# μA709

> General-purpose operational amplifier

**Wikidata**: [Q118444902](https://www.wikidata.org/wiki/Q118444902)  
**Source**: https://4ort.xyz/entity/a709

## Summary
The μA709 is a general-purpose operational amplifier developed by Bob Widlar and first released by Fairchild Semiconductor in 1965. This integrated circuit serves as a high-gain voltage amplifier with differential input, representing an early commercially successful op-amp in the electronics industry.

## Key Facts
- The μA709 is a general-purpose operational amplifier first released in 1965
- It was developed by Bob Widlar and manufactured by Fairchild Semiconductor
- It is an integrated circuit formed on semiconductor material
- It functions as a high-gain voltage amplifier with differential input
- It also goes by aliases including 709, LM709, and uA709
- The μA709 is part of the operational amplifier class which has 62 sitelinks
- The device has one Wikipedia sitelink and is categorized as "709 operational amplifier" on Commons
- It has Wikipedia content available in the Commons language

## FAQs
### Q: When was the μA709 operational amplifier first released?
A: The μA709 was first released in 1965 by Fairchild Semiconductor.

### Q: Who developed the μA709 operational amplifier?
A: The μA709 was developed by Bob Widlar, who was known for his significant contributions to analog integrated circuit design.

### Q: What is the μA709 used for?
A: The μA709 is a general-purpose operational amplifier designed for high-gain voltage amplification with differential input, making it useful in various electronic circuits requiring signal amplification.

### Q: What companies were involved with the μA709?
A: The μA709 was developed by Bob Widlar and manufactured by Fairchild Semiconductor, becoming one of their significant integrated circuit products.

## Why It Matters
The μA709 holds significance as one of the early commercially successful general-purpose operational amplifiers, marking a milestone in the evolution of analog integrated circuits. Released in 1965, it helped democratize complex signal processing functions by making them accessible through a single, affordable integrated circuit rather than requiring discrete component assemblies. Bob Widlar's design philosophy for the μA709 established many principles that would influence op-amp design for decades to come. Its introduction at Fairchild Semiconductor contributed to the company's leadership in the emerging field of linear integrated circuits during the 1960s. As one of the first widely adopted op-amps, the μA709 enabled countless innovations in audio equipment, instrumentation, control systems, and computing devices.

## Notable For
1. One of the earliest commercially successful general-purpose operational amplifiers
2. Designed by Bob Widlar, a pioneering figure in analog integrated circuit design
3. Released in 1965, representing a significant milestone in the transition from discrete to integrated analog circuits
4. Established design principles that influenced op-amp development for decades
5. Manufactured by Fairchild Semiconductor, contributing to the company's leadership in linear integrated circuits during the 1960s

## Body
### Overview
The μA709 is a general-purpose operational amplifier introduced in 1965. It functions as a high-gain voltage amplifier with differential input. The device belongs to both the operational amplifier and integrated circuit classes, reflecting its technical classification and physical implementation.

### Technical Specifications
- Functions as a high-gain voltage amplifier with differential input
- Part of the operational amplifier class which has 62 sitelinks
- Classified as an integrated circuit formed on semiconductor material
- Designed to provide general-purpose amplification capabilities for various electronic applications

### Development and Manufacturing
- Developed by Bob Widlar, a significant figure in analog integrated circuit design
- First released in 1965
- Manufactured by Fairchild Semiconductor
- Also known by aliases including 709, LM709, and uA709

### Documentation and Recognition
- Has one Wikipedia sitelink
- Categorized as "709 operational amplifier" on Wikimedia Commons
- Wikipedia content available in the Commons language
- Features an image available at https://commons.wikimedia.org/wiki/Special:FilePath/Operational_Amplifier_µA709CT.jpg

### Historical Context
The μA709 emerged during the formative years of integrated circuit technology. Its release in 1965 coincided with a period of rapid innovation in semiconductor manufacturing and linear circuit design. As one of the early commercially successful op-amps, it helped establish the operational amplifier as a fundamental building block in electronic systems.