LM348D Equivalent & Substitute Parts

Part Overview

The LM348D is a general-purpose operational amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit device in a 14-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design requirements and production continuity. The LM348D operates across a supply voltage span of 44 V with a gain bandwidth product of 1 MHz and a slew rate of 0.5 V/µs, making it suitable for general-purpose amplification applications requiring moderate bandwidth and speed characteristics.

Substiute Parts

LM348D

STMicroelectronicsIn Stock: 2445LM348D Datasheet

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LM2902VDR2G

onsemiIn Stock: 45425LM2902VDR2G Datasheet

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LM324ADR2G

onsemiIn Stock: 10407LM324ADR2G Datasheet

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LM324EDR2G

onsemiIn Stock: 26061LM324EDR2G Datasheet

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LM324M

onsemiIn Stock: 2248LM324M Datasheet

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LM348D

onsemiIn Stock: 2516LM348D Datasheet

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LM348DR

Texas InstrumentsIn Stock: 24031LM348DR Datasheet

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LM348NSR

Texas InstrumentsIn Stock: 3278LM348NSR Datasheet

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MC33174VDR2G

onsemiIn Stock: 28043MC33174VDR2G Datasheet

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TL064ACDR

Texas InstrumentsIn Stock: 1648TL064ACDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM348D is determined by the following critical parameters: amplifier type (general purpose), number of circuits (4), package type (14-SOIC surface mount), gain bandwidth product (1 MHz), and operating temperature range (0°C to 70°C). Substitute parts must maintain compatibility across these core electrical and mechanical specifications.

Substitute parts are grouped into two categories:

Category 1: Direct Electrical and Mechanical Equivalents Parts that match the LM348D across slew rate (0.5 V/µs), input bias current (30 nA), input offset voltage (1 mV), output current per channel (25 mA), and supply voltage span (8 V to 36 V or 44 V). These parts are sourced from Texas Instruments and onsemi manufacturers and maintain identical or near-identical performance characteristics.

Category 2: Functional Equivalents with Extended Operating Range Parts that provide the same 4-circuit general-purpose amplifier configuration in 14-SOIC packaging but with extended operating temperature ranges (-40°C to 125°C) or enhanced performance specifications (higher slew rate, lower input bias current, or wider supply voltage compatibility). These parts are suitable for applications where the LM348D's performance envelope is acceptable but where extended environmental operating conditions or improved specifications are beneficial.

Category 3: Alternative Amplifier Types Parts that maintain the 4-circuit configuration and 14-SOIC package but employ different amplifier topologies (J-FET input stages) to provide superior input bias current characteristics and higher slew rates for specialized applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LM348DR (Texas Instruments)

The LM348DR is the preferred direct substitute for the LM348D. This part is currently in active production status, ensuring long-term availability and supply chain continuity. The LM348DR maintains identical electrical performance specifications including slew rate (0.5 V/µs), gain bandwidth product (1 MHz), input bias current (30 nA), and input offset voltage (1 mV). The package footprint is identical (14-SOIC, 0.154" width), and the operating temperature range matches the original specification (0°C to 70°C). Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited). The primary difference is the supply voltage span, where the LM348DR operates from 8 V to 36 V compared to the LM348D's 44 V specification. For applications requiring the full 44 V supply span, this limitation must be evaluated against circuit requirements.

Secondary Recommendation: LM324ADR2G (onsemi)

The LM324ADR2G is an active production alternative offering 4-circuit general-purpose amplification in the identical 14-SOIC package. This part maintains the 1 MHz gain bandwidth product and 0°C to 70°C operating temperature range. Key differences include higher input bias current (40 nA versus 30 nA), slightly higher input offset voltage (2 mV versus 1 mV), and reduced supply voltage span (3 V to 32 V). The LM324ADR2G provides higher output current per channel (40 mA versus 25 mA), which may be advantageous for certain load-driving applications. This part is ROHS3 compliant and currently in active production.

Extended Temperature Range Alternative: LM2902VDR2G (onsemi)

The LM2902VDR2G provides identical 4-circuit general-purpose amplification in the 14-SOIC package with extended operating temperature range (-40°C to 125°C). This part is suitable for applications requiring operation beyond the standard 0°C to 70°C range. The LM2902VDR2G maintains the 1 MHz gain bandwidth product and is ROHS3 compliant. Supply voltage span is 3 V to 32 V. Input bias current is 90 nA, and output current per channel is 40 mA.

Enhanced Performance Alternative: MC33174VDR2G (onsemi)

The MC33174VDR2G offers enhanced performance characteristics including higher slew rate (2.1 V/µs versus 0.5 V/µs), higher gain bandwidth product (1.8 MHz versus 1 MHz), and significantly lower input bias current (20 nA versus 30 nA). This part maintains the 4-circuit configuration in 14-SOIC packaging and supports the full 44 V supply voltage span. Operating temperature range is extended to -40°C to 125°C. This part is ROHS3 compliant and currently in active production. The MC33174VDR2G is suitable for applications where improved bandwidth, slew rate, and input bias current performance provide system-level benefits.

Specialized Alternative: TL064ACDR (Texas Instruments)

The TL064ACDR employs a J-FET input stage, providing dramatically lower input bias current (0.03 nA versus 30 nA) and higher slew rate (3.5 V/µs versus 0.5 V/µs). This part maintains the 4-circuit configuration and 14-SOIC package with 1 MHz gain bandwidth product. Operating temperature range is 0°C to 70°C. Supply voltage span is 10 V to 30 V. The TL064ACDR is ROHS3 compliant and currently in active production. This part is recommended for applications where extremely low input bias current is a critical design requirement.

Obsolete Status Consideration: LM348NSR (Texas Instruments)

The LM348NSR is classified as Last Time Buy status, indicating limited remaining availability. While this part provides identical electrical performance to the LM348DR, the Last Time Buy status indicates that production will cease and inventory will be depleted. This part should not be selected for new designs or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM348DR be used as a direct replacement for the LM348D in all applications?

A: The LM348DR is electrically equivalent to the LM348D across all critical performance parameters including slew rate, gain bandwidth product, input bias current, and input offset voltage. The primary consideration is the supply voltage span: the LM348DR operates from 8 V to 36 V, while the LM348D specification indicates 44 V. If your application requires operation at supply voltages exceeding 36 V, the LM348DR is not suitable. For applications within the 8 V to 36 V range, the LM348DR is a direct replacement. Both parts use identical 14-SOIC packaging and are ROHS3 compliant.

Q: What is the difference between the LM324ADR2G and the LM348DR?

A: Both parts are 4-circuit general-purpose amplifiers in 14-SOIC packaging with 1 MHz gain bandwidth product. The LM348DR has lower input bias current (30 nA versus 40 nA) and lower input offset voltage (1 mV versus 2 mV), making it more precise for low-bias applications. The LM348DR has lower output current per channel (25 mA versus 40 mA) and operates from 8 V to 36 V, while the LM324ADR2G operates from 3 V to 32 V. The LM324ADR2G is better suited for low-voltage applications and applications requiring higher output current capability.

Q: Why would I choose the MC33174VDR2G over the LM348DR?

A: The MC33174VDR2G provides enhanced performance specifications: slew rate of 2.1 V/µs (versus 0.5 V/µs), gain bandwidth product of 1.8 MHz (versus 1 MHz), and input bias current of 20 nA (versus 30 nA). Additionally, the MC33174VDR2G supports the full 44 V supply voltage span and operates across the extended temperature range of -40°C to 125°C. Select the MC33174VDR2G when your application requires faster signal response, higher bandwidth, lower input bias current, or extended environmental operating conditions.

Q: Is the TL064ACDR compatible with the LM348D?

A: The TL064ACDR is mechanically compatible (14-SOIC package, 4-circuit configuration, 1 MHz gain bandwidth product) but employs a different amplifier topology (J-FET input stage). The TL064ACDR provides dramatically lower input bias current (0.03 nA versus 30 nA) and higher slew rate (3.5 V/µs versus 0.5 V/µs). However, the supply voltage span is narrower (10 V to 30 V versus 44 V for the LM348D). The TL064ACDR is suitable for applications where extremely low input bias current is critical and supply voltage requirements fall within the 10 V to 30 V range.

Q: What does "Last Time Buy" status mean for the LM348NSR?

A: Last Time Buy status indicates that the manufacturer has announced the end of production for this part. Existing inventory will be depleted, and no new production runs are planned. While the LM348NSR is currently available, quantities are limited and will eventually become unavailable. For new designs or long-term production requirements, select an active production alternative such as the LM348DR or LM324ADR2G.

Q: Can I use the LM2902VDR2G in applications requiring 0°C to 70°C operation?

A: Yes. The LM2902VDR2G is rated for -40°C to 125°C operation, which encompasses the 0°C to 70°C range. The part is fully compatible with applications requiring standard industrial temperature ranges. The extended temperature rating provides additional design flexibility for applications that may require operation at lower or higher temperatures in the future.

Q: What is the significance of the package width difference between LM348DR and LM348NSR?

A: The LM348DR uses a 14-SOIC package with 0.154" width, while the LM348NSR uses a 14-SOIC package with 0.209" width. These are different physical package variants. The LM348DR's narrower package (0.154") is the standard modern SOIC footprint and is recommended for new designs. The LM348NSR's wider package (0.209") is an older variant. Verify your PCB footprint design before selecting between these parts.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. The exception is the onsemi LM348D (obsolete), which is RoHS non-compliant. For applications requiring RoHS compliance, select from the following active production parts: LM348DR, LM324ADR2G, LM324EDR2G, LM2902VDR2G, MC33174VDR2G, or TL064ACDR. All of these parts carry ROHS3 Compliant certification.

Q: What is the MSL (Moisture Sensitivity Level) rating, and why does it matter?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture-control handling during storage or assembly. All substitute parts listed carry MSL 1 rating, meaning they can be stored and handled using standard manufacturing practices without special precautions for moisture exposure.