# transistor array

> two or more transistors on a common substrate

**Wikidata**: [Q7834316](https://www.wikidata.org/wiki/Q7834316)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Transistor_array)  
**Source**: https://4ort.xyz/entity/transistor-array

## Summary
A transistor array is an electronic component consisting of two or more transistors fabricated on a common substrate. It is classified as a type of integrated circuit and serves as a basic discrete device used to affect electrons or their associated fields within an electronic system. This configuration allows multiple transistors to function as a single unit.

## Key Facts
- **Definition:** A transistor array comprises two or more transistors located on a common substrate.
- **Classification:** It is a subclass of both **integrated circuit** and **electronic component**.
- **Composition:** The entity inherently contains transistors as its constituent parts.
- **Historical Prototypes (101 Series):** The 101 series integrated circuits (specifically the 101KT1 model) were an early Soviet series of monolithic transistor arrays; the prototype was established in 1965.
- **Industrial Manufacturing:** Industrial manufacturing of the 101 series began in 1966.
- **Soviet Variations:** The **159 series** is identified as a Soviet series of transistor arrays.
- **JFET Variations:** The **504 series** consists of JFET transistor arrays and small-signal JFET amplifiers.
- **Power Variations:** The **2TC843A** is a model of a Soviet power transistor array.

## FAQs
### Q: What defines a transistor array?
A: A transistor array is defined by the integration of two or more transistors onto a single common substrate. This design functions as a specific type of integrated circuit and electronic component.

### Q: What is the difference between a standard integrated circuit and a transistor array?
A: While a transistor array is a subclass of an integrated circuit, it is specifically characterized by containing multiple transistors on a shared substrate. Early examples, such as the Soviet 101 series, were among the first monolithic integrated circuits produced.

### Q: What are some historical examples of transistor arrays?
A: Historical examples include the Soviet 101 series (launched in 1965/1966) and the 159 series. Other types include the 504 series, which featured JFET technology, and the 2TC843A, a power transistor array model.

## Why It Matters
Transistor arrays are significant because they represent a fundamental evolution in electronic packaging, combining multiple discrete devices into a single compact entity. By placing two or more transistors on a common substrate, these components reduce the physical footprint required on a circuit board and improve the consistency of electrical characteristics between the transistors, as they are fabricated simultaneously under identical conditions.

This technology is historically important as a bridge between discrete transistor usage and more complex integrated circuits. For instance, the 101 series integrated circuits were among the earliest monolithic integrated circuits developed in the Soviet Union, marking a transition point in semiconductor manufacturing during the mid-1960s. Furthermore, the existence of specialized arrays—such as the 504 series for JFET amplifiers and the 2TC843A for power applications—demonstrates the versatility of this form factor in tailoring electronic solutions for specific signal processing and power management needs.

## Notable For
- **Integration Density:** Combining multiple transistors on a single common substrate to save space and improve matching.
- **Early Monolithic ICs:** The 101 series (specifically the 101KT1) is notable as an early example of monolithic integrated circuit technology, prototyped in 1965.
- **Diverse Applications:** Ranging from small-signal JFET amplifiers (504 series) to power transistor arrays (2TC843A).
- **Soviet Semiconductor History:** A distinct presence in Soviet electronics history through the 101, 159, and 504 series.

## Body
### Definition and Structure
A transistor array is an electronic component and a subclass of integrated circuit. It is distinct from isolated discrete transistors because it consists of two or more transistors formed on a common substrate. This structure allows the device to affect electrons or their associated fields within a system as a unified component.

### Historical Development (Soviet Series)
The development of transistor arrays is documented through several Soviet integrated circuit series:
*   **101 Series:** This was an early series of monolithic integrated circuits. It comprised a single model, the **101KT1**. Historical data indicates the prototype was created in 1965, with industrial manufacturing commencing in 1966.
*   **159 Series:** This series is classified broadly as a Soviet series of transistor arrays.
*   **504 Series:** These are identified specifically as JFET transistor arrays utilized for small-signal JFET amplifiers.
*   **2TC843A:** This entity is a specific model of Soviet power transistor array.

### Categorization and Media
In knowledge management systems, the transistor array is categorized under "Transistor arrays" on Wikimedia Commons. It is recognized as a basic discrete device within the broader category of electronic components.

## References

1. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)