LMC660AIN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC660AIN is a CMOS operational amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-pin DIP package. This device delivers push-pull, rail-to-rail output capability with low input bias current and is designed for general-purpose analog signal processing applications requiring low power consumption and wide supply voltage operation.

The LMC660AIN carries an Obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LMC660AIN

Texas InstrumentsIn Stock: 1597LMC660AIN Datasheet

Current PartRFQ

LMC660AIN/NOPB

Texas InstrumentsIn Stock: 2116LMC660AIN/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LMC660AIN is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Amplifier type classification (CMOS technology)
• Quantity of independent circuits (4 channels)
• Output configuration (push-pull, rail-to-rail capability)
• Slew rate (1.1 V/µs)
• Gain bandwidth product (1.4 MHz)
• Input bias current (0.002 pA)
• Input offset voltage (1 mV)
• Supply current per channel group (1.5 mA total)
• Output current per channel (40 mA)
• Supply voltage range (4.75 V to 15.5 V)
• Operating temperature range (-40°C to 85°C)

Mechanical Equivalence Criteria:

• Package type (14-DIP)
• Pin count and pitch (0.300", 7.62mm)
• Mounting technology (through-hole)

Only parts meeting all electrical and mechanical parameters are classified as direct substitutes. Packaging format (tube, tray, or bulk) does not affect functional substitutability but may impact procurement and handling procedures.

Parameter Comparison

Engineering Selection Recommendations

LMC660AIN/NOPB is the direct functional equivalent of the LMC660AIN. Both parts are manufactured by Texas Instruments and share identical electrical specifications and mechanical packaging. The primary distinction is product lifecycle status and regulatory compliance:

The LMC660AIN carries Obsolete status, indicating end-of-life designation and potential supply discontinuation. The LMC660AIN/NOPB is classified as Last Time Buy, representing the final procurement window before complete discontinuation. This part number includes the "/NOPB" suffix, indicating lead-free, halogen-free manufacturing in compliance with ROHS3 standards.

For new designs or ongoing production requiring long-term component availability, the LMC660AIN/NOPB is the appropriate selection. Both parts maintain identical functional performance across all electrical parameters and are pin-compatible in 14-DIP through-hole applications. The packaging format difference (tube for the /NOPB variant) does not affect circuit performance or board-level integration.

Inventory availability differs between variants: LMC660AIN shows 1566 units in stock, while LMC660AIN/NOPB shows 2063 units. Selection should account for immediate availability requirements and long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Are LMC660AIN and LMC660AIN/NOPB electrically interchangeable?

A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications, including slew rate, gain bandwidth product, input bias current, output current capability, and supply voltage range. They are pin-compatible and functionally equivalent in all circuit applications.

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

A: The "/NOPB" suffix designates a lead-free, halogen-free manufacturing variant compliant with ROHS3 environmental standards. This affects manufacturing process and material composition but does not alter electrical performance or pin configuration.

Q: Why is LMC660AIN marked as Obsolete?

A: Obsolete status indicates the part has reached end-of-life and is no longer in active production. Texas Instruments has transitioned to the LMC660AIN/NOPB variant, which incorporates modern environmental compliance standards.

Q: Can I use LMC660AIN/NOPB as a direct replacement in existing designs?

A: Yes. The LMC660AIN/NOPB is a direct replacement. No circuit modifications, PCB layout changes, or firmware updates are required. Pin assignments, electrical characteristics, and package dimensions are identical.

Q: What is the difference between tube and unspecified packaging?

A: Tube packaging is a standard reel format for automated assembly processes. Unspecified packaging indicates the original part number does not specify a particular packaging format in available documentation. Both formats contain identical components; the difference is in handling and storage methodology during procurement and assembly.

Q: Should I prioritize LMC660AIN/NOPB over LMC660AIN for new procurement?

A: Yes. The LMC660AIN/NOPB is the recommended choice for new designs and ongoing production. It represents the current manufacturing variant with extended availability through the Last Time Buy period and incorporates modern environmental compliance standards.

Q: Are there any performance differences between the two part numbers?

A: No. All electrical parameters, including slew rate, bandwidth, input bias current, output current, and supply voltage specifications are identical. Performance in circuit applications is equivalent.