LM348N/NOPB Equivalent & Substitute Parts

Part Overview

The LM348N/NOPB is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-pin DIP package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The LM348N/NOPB operates across a supply voltage range of 10V to 36V and is suitable for applications requiring general-purpose amplification with moderate bandwidth and slew rate specifications.

Substiute Parts

LM348N/NOPB

Texas InstrumentsIn Stock: 782LM348N/NOPB Datasheet

Current PartRFQ

LM348N

STMicroelectronicsIn Stock: 40240LM348N Datasheet

DirectRFQ

LM248N

STMicroelectronicsIn Stock: 1590LM248N Datasheet

UpgradeRFQ

OP11EPZ

Analog Devices Inc.In Stock: 2179OP11EPZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM348N/NOPB is determined by strict equivalence across the following critical parameters: amplifier type (general purpose), number of circuits (4), package type (14-DIP through-hole), and electrical performance specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, and output current per channel. All substitute parts must maintain compatibility with the 14-pin DIP footprint and support the same mounting methodology.

The substitute parts are grouped into three categories based on their relationship to the main part:

Direct Equivalent (LM348N by STMicroelectronics): Identical base product number with matching electrical specifications and package configuration, differing only in supply voltage span specification.

Upgrade Option (LM248N by STMicroelectronics): Enhanced performance variant with improved gain bandwidth product (1.3 MHz versus 1 MHz) and extended operating temperature range (-40°C to 105°C versus 0°C to 70°C), maintaining identical package and mounting specifications.

Manufacturer Recommended Alternative (OP11EPZ by Analog Devices Inc.): Active product status with improved slew rate (1V/µs versus 0.5V/µs) and compatible package configuration, representing a performance-enhanced alternative with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The LM348N manufactured by STMicroelectronics provides functional equivalence to the LM348N/NOPB. Both components share identical electrical performance specifications and package configuration. Selection of this substitute is appropriate for applications where the original Texas Instruments part is unavailable and supply voltage requirements remain within the specified range.

For Enhanced Performance Requirements: The LM248N by STMicroelectronics offers improved gain bandwidth product (1.3 MHz) and extended operating temperature range (-40°C to 105°C). This upgrade option is suitable for applications requiring operation across wider temperature extremes or where increased bandwidth performance is beneficial. The component maintains identical package and mounting specifications.

For Active Product Status: The OP11EPZ by Analog Devices Inc. is the only substitute part with active product status, ensuring ongoing manufacturing availability and supply chain continuity. This component features improved slew rate performance (1V/µs) and is manufactured by a major semiconductor supplier. The OP11EPZ is appropriate for new designs or applications where long-term component availability is a critical requirement. Note that input bias current (180 nA) and input offset voltage (0.3 mV) differ from the main part specifications.

All substitute parts maintain ROHS3 compliance and are classified as REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM348N by STMicroelectronics be used as a direct replacement for the LM348N/NOPB by Texas Instruments?

A: The LM348N by STMicroelectronics is functionally equivalent to the LM348N/NOPB. Both components feature identical amplifier type, circuit count, slew rate, gain bandwidth product, input bias current, input offset voltage, and output current specifications. The primary difference is the supply voltage span specification (44V fixed versus 10V to 36V range). Direct substitution is appropriate for applications operating within the overlapping voltage range.

Q: What are the key differences between the LM248N and the LM348N/NOPB?

A: The LM248N provides enhanced performance in two areas: gain bandwidth product is increased to 1.3 MHz (compared to 1 MHz), and operating temperature range is extended to -40°C to 105°C (compared to 0°C to 70°C). All other electrical specifications and the 14-DIP package configuration remain identical. The LM248N is suitable for applications requiring improved bandwidth or operation across extended temperature ranges.

Q: Why is the OP11EPZ classified as a manufacturer-recommended alternative?

A: The OP11EPZ by Analog Devices Inc. is the only substitute part with active product status, ensuring current manufacturing and supply availability. This component features improved slew rate performance (1V/µs versus 0.5V/µs) and is produced by a major semiconductor manufacturer. The OP11EPZ is recommended for new designs or applications where long-term component availability is essential.

Q: Are all substitute parts compatible with the same printed circuit board footprint?

A: Yes. All substitute parts utilize the 14-DIP (0.300", 7.62mm) package with through-hole mounting configuration, ensuring direct compatibility with existing printed circuit board designs without layout modifications.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements applicable to electronic components.

Q: How do the input bias current specifications of the OP11EPZ compare to the main part?

A: The OP11EPZ specifies input bias current of 180 nA, compared to 30 nA for the LM348N/NOPB. This represents a six-fold increase in input bias current. Applications sensitive to input bias current effects require evaluation of this parameter difference during substitution analysis.

Q: What is the significance of the supply voltage span difference between the LM348N/NOPB and the STMicroelectronics LM348N?

A: The LM348N/NOPB operates across a supply voltage range of 10V to 36V, while the STMicroelectronics LM348N specifies a fixed 44V supply voltage span. Applications operating within the 10V to 36V range are compatible with both parts. Applications requiring operation at voltages outside this range require the STMicroelectronics specification.