TEXAS INSTRUMENTS "LARGE-SCALE INTEGRATION" INTEGRATED CIRCUITS Group of silicon integrated circuit slices, Dallas, 1965-1967,

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Lot 60
TEXAS INSTRUMENTS "LARGE-SCALE INTEGRATION" INTEGRATED CIRCUITS
Group of silicon integrated circuit slices, Dallas, 1965-1967,

US$ 5,000 - 7,000
£ 3,800 - 5,300
TEXAS INSTRUMENTS "LARGE-SCALE INTEGRATION" INTEGRATED CIRCUITS
Group of silicon integrated circuit slices, Dallas, 1965-1967, varying condition.
WITH: Group of 5 custom shift register chips, Dallas, 1965-1967, each with 28 pins, mixed materials.

An interesting peek into a forgotten avenue of integrated circuitry. Large-scale integration as developed at Texas Instruments by Jerry Merryman, with help from Dr. James Van Tassel and Gaynel Lockhart, involved a great leap in the capacity of an integrated circuit. Whereas complex ICs of the time contained 20 transistors, LSI, using 3 interconnected layers, sought to place 100 times the transistors on a single chip and increase the transistor yield rate from 25 to 83 percent. Merryman attempted to accomplish this by using "low-power circuits and very wide tolerances in the voltages and currents that'll work and simple layouts and so on" (May p50). Unfortunately, the chips came back from manufacturing unreliable. Merryman and his team had to put each chip under a microscope and trace out the connections, find problems and either fix or reroute to avoid them. The present lot includes some of the original chips used in the development of the first hand held calculator. Each are numbered and some include a single-word note of their function. Merryman apparently had some sense of the importance of the work as one of the circuit slices is encased in resin for preservation and display.
The shift register chips here were also produced especially for use in the hand held calculator for the working memory. May, Mike. "How the Computer Got Into Your Pocket," in Invention & Technology Spring 2000; Reid, T.R. The Chip. 1984; Scrupski, Steve. "LSI in Practice" in: EE: The Electrical Engineer October 1966; Zygmmont, Jeffrey. Microchip. 2003.
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TEXAS INSTRUMENTS "LARGE-SCALE INTEGRATION" INTEGRATED CIRCUITS Group of silicon integrated circuit slices, Dallas, 1965-1967,
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