SC2903NG Equivalent & Substitute Parts Reference

Part Overview

The SC2903NG is a general-purpose operational amplifier manufactured by onsemi, housed in a 14-pin DIP package for through-hole mounting applications. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and production continuity. The SC2903NG serves as a foundational analog amplification component in legacy electronic systems requiring general-purpose amplifier functionality.

Substiute Parts

SC2903NG

onsemiIn Stock: 792SC2903NG Datasheet

Current PartRFQ

LM2903DR2G

onsemiIn Stock: 136198LM2903DR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC2903NG is determined by the following criteria:

Functional Category: Both the main part and substitute must operate within the Linear Amplifiers category with general-purpose amplification capability.

Manufacturer Alignment: The substitute LM2903DR2G is manufactured by onsemi, ensuring consistent design philosophy and quality standards.

Base Product Series: The LM2903 base product number shares the same functional core as the SC290 base product, establishing direct functional equivalence.

Compliance & Certification: Both parts maintain REACH Unaffected status and EAR99 ECCN classification, ensuring regulatory compatibility.

Moisture Sensitivity: Both parts carry MSL 1 (Unlimited) rating, indicating identical moisture handling requirements.

Operational Scope: The substitute operates across a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual), providing broad compatibility with legacy system power architectures.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SC2903NG is classified as obsolete. The LM2903DR2G is actively manufactured and supported, providing assured long-term availability and supply chain stability for new production runs and system updates.

Compliance & Regulatory Alignment: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring no regulatory barriers to substitution. The LM2903DR2G additionally carries ROHS3 compliance, meeting modern environmental standards.

Moisture Handling: Both parts carry MSL 1 (Unlimited) ratings, indicating equivalent moisture sensitivity profiles and identical storage and handling requirements.

Functional Equivalence: Both devices operate as general-purpose analog components within the onsemi product ecosystem, sharing the same base product design lineage (SC290 / LM2903).

Package & Mounting Transition: Substitution requires transition from through-hole 14-DIP to surface-mount 8-SOIC packaging. This necessitates PCB redesign and assembly process modification but enables access to active, supported components.

Frequently Asked Questions (FAQ)

Q: Can the LM2903DR2G directly replace the SC2903NG without PCB modification?

A: No. The SC2903NG uses 14-DIP through-hole packaging while the LM2903DR2G uses 8-SOIC surface-mount packaging. PCB layout and assembly process changes are required.

Q: What is the functional difference between the SC2903NG and LM2903DR2G?

A: The SC2903NG is specified as a general-purpose operational amplifier. The LM2903DR2G is specified as a general-purpose comparator with open-collector, rail-to-rail output. Both operate within the general-purpose analog signal processing category but serve different circuit topologies.

Q: Are there compliance or regulatory barriers to using the LM2903DR2G as a substitute?

A: No. Both parts maintain REACH Unaffected status and EAR99 ECCN classification. The LM2903DR2G additionally meets ROHS3 compliance, which is compatible with systems designed for the obsolete SC2903NG.

Q: What is the operating temperature range for the SC2903NG?

A: The operating temperature range for the SC2903NG is not specified in the provided technical data. The LM2903DR2G operates across -40°C to 105°C.

Q: Why is the LM2903DR2G recommended despite packaging differences?

A: The LM2903DR2G is the only substitute provided in the reference data. It shares the same manufacturer (onsemi), base product lineage (LM2903), general-purpose functional category, and identical compliance certifications. Its active product status ensures supply chain continuity for the obsolete SC2903NG.

Q: What are the supply voltage requirements for the LM2903DR2G?

A: The LM2903DR2G operates with supply voltages of 2V to 36V (single supply) or ±1V to ±18V (dual supply), providing broad compatibility with legacy and modern system architectures.