supplied in 8-SOIC packaging with identical pinout and footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM4140CCM-1.2/NOPB be used as a direct replacement for LM4140CCM-1.2?

A: Yes. Both components are electrically and mechanically identical across all specified parameters. The LM4140CCM-1.2/NOPB is the active production equivalent with current RoHS3 compliance.

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

A: The "/NOPB" designation indicates the component is supplied without lead (Pb) plating, reflecting RoHS3 compliance. This is a packaging and compliance variant only; electrical performance is unchanged.

Q: Are there any PCB layout or footprint differences between these parts?

A: No. Both components use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout and footprint. Direct PCB substitution is possible without layout modifications.

Q: Why is the original LM4140CCM-1.2 listed as obsolete?

A: Product obsolescence reflects Texas Instruments' lifecycle management. The LM4140CCM-1.2/NOPB represents the current production equivalent and is recommended for all new applications.

Q: What are the key parameters that must match for substitution?

A: Output voltage (1.25V), output current (8 mA), tolerance (±0.1%), temperature coefficient (10ppm/°C), input voltage range (1.8V ~ 5.5V), and 8-SOIC package configuration must all remain constant for functional equivalence.

Q: Is the packaging format (tube versus other formats) a substitution constraint?

A: Packaging format does not affect functional equivalence. The critical requirement is the 8-SOIC package type. Tube and alternative packaging formats of the same package type are interchangeable from an electrical and mechanical standpoint.