LM359MX General Purpose Operational Amplifier Equivalent & Substitute Parts

Part Overview

The LM359MX is a general purpose operational amplifier featuring dual circuits in a 14-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. The LM359MX remains in active inventory and continues to serve legacy applications and existing designs requiring dual-channel amplification with moderate bandwidth and supply voltage flexibility.

Identifying equivalent and substitute parts is necessary for design continuity, supply chain management, and ensuring long-term availability for systems currently utilizing the LM359MX in production or maintenance scenarios.

Substiute Parts

LM359MX

Texas InstrumentsIn Stock: 2346LM359MX Datasheet

Current PartRFQ

LM359MX/NOPB

Texas InstrumentsIn Stock: 16820LM359MX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM359MX is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute identified is the LM359MX/NOPB, which maintains identical electrical specifications including slew rate, gain bandwidth product, input bias current, supply current, output current capability, and supply voltage range.

The substitution logic is based on the following critical parameters that must remain constant:

• Dual-channel general purpose amplifier configuration
• 60 V/µs slew rate
• 400 MHz gain bandwidth product
• 8 µA input bias current
• 18.5 mA total supply current across both channels
• 40 mA output current per channel
• 5 V to 22 V supply voltage operating range
• 14-SOIC surface mount package with 3.90 mm width
• 0°C to 70°C operating temperature specification

The LM359MX/NOPB differs from the main part number only in packaging format (Cut Tape and Digi-Reel options) and product status classification (Active versus Not For New Designs), with improved RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The LM359MX/NOPB is the direct functional equivalent of the LM359MX. Both parts share identical electrical performance specifications and physical package dimensions, ensuring pin-for-pin and functional compatibility in existing circuit designs.

The LM359MX/NOPB offers the following advantages for new procurement:

• Active product status, ensuring continued manufacturer support and availability
• ROHS3 compliance, meeting current environmental and regulatory requirements
• Availability in Cut Tape and Digi-Reel packaging formats, supporting automated assembly processes
• Higher inventory levels (16,770 pieces versus 2,280 pieces), reducing lead time risk

The LM359MX remains suitable for legacy system maintenance and repair applications where existing stock is available. Selection between these parts should be based on supply chain requirements, regulatory compliance mandates, and production volume considerations rather than electrical performance, as both devices are electrically identical.

Frequently Asked Questions (FAQ)

Q: Can the LM359MX/NOPB be used as a direct replacement for the LM359MX in existing designs?

A: Yes. The LM359MX/NOPB is electrically and mechanically identical to the LM359MX. All electrical parameters, including slew rate, bandwidth, current specifications, and supply voltage range, are identical. The 14-SOIC package dimensions are unchanged. Direct substitution is supported without circuit modification.

Q: What is the difference between LM359MX and LM359MX/NOPB?

A: The primary differences are product status classification, RoHS compliance level, and packaging format. The LM359MX/NOPB is classified as Active (versus Not For New Designs), meets ROHS3 compliance (versus non-compliant), and is available in Cut Tape and Digi-Reel formats. Electrical specifications are identical.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the identical temperature range (0°C to 70°C) and deliver identical electrical performance. Thermal characteristics and performance metrics are equivalent.

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

A: The LM359MX/NOPB should be selected for new production designs. It carries Active product status, ensuring long-term manufacturer support, and meets current ROHS3 environmental compliance requirements. The LM359MX is designated "Not For New Designs" and should be reserved for legacy system maintenance.

Q: Is the 14-SOIC package compatible with automated assembly equipment?

A: Yes. Both the LM359MX and LM359MX/NOPB are supplied in 14-SOIC surface mount packages compatible with standard pick-and-place assembly equipment. The LM359MX/NOPB additionally offers Cut Tape and Digi-Reel packaging options optimized for high-volume automated production.

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, reflecting RoHS3 compliance. This designation confirms the part meets current lead-free and environmental standards required for modern electronics manufacturing and distribution.