# 561 series integrated circuits

> Soviet variant of the 4000 CMOS series

**Wikidata**: [Q115793813](https://www.wikidata.org/wiki/Q115793813)  
**Source**: https://4ort.xyz/entity/561-series-integrated-circuits

## Summary
The 561 series integrated circuits is a Soviet variant of the 4000 CMOS series, developed in 1970. It is part of the broader family of integrated circuit series sharing the same part prefix, adhering to Soviet integrated circuit designation standards.

## Key Facts
- Part of the 4000 series integrated circuits family
- Developed in the Soviet Union in 1970
- Uses CMOS technology and dual in-line packaging
- Complies with Soviet integrated circuit designation
- Related to other integrated circuit series with the same part prefix
- Includes the 561ЛН1 variant (e.g., K561ЛН1)
- Part of a broader class of integrated circuit series

## FAQs
### Q: What technology does the 561 series use?
A: The 561 series uses CMOS technology and is packaged in dual in-line packages.

### Q: Where was the 561 series developed?
A: The 561 series was developed in the Soviet Union, specifically as a variant of the 4000 CMOS series.

### Q: What is the relationship between the 561 series and the 4000 series?
A: The 561 series is a Soviet variant of the 4000 CMOS series, sharing the same part prefix and classification.

### Q: What packaging does the 561 series use?
A: The 561 series is packaged in dual in-line packages.

### Q: What standards does the 561 series comply with?
A: The 561 series complies with Soviet integrated circuit designation standards.

## Why It Matters
The 561 series integrated circuits played a significant role in the Soviet electronics industry by providing a locally developed alternative to the 4000 CMOS series. As part of the broader integrated circuit series, it contributed to the advancement of electronic components in the Soviet Union, ensuring compatibility with existing systems while adhering to national standards. Its development in 1970 reflects the Soviet Union's efforts to create self-sufficient electronic solutions, particularly in the context of the Cold War. The series' use of CMOS technology and dual in-line packaging further underscores its relevance in early integrated circuit design.

## Notable For
- Being a Soviet variant of the 4000 CMOS series
- Compliance with Soviet integrated circuit designation standards
- Use of CMOS technology and dual in-line packaging
- Part of a broader class of integrated circuit series
- Inclusion of specific variants like K561ЛН1

## Body
### Overview
The 561 series integrated circuits is a Soviet-developed variant of the 4000 CMOS series, first introduced in 1970. It is classified as part of the broader integrated circuit series, sharing the same part prefix with other related models.

### Technology and Packaging
The series utilizes CMOS technology and is packaged in dual in-line packages, ensuring compatibility with existing electronic systems. This packaging choice was common in early integrated circuits for ease of installation and integration into circuits.

### Standards and Compliance
The 561 series complies with Soviet integrated circuit designation standards, reflecting the country's specific guidelines for electronic component development during that era. This adherence to national standards was crucial for ensuring the series' functionality within the Soviet electronics industry.

### Relationship to Other Series
The 561 series is closely related to the 4000 series integrated circuits, sharing the same classification and part prefix. This relationship highlights the series' role as a localized alternative to the original 4000 CMOS series, developed to meet the needs of the Soviet Union's electronics sector.

### Notable Variants
One notable variant of the 561 series is the K561ЛН1, which is part of the broader 561 series family. This variant, like others in the series, contributes to the overall advancement of integrated circuit technology in the Soviet Union.