LM614CWMX Equivalent & Substitute Parts

Part Overview

The LM614CWMX is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, containing four independent amplifier circuits in a 16-SOIC surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability in the supply chain. The LM614CWMX operates across a wide supply voltage range of 4V to 36V with a maximum output current of 25mA per channel, making it suitable for general analog signal processing applications.

Due to its obsolete status, identifying functionally equivalent substitute components is essential for design continuity, production planning, and long-term system reliability. Substitute parts must maintain electrical compatibility across critical parameters including supply voltage range, output current capability, and thermal operating specifications.

Substiute Parts

LM614CWMX

Texas InstrumentsIn Stock: 4231LM614CWMX Datasheet

Current PartRFQ

LT1114S#PBF

Analog Devices Inc.In Stock: 1308LT1114S#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM614CWMX is determined by strict alignment of electrical and mechanical parameters. The following criteria establish functional equivalence:

Primary Substitution Criteria:

• Four independent amplifier circuits in single package
• General-purpose amplifier classification
• Surface mount 16-SOIC package configuration
• Supply voltage range compatibility (minimum 4V, maximum 36V or greater)
• Output current capability of 25mA per channel or greater
• Operating temperature range 0°C to 70°C
• RoHS3 compliance and MSL Level 1 rating

Secondary Compatibility Factors:

• Slew rate and gain bandwidth product within acceptable operational margins
• Input bias current and input offset voltage specifications
• Total supply current per four channels

The LT1114S#PBF from Analog Devices Inc. meets these substitution criteria. While certain electrical parameters differ (notably lower slew rate and improved input characteristics), the device maintains functional compatibility across all critical supply, output, and thermal specifications required for direct substitution in the LM614CWMX application space.

Parameter Comparison

Engineering Selection Recommendations

LT1114S#PBF Substitution Suitability:

The LT1114S#PBF is a direct functional substitute for the obsolete LM614CWMX. Both devices are ROHS3 compliant with MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance. The LT1114S#PBF maintains active product status with established supply chain availability, addressing the primary limitation of the LM614CWMX obsolescence.

Electrical Compatibility:

The LT1114S#PBF operates across a supply voltage range of 2V to 40V, which encompasses the LM614CWMX requirement of 4V to 36V. Output current capability remains at 25mA per channel, matching the original specification. Both devices share identical operating temperature range (0°C to 70°C) and thermal characteristics.

Performance Considerations:

The LT1114S#PBF exhibits superior input characteristics with significantly lower input bias current (0.070nA versus 10nA) and input offset voltage (0.020mV versus 5mV). These improvements enhance precision in low-signal applications. The substitute device features a lower slew rate (0.3V/µs versus 0.7V/µs) and marginally lower gain bandwidth product (750kHz versus 800kHz), which remain within acceptable operational margins for general-purpose amplifier applications.

Package Consideration:

Both devices utilize 16-SOIC surface mount packaging. The LT1114S#PBF package width is 3.90mm compared to 7.50mm for the LM614CWMX. PCB layout verification is required to confirm physical compatibility with existing footprints, though both packages maintain standard 16-SOIC pin configuration and spacing.

Frequently Asked Questions (FAQ)

Q: Can the LT1114S#PBF directly replace the LM614CWMX without circuit modifications?

A: The LT1114S#PBF is electrically compatible with the LM614CWMX across all critical parameters including supply voltage range, output current, and operating temperature. However, PCB layout verification is necessary due to package width differences (3.90mm versus 7.50mm). Pin configuration and electrical specifications are compatible for direct functional substitution.

Q: What are the key differences between these two devices?

A: The primary differences are product status (LM614CWMX is obsolete; LT1114S#PBF is active), input characteristics (LT1114S#PBF has superior input bias current and offset voltage specifications), and slew rate (LM614CWMX: 0.7V/µs; LT1114S#PBF: 0.3V/µs). Supply voltage minimum is lower for the LT1114S#PBF (2V versus 4V), providing greater flexibility in low-voltage applications.

Q: Are both devices RoHS compliant?

A: Yes, both the LM614CWMX and LT1114S#PBF are ROHS3 compliant with MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance for manufacturing and deployment.

Q: What is the significance of the lower slew rate in the LT1114S#PBF?

A: The LT1114S#PBF slew rate of 0.3V/µs is lower than the LM614CWMX specification of 0.7V/µs. For general-purpose amplifier applications operating at moderate frequencies, this difference is typically not limiting. Applications requiring high-speed transient response should evaluate specific circuit requirements against the 0.3V/µs specification.

Q: Is the LT1114S#PBF available in the same packaging format?

A: Both devices use 16-SOIC surface mount packages. The physical package width differs (3.90mm for LT1114S#PBF versus 7.50mm for LM614CWMX). Pin configuration and spacing are standard 16-SOIC format. PCB footprint compatibility must be verified before implementation.

Q: What is the supply current difference between these devices?

A: The LT1114S#PBF total supply current for four channels is 350µA compared to 450µA for the LM614CWMX. This 100µA reduction per device represents improved power efficiency, particularly beneficial in battery-powered or power-constrained applications.