SC258NG Equivalent & Substitute Parts

Part Overview

The SC258NG is a general-purpose operational amplifier integrated circuit manufactured by onsemi, housed in an 8-PDIP (0.300", 7.62mm) through-hole package. This device is classified as obsolete, indicating it is no longer in active production. The SC258NG serves as a foundational linear amplifier circuit suitable for general-purpose analog signal processing applications. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, system maintenance, and component procurement in legacy and new applications requiring compatible performance characteristics.

Substiute Parts

SC258NG

onsemiIn Stock: 1075SC258NG Datasheet

Current PartRFQ

LM258DR2G

onsemiIn Stock: 505253LM258DR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC258NG is determined by functional equivalence within the general-purpose operational amplifier category. The primary substitute identified is the LM258DR2G, also manufactured by onsemi. This substitution is valid based on the following criteria:

Functional Compatibility Parameters:

• Both devices belong to the Linear, Amplifiers category
• Both are classified as General Purpose amplifier types
• Both are manufactured by onsemi, ensuring design and performance consistency
• Both comply with identical regulatory classifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.33.0001)
• Both maintain MSL 1 (Unlimited) moisture sensitivity rating

Package Consideration: The SC258NG utilizes through-hole mounting (8-PDIP), while the LM258DR2G employs surface-mount technology (8-SOIC). This represents a packaging transition rather than a functional limitation, requiring PCB layout modification for implementation.

Product Status Transition: The SC258NG (obsolete) is replaced by the LM258DR2G (active), reflecting the industry shift from through-hole to surface-mount assembly methods.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution in Through-Hole Applications: The SC258NG remains the appropriate choice if through-hole mounting is a design requirement and inventory is available. With 1,037 pieces in stock, the SC258NG is accessible for legacy system repairs and maintenance.

For New Designs and Surface-Mount Implementations: The LM258DR2G is the designated successor component. Its active product status ensures long-term availability and supply chain stability. With 505,200 pieces in stock, the LM258DR2G provides superior procurement reliability. The LM258DR2G carries ROHS3 compliance, meeting modern environmental and regulatory standards that the SC258NG does not explicitly specify.

Regulatory and Compliance Alignment: Both components share identical REACH, ECCN, and HTSUS classifications, ensuring compliance consistency across substitution. The LM258DR2G's ROHS3 compliance positions it favorably for applications subject to environmental regulations.

Supply Chain Considerations: The obsolete status of the SC258NG necessitates transition planning. The LM258DR2G's active status and significantly higher inventory level (505,200 vs. 1,037 units) support long-term design continuity and procurement strategy.

Frequently Asked Questions (FAQ)

Q: Can the LM258DR2G directly replace the SC258NG in existing through-hole PCB designs?

A: Electrical substitution is valid; however, physical replacement requires PCB redesign. The SC258NG uses 8-PDIP through-hole packaging, while the LM258DR2G uses 8-SOIC surface-mount packaging. Adapter solutions or PCB layout modification is necessary for implementation.

Q: What are the key electrical parameters that confirm substitution compatibility?

A: Both devices are general-purpose operational amplifiers manufactured by onsemi within the Linear, Amplifiers category. Functional equivalence is established through identical amplifier classification and manufacturer origin. The LM258DR2G provides specified electrical parameters (1 MHz gain bandwidth product, 45 nA input bias current, 2 mV input offset voltage, 800µA supply current, 40 mA output current per channel, 3V to 32V supply range, -25°C to 85°C operating temperature) that define its performance envelope.

Q: Are there regulatory or compliance differences between these components?

A: Both components maintain identical REACH Unaffected status, EAR99 ECCN classification, and 8542.33.0001 HTSUS code. The LM258DR2G additionally carries ROHS3 compliance certification, which the SC258NG does not explicitly specify. This distinction is relevant for applications subject to environmental regulations.

Q: What is the significance of the MSL 1 (Unlimited) rating for both components?

A: MSL 1 (Unlimited) indicates the lowest moisture sensitivity level, meaning these components do not require special moisture control during storage, handling, or assembly. Both the SC258NG and LM258DR2G can be stored and processed under standard industrial conditions without moisture-related degradation risk.

Q: How does the packaging difference affect component selection?

A: The SC258NG's through-hole 8-PDIP package suits legacy PCB designs and manual assembly processes. The LM258DR2G's surface-mount 8-SOIC package aligns with modern automated assembly and higher-density PCB layouts. Selection depends on manufacturing capability, PCB design constraints, and production volume requirements.

Q: What inventory considerations should influence the substitution decision?

A: The SC258NG has 1,037 units available, suitable for limited production runs or maintenance applications. The LM258DR2G has 505,200 units in stock, providing substantially greater availability for volume production and long-term supply assurance. For new designs, the LM258DR2G's inventory depth supports scalable manufacturing.