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Large-scale integration (LSI) is the process of integrating or embedding thousands of transistors on a single silicon semiconductor microchip. LSI technology was conceived in the mid-1970s when computer processor microchips were under development.
LSI is no longer in use. It was succeeded by very large-scale integration (VLSI) and ultra large-scale integration (ULSI) technologies.
Techopedia Explains Large-Scale Integration
LSI defines the technology used to build powerful microchips or integrated circuits (IC) in a very small form factor. It succeeded small-scale integration (SSI) and medium-scale integration (MSI), which included tens to hundreds of transistors per microchip. LSI consists of thousands of transistors that are closely embedded and integrated with a very small microchip.
One of the first components built on LSI technology was 1-K bit RAM, which contained 4,000 transistors. Later components and microprocessors held up to 10,000 embedded transistors.
