LPC660AIM Equivalent & Substitute Parts

Part Overview

The LPC660AIM is a CMOS operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The LPC660AIM provides push-pull, rail-to-rail output configuration suitable for low-power CMOS amplifier applications across industrial and consumer electronics.

Substiute Parts

LPC660AIM

Texas InstrumentsIn Stock: 1146LPC660AIM Datasheet

Current PartRFQ

LPC660AIM/NOPB

Texas InstrumentsIn Stock: 3074LPC660AIM/NOPB Datasheet

DirectRFQ

MAX4395ESD+

Analog Devices Inc./Maxim IntegratedIn Stock: 9449MAX4395ESD+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPC660AIM is determined by the following critical parameters:

Mechanical Compatibility: Package type (14-SOIC), mounting type (surface mount), and physical dimensions must match exactly to ensure PCB compatibility without layout redesign.

Electrical Compatibility: Number of circuits (4), output configuration (push-pull, rail-to-rail), and supply voltage range (4.75V to 15.5V) establish the functional baseline. Substitute parts must operate within these voltage specifications.

Performance Characteristics: Slew rate, gain bandwidth product, input bias current, and input offset voltage define the signal processing capability. Substitutes may exceed these specifications without functional degradation.

Compliance & Status: RoHS compliance and product status (active vs. obsolete) determine long-term availability and regulatory suitability for new designs.

Two substitute categories are identified:

Direct Equivalent: LPC660AIM/NOPB maintains identical electrical specifications and package configuration, differing only in packaging format (tube) and RoHS compliance status.

Functional Alternative: MAX4395ESD+ provides equivalent package and circuit count with enhanced performance characteristics (higher slew rate, greater output current, wider bandwidth), suitable for applications requiring improved signal fidelity.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Specification-Matched):

LPC660AIM/NOPB is the appropriate selection when exact electrical and performance characteristics are required. This part maintains identical specifications to the LPC660AIM while offering improved product status (Last Time Buy vs. Obsolete) and ROHS3 compliance. Packaging format differs (tube vs. standard), but electrical performance and pinout remain unchanged. This substitution requires no circuit redesign.

For Enhanced Performance Applications:

MAX4395ESD+ is suitable when application requirements permit performance enhancement. This part provides significantly improved slew rate (500V/µs vs. 0.11V/µs), higher output current capability (95mA vs. 40mA per channel), and active product status with full ROHS3 compliance. Supply voltage range differs (4.5V–11V single supply or ±2.25V–±5.5V dual supply vs. 4.75V–15.5V), requiring verification of circuit power supply compatibility. The MAX4395ESD+ is optimized for video and high-speed signal applications where bandwidth and slew rate are critical.

Compliance Considerations:

Both substitute parts meet ROHS3 compliance requirements, addressing regulatory requirements for new designs. The original LPC660AIM is RoHS non-compliant and unsuitable for applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can LPC660AIM/NOPB be used as a direct drop-in replacement for LPC660AIM?

A: Yes. LPC660AIM/NOPB is electrically and mechanically identical to LPC660AIM. Both parts share the same pinout, package (14-SOIC), and electrical specifications. The primary differences are packaging format (tube) and RoHS compliance status. No circuit modifications are required.

Q: What are the key differences between LPC660AIM and MAX4395ESD+?

A: Both parts feature four circuits in 14-SOIC packages with rail-to-rail output. MAX4395ESD+ provides superior performance: slew rate of 500V/µs (vs. 0.11V/µs), output current of 95mA per channel (vs. 40mA), and -3dB bandwidth of 85MHz. However, MAX4395ESD+ operates at lower supply voltages (4.5V–11V single or ±2.25V–±5.5V dual) compared to LPC660AIM (4.75V–15.5V). Circuit power supply compatibility must be verified before substitution.

Q: Is MAX4395ESD+ suitable for low-power applications?

A: MAX4395ESD+ is optimized for higher-performance, higher-speed applications. Supply current is significantly lower (6µA vs. 160µA for LPC660AIM), making it suitable for power-constrained designs. However, the higher slew rate and bandwidth indicate this device is designed for video and signal conditioning applications rather than general-purpose low-power amplification.

Q: What is the significance of "Last Time Buy" status for LPC660AIM/NOPB?

A: Last Time Buy status indicates the manufacturer will accept orders for a limited period before discontinuing production. This part has higher current inventory (2965 pcs) compared to the obsolete LPC660AIM (1126 pcs), providing a transition window for design migration. After the Last Time Buy period expires, this part will become unavailable.

Q: Are all three parts (LPC660AIM, LPC660AIM/NOPB, MAX4395ESD+) pin-compatible?

A: LPC660AIM and LPC660AIM/NOPB are pin-compatible. MAX4395ESD+ shares the same 14-SOIC package and pinout, making it mechanically compatible. However, electrical performance differences (particularly slew rate and supply current) may require circuit validation before substitution.

Q: Which substitute part should be selected for new designs?

A: For new designs, MAX4395ESD+ is recommended due to active product status, full ROHS3 compliance, and superior performance characteristics. LPC660AIM/NOPB is appropriate for legacy design support during the Last Time Buy period. The original LPC660AIM should not be selected for new designs due to obsolete status and RoHS non-compliance.