# 207 series integrated circuits

> rare series of hybrid logic circuits

**Wikidata**: [Q119956886](https://www.wikidata.org/wiki/Q119956886)  
**Source**: https://4ort.xyz/entity/207-series-integrated-circuits

## Summary
The 207 series is a rare series of hybrid logic circuits. It belongs to the class of hybrid integrated circuits, combining different semiconductor devices and passive components on a substrate, and uses thin film and direct-coupled transistor logic technology.

## Key Facts
- Instance of: integrated circuit series
- Subclass of: hybrid integrated circuit and direct-coupled transistor logic
- Uses: thin film, direct-coupled transistor logic
- Aliases: МИГ-3 (Russian)
- Sitelink count: 1 (indicating limited documentation online)
- Described at URL: http://www.155la3.ru/k207.htm (in Russian)
- Image available: https://commons.wikimedia.org/wiki/Special:FilePath/2nk077_1small.jpg
- Commons category: 207 series integrated circuits

## FAQs
### Q: What makes the 207 series integrated circuits significant?
A: The 207 series is significant as a rare hybrid logic circuit series, utilizing direct-coupled transistor logic and thin film technology within a hybrid integrated circuit structure. Its rarity and specific technological implementation place it in a niche category of early computing components.

### Q: What is a hybrid integrated circuit in relation to the 207 series?
A: A hybrid integrated circuit, like those in the 207 series, is a miniaturized electronic circuit combining different semiconductor devices (like transistors) and passive components (like resistors) on a single substrate, rather than monolithically fabricated on one semiconductor wafer.

### Q: What is direct-coupled transistor logic?
A: Direct-coupled transistor logic (DCTL) is a type of digital logic circuit family where transistor inputs are directly connected together (direct-coupled) without isolation resistors, differing from resistor-transistor logic (RTL). The 207 series specifically implements this logic technology.

## Why It Matters
The 207 series integrated circuits hold historical significance as a rare example of Soviet hybrid logic technology development. As a hybrid IC, it represents a distinct technological approach to miniaturization compared to monolithic chips, combining different semiconductor and passive elements on a substrate. Its use of direct-coupled transistor logic (DCTL) also reflects a specific, albeit less common, logic family design choice prevalent in certain eras of electronics. Its rarity and the existence of dedicated Russian documentation make it a subject of interest for researchers studying obsolete computing technology, early Soviet electronics design practices, and the evolution of logic circuit families beyond mainstream monolithic approaches.

## Notable For
*   Extreme rarity as a documented hybrid logic integrated circuit series.
*   Being a hybrid IC combining diverse semiconductor devices and passive components on a substrate.
*   Implementation using the specific direct-coupled transistor logic (DCTL) technology.
*   Exclusivity documented in Russian sources (alias МИГ-3, Russian Wikipedia/website).
*   Specific thin film technology utilized in its construction.

## Body
### Classification
*   Entity: 207 series integrated circuits
*   Instance of: integrated circuit series
*   Superclass: hybrid integrated circuit
*   Implemented Logic: direct-coupled transistor logic (DCTL)

### Technology
*   Construction Type: Hybrid Integrated Circuit
*   Technology Used: Thin film
*   Logic Family: Direct-coupled transistor logic (DCTL)

### Documentation
*   Sitelink Count: 1
*   Described At: http://www.155la3.ru/k207.htm (Language: Russian)
*   Wikimedia Commons Image: [2nk077_1small.jpg](https://commons.wikimedia.org/wiki/Special:FilePath/2nk077_1small.jpg)
*   Commons Category: 207 series integrated circuits
*   Aliases: МИГ-3 (Russian)

## References

1. [Source](http://www.155la3.ru/k207.htm)