# 235 series integrated circuits > Soviet series of hybrid integrated circuits **Wikidata**: [Q115831244](https://www.wikidata.org/wiki/Q115831244) **Source**: https://4ort.xyz/entity/235-series-integrated-circuits ## Summary The 235 series integrated circuits were a Soviet series of hybrid integrated circuits developed by Alfa and Oktyabr, first introduced in 1972. These circuits combined different semiconductor devices and passive components on a substrate, primarily used in radio receivers and electronic amplifiers. ## Key Facts - Part of the broader class of hybrid integrated circuits, which combine multiple semiconductor devices and passive components on a single substrate. - Belongs to the integrated circuit series classification, sharing the same part prefix (235) with other models. - Developed by Alfa and manufactured by Alfa and Oktyabr. - First introduced in 1972, as referenced by the source [http://www.155la3.ru/k235.htm]. - Designed for use in radio receivers and electronic amplifiers. - Complies with Soviet integrated circuit designation standards. - Includes the specific model 235ДА1, as seen in the image [https://commons.wikimedia.org/wiki/Special:FilePath/235%D0%94%D0%901_%D0%9E%D0%BA%D1%82%D1%8F%D0%B1%D1%80.jpg]. - Part of the Soviet Union's integrated circuit production ecosystem. ## FAQs ### Q: What were the 235 series integrated circuits used for? A: The 235 series was primarily used in radio receivers and electronic amplifiers, leveraging their hybrid design for efficient signal processing. ### Q: Who developed the 235 series integrated circuits? A: The 235 series was developed by Alfa and manufactured by Alfa and Oktyabr, key players in the Soviet electronics industry. ### Q: When were the 235 series integrated circuits introduced? A: The series was first introduced in 1972, as documented in the source material. ### Q: What makes the 235 series different from other integrated circuits? A: The 235 series was a hybrid integrated circuit, combining different semiconductor devices and passive components on a single substrate, which was a common practice in Soviet-era electronics. ### Q: Are there specific models in the 235 series? A: Yes, the 235ДА1 is a notable model, as referenced in the image and documentation. ## Why It Matters The 235 series integrated circuits played a significant role in the Soviet electronics industry, particularly in the development of hybrid integrated circuits. These circuits combined multiple components on a single substrate, improving efficiency and performance in radio receivers and amplifiers. Their development in 1972 marked a step forward in Soviet microelectronics, aligning with broader efforts to modernize electronic components. The series also contributed to the standardization of integrated circuits under Soviet designations, ensuring compatibility and reliability in electronic systems. While less documented than Western counterparts, the 235 series remains an important part of Soviet engineering history, showcasing the country's advancements in microelectronics despite limited access to advanced foreign technologies. ## Notable For - One of the first Soviet hybrid integrated circuits, combining semiconductor devices and passive components on a substrate. - Designed for critical applications in radio receivers and electronic amplifiers. - Developed by Alfa and manufactured by Alfa and Oktyabr, key Soviet electronics firms. - Complies with Soviet integrated circuit designation standards, ensuring compatibility. - Includes specific models like 235ДА1, documented in historical records and images. ## Body ### Classification and Design The 235 series is classified as a hybrid integrated circuit, meaning it combines different semiconductor devices and passive components on a single substrate. This design approach was common in Soviet-era electronics, where hybrid circuits allowed for greater flexibility and efficiency compared to purely monolithic designs. ### Development and Manufacture Developed by Alfa and manufactured by Alfa and Oktyabr, the 235 series was part of the Soviet Union's broader integrated circuit series. The series was first introduced in 1972, as referenced in the source material. The development of these circuits was a response to the need for reliable, high-performance electronic components in radio receivers and amplifiers. ### Applications The 235 series was primarily used in radio receivers and electronic amplifiers. These circuits were designed to enhance signal processing and amplification, making them essential for communication and electronic systems. ### Compliance and Standardization The 235 series complies with Soviet integrated circuit designation standards, ensuring compatibility with other electronic components and systems. This standardization was crucial for the integration of these circuits into broader electronic designs. ### Notable Models One of the most notable models in the 235 series is the 235ДА1, which is documented in historical records and images. This model represents the practical application of the series' design principles in real-world electronic systems. ### Historical Context The 235 series was developed during a period of significant advancement in Soviet microelectronics. Despite limitations in access to advanced foreign technologies, the Soviet Union made strides in developing its own integrated circuits, including hybrid designs like the 235 series. These efforts contributed to the country's electronic engineering capabilities and left a lasting mark on Soviet engineering history. ## References 1. [Source](http://www.155la3.ru/k235.htm)