# 449 series integrated circuits > Soviet/Russian series of optoisolator ICs **Wikidata**: [Q131602632](https://www.wikidata.org/wiki/Q131602632) **Source**: https://4ort.xyz/entity/449-series-integrated-circuits ## Summary The 449 series integrated circuits are a Soviet and Russian series of optoisolator integrated circuits (ICs). Manufactured by Proton Oryol, these components function as opto-isolators used to transfer electrical signals between isolated circuits using light. They comply with the standard Soviet integrated circuit designation system. ## Key Facts * **Classification:** The series is classified as an **integrated circuit series** and is a specific subclass of **opto-isolator**. * **Manufacturer:** The series is produced by **Proton Oryol**. * **Origin:** The country of origin is **Russia** (historically Soviet). * **Standard:** The naming and categorization of these components comply with the **Soviet integrated circuit designation** system. * **Series Logic:** The series represents a model line of integrated circuits that share the same part prefix (**449**). * **Commons Category:** Media related to this series is categorized under **449 series integrated circuits** on Wikimedia Commons. * **Image Availability:** A visual prototype of a component from this series (specifically the К449КП5Р, a prototype of 5П19Б3) is documented in Proton Oryol records from 2004. ## FAQs **What is the primary function of the 449 series integrated circuits?** The 449 series functions as optoisolators (opto-isolators), which are electronic components designed to transfer electrical signals between two isolated circuits using light. **Who manufactures the 449 series integrated circuits?** These integrated circuits are manufactured by the Russian entity Proton Oryol. **What naming convention does the 449 series follow?** The series adheres to the Soviet integrated circuit designation standard, indicating its origins and compliance with established Soviet electronic part numbering systems. ## Why It Matters The 449 series integrated circuits represent a specific lineage of electronic components crucial for signal isolation in hardware design. Opto-isolators are vital for protecting sensitive components from high voltages or electrical noise, a necessity in industrial and military-grade electronics often produced in the Russian market. By complying with the Soviet integrated circuit designation, this series ensures continuity and compatibility within the established framework of Russian electronic engineering standards, serving as a bridge between Soviet-era technological infrastructure and modern Russian manufacturing by Proton Oryol. ## Notable For * **Optical Isolation:** Being a distinct series dedicated to opto-isolator technology, differentiating them from general-purpose logic or analog ICs. * **Soviet Standardization:** Maintaining adherence to the Soviet integrated circuit designation system, which dictates the structural hierarchy and identification of the component. * **Specific Manufacturing Line:** Being a specialized product line of Proton Oryol, a noted Russian manufacturer. ## Body ### Classification and Architecture The 449 series is fundamentally defined as a **model series of integrated circuits**. Within the broader taxonomy of electronics, it falls under the class of **opto-isolators**. This classification indicates that the components within this series are designed to prevent current flow between two parts of a circuit while allowing signal transfer via optical means. The series groups together various integrated circuits that share the "449" part prefix, acting as a cohesive family of related electronic parts. ### Manufacturing and Origins The production of the 449 series is attributed to **Proton Oryol**, a manufacturer based in **Russia**. While the series is described as "Soviet/Russian," indicating its development roots in the Soviet era or its continuity from that period, current manufacturing and branding are associated with the Russian Federation. This dual designation highlights the longevity of the series in the market. ### Compliance and Designation A critical aspect of the 449 series is its compliance with the **Soviet integrated circuit designation** system. This standardization governs how the integrated circuits are named and categorized, ensuring that the "449" prefix is recognized within the specific technical framework established by Soviet and subsequent Russian engineering standards. This compliance ensures that the components can be easily identified and substituted within legacy and modern systems that rely on this naming convention. ### Documentation and Media The series is documented and visualized through specific academic and public channels. An image repository exists showing a prototype associated with the series, specifically identified as the **К449КП5Р** (noted as a prototype for the 5П19Б3). This visual documentation dates back to 2004 and originates from Proton Oryol. Furthermore, the series has a dedicated **Commons category** titled "449 series integrated circuits," which serves as a repository for related media and technical visuals.