LSI Computer Systems, Inc.
LSI Computer Systems, Inc. (LSI/CSI) is a fabless semiconductor company founded in 1969 that designs and produces full custom and standard integrated circuits.
Last updated September 16, 2026
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Overview
LSI Computer Systems, Inc. (LSI/CSI) is a fabless semiconductor company founded in 1969. It began operations as the world's first fabless semiconductor company and has been engaged in the design and production of full custom and standard integrated circuits, producing ICs for the consumer and industrial marketplaces. The company offers turnkey development of mixed-signal, full custom ICs and a portfolio of standard ICs for motion control, lighting, and automation.
History
LSI Computer Systems, Inc. (LSI/CSI) was founded in 1969 by Attila Tetik and Alvin Kaplan. The two founders worked together at General Instrument Microelectronics, and in 1969 they were assigned to develop three full custom CPU circuits for CDC in Minneapolis, MN. These CPU ICs operated at 5 MHz and were incorporated in CDC's Aerospace Computer 469. Because of the success on this program, and the reluctance of General Instrument to proceed with the next phase, they were encouraged by CDC to spin off and form their own company, resulting in the formation of LSI Computer Systems, Inc. in 1969. CDC then awarded LSI/CSI an additional five custom circuits, designated LSI0101 through LSI0105. The company began operations as the world's first fabless semiconductor company and has been engaged in the design and production of full custom and standard integrated circuits, producing ICs for the consumer and industrial marketplaces.
Products and positioning
Fabless semiconductor company offering turnkey development of mixed-signal, full custom ICs and standard ICs for motion control, lighting, and automation.
LS7466
24-Bit 2-Axes Programmable Quadrature Counter with Serial (SPI) Interface (16-Pins).
LS7866
32-Bit Quadrature Counter with I2C Interface (14-Pins).
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