LM348NS Equivalent & Substitute Parts

Part Overview

The LM348NS is a general-purpose operational amplifier featuring four independent circuits in a single-ended output configuration. Manufactured by Texas Instruments, this device is classified as a Last Time Buy product, indicating discontinued production with limited remaining inventory of 3300 pieces. The LM348NS is housed in a 14-SOIC surface-mount package and operates across a wide supply voltage range of 8V to 36V, making it suitable for diverse analog signal processing applications requiring moderate bandwidth and low input bias current characteristics.

The necessity to identify equivalent and substitute parts arises from the Last Time Buy status of the LM348NS. As original inventory depletes, alternative components with identical or superior electrical and mechanical specifications become essential for design continuity and long-term production planning.

Substiute Parts

LM348NS

Texas InstrumentsIn Stock: 3378LM348NS Datasheet

Current PartRFQ

LM348DR

Texas InstrumentsIn Stock: 24031LM348DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM348NS is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish the substitution criteria:

Electrical Parameters:

• Amplifier Type: General Purpose
• Number of Circuits: 4
• Slew Rate: 0.5 V/µs
• Gain Bandwidth Product: 1 MHz
• Current - Input Bias: 30 nA
• Voltage - Input Offset: 1 mV
• Current - Supply: 2.4 mA
• Current - Output / Channel: 25 mA
• Voltage - Supply Span: 8V to 36V
• Operating Temperature: 0°C to 70°C

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: 14-SOIC
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The LM348DR qualifies as a direct substitute based on complete alignment with these parameters across both electrical performance and physical packaging specifications.

Parameter Comparison

Engineering Selection Recommendations

The LM348DR is the qualified substitute for the LM348NS based on complete electrical and mechanical parameter equivalence. Both devices share identical core specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range.

Product Status Consideration: The LM348NS carries a Last Time Buy designation with limited inventory of 3300 pieces. The LM348DR maintains Active product status with significantly higher inventory availability of 23947 pieces, ensuring long-term supply continuity and design sustainability.

Compliance and Certification: Both components maintain ROHS3 compliance and identical Moisture Sensitivity Level 1 (Unlimited) ratings, satisfying regulatory and environmental requirements without modification to existing designs.

Package Compatibility: Both devices utilize 14-SOIC surface-mount packaging. While the LM348DR features a slightly narrower body width (3.90mm versus 5.30mm), this represents a physical refinement within the same package family and does not affect electrical performance or PCB layout compatibility for standard 14-SOIC footprints.

Frequently Asked Questions (FAQ)

Q: Can the LM348DR directly replace the LM348NS in existing designs?

A: Yes. The LM348DR provides complete electrical equivalence across all specified parameters including slew rate, bandwidth, bias current, offset voltage, supply current, output current, and operating temperature range. Both devices are manufactured by Texas Instruments and share identical 14-SOIC surface-mount packaging.

Q: What is the significance of the Last Time Buy status on the LM348NS?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the LM348NS. Existing inventory of 3300 pieces will be depleted without replenishment. The LM348DR, with Active product status and 23947 pieces in stock, provides a sustainable alternative for ongoing production requirements.

Q: Are there physical differences between the LM348NS and LM348DR packages?

A: Both devices use 14-SOIC surface-mount packaging. The LM348DR features a body width of 3.90mm compared to the LM348NS at 5.30mm. This represents a standard package refinement and does not affect compatibility with conventional 14-SOIC PCB footprints or electrical performance.

Q: Do both parts meet the same regulatory and environmental standards?

A: Yes. Both the LM348NS and LM348DR are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited) ratings, indicating identical compliance with environmental and handling requirements.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by equivalence in slew rate (0.5 V/µs), gain bandwidth product (1 MHz), input bias current (30 nA), input offset voltage (1 mV), supply current (2.4 mA), output current per channel (25 mA), and supply voltage range (8V to 36V). The LM348DR matches all these specifications.

Q: Is the LM348DR available in different packaging options?

A: The LM348DR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and high-volume production environments.