Electronic Arrays

Electronic Arrays, Inc. was a United States semiconductor company active primarily during the 1960s and 1970s. It emerged from the engineering and entrepreneurial community surrounding General Micro-electronics, an early integrated-circuit manufacturer. Jim McMullen and other General Micro-electronics employees left to establish McMullen Associates, which was subsequently renamed Electronic Arrays, Inc. in 1967. The company became best known for its electronic calculator integrated circuits. In 1970, it introduced the EAS100, a four-function calculator chipset implemented across six chips. The EAS line reflected the rapid development of semiconductor manufacturing during the period: as fabrication processes improved, Electronic Arrays progressively consolidated calculator functionality into fewer components. Later versions reduced the number of chips from six to five, then four, two, and ultimately a single chip. This integration reduced component count and supported the emerging market for compact, lower-cost electronic calculators. Electronic Arrays achieved an early position in calculator semiconductors, but its advantage proved temporary. Competitors with more advanced or more efficiently scaled manufacturing processes introduced competing single-chip calculator solutions before Electronic Arrays completed its own transition. Mostek and Texas Instruments became important rivals, and Japanese semiconductor companies including Hitachi, NEC, and Toshiba subsequently intensified competitive pressure. The resulting decline in market share reflected both the speed of process innovation and the growing importance of manufacturing scale in calculator electronics. Seeking a new growth market, Electronic Arrays introduced the Electronic Arrays 9002 in 1976. The 9002 was an 8-bit NMOS logic microprocessor and represented an attempt to broaden the company beyond calculator-specific integrated circuits. Production difficulties limited the product's commercial prospects, however, and Electronic Arrays stopped marketing the design in November 1977. The company was sold to NEC in 1978. The acquisition marked the end of Electronic Arrays as an independent semiconductor brand. Its historical importance lies in its participation in the transition from multi-chip calculator electronics toward highly integrated calculator and processor devices, as well as in the competitive pressures that shaped the early semiconductor industry.

Electronic Arrays belonged to the first generation of United States semiconductor companies formed around the development and commercialization of integrated circuits. Its origins were connected to General Micro-electronics, an early IC manufacturer. Jim McMullen and other General Micro-electronics employees departed to establish McMullen Associates. The business was later renamed Electronic Arrays, Inc. in 1967. During the late 1960s and early 1970s, electronic calculators created demand for specialized integrated circuits capable of performing arithmetic functions while reducing the number of discrete components required in a finished device. Electronic Arrays targeted this opportunity with its EAS product family. The first major product identified with the company was the EAS100, introduced in 1970 as a four-function calculator chipset. It required six chips, but the product line evolved as semiconductor fabrication improved. Successive implementations combined more functions into fewer devices, moving through five-chip and four-chip versions, then two-chip and single-chip configurations. This progression illustrated a central trend in the semiconductor industry: increased integration allowed manufacturers to reduce system size, assembly complexity, and cost. Electronic Arrays was commercially successful for a period, but the calculator-chip market was highly sensitive to process technology and manufacturing efficiency. Other American manufacturers, notably Mostek and Texas Instruments, developed more advanced competing products and reached single-chip calculator solutions before Electronic Arrays' own comparable products. Japanese suppliers, including Hitachi, NEC, and Toshiba, later added further competitive pressure. As these companies entered and expanded in the market, Electronic Arrays lost share. The company attempted to redirect its business toward general-purpose digital logic and microprocessors. In 1976, it released the Electronic Arrays 9002, an 8-bit NMOS logic microprocessor. The product represented a strategic move away from dependence on calculator circuits and toward a market that was beginning to attract numerous semiconductor manufacturers. The 9002, however, encountered production difficulties. Electronic Arrays gave up marketing the design in November 1977, limiting the product's commercial impact. In 1978, NEC purchased Electronic Arrays. The transaction ended the company's independent corporate history. Electronic Arrays is remembered less as a lasting consumer-facing brand than as a technically representative semiconductor manufacturer from the calculator-chip era. Its products demonstrate the rapid move from multi-chip calculator systems to highly integrated devices, while its decline shows how quickly process leadership, production capacity, and international competition could reshape the early integrated-circuit industry.

• 1978

  Sale to NEC

  [1]Electronic Arraysen.wikipedia.org

  NEC purchases Electronic Arrays, ending the company's independent operation.

• 1977

  9002 marketing discontinued

  [1]Electronic Arraysen.wikipedia.org

  Electronic Arrays stops marketing the 9002 design in November after experiencing production problems.

• 1976

  Release of the Electronic Arrays 9002

  [1]Electronic Arraysen.wikipedia.org

  The company introduces an 8-bit NMOS logic microprocessor in an effort to expand into a broader processor market.

• 1970

  Launch of the EAS100 calculator chipset

  [1]Electronic Arraysen.wikipedia.org

  Electronic Arrays begins its prominent calculator-chip business with the six-chip EAS100 four-function calculator system.

• 1967

  McMullen Associates is renamed Electronic Arrays

  [1]Electronic Arraysen.wikipedia.org

  The company founded by Jim McMullen and former General Micro-electronics employees adopts the Electronic Arrays, Inc. name.

A specialist early semiconductor manufacturer focused first on calculator integrated circuits and later on microprocessor products.

• Calculator chipset · 1970

  EAS100

  The EAS100 was a four-function electronic calculator system introduced in 1970. It used six integrated circuits and formed the starting point for Electronic Arrays' best-known calculator product family. The line subsequently benefited from advances in semiconductor fabrication that allowed equivalent calculator functions to be consolidated into progressively fewer chips.

• Calculator integrated circuits · 1970

  EAS calculator chipset series

  The EAS series comprised calculator chipsets that progressively increased integration. Electronic Arrays moved from six-chip implementations toward five-chip, four-chip, two-chip, and eventually single-chip versions. The series was commercially successful for a time, but competition from Mostek, Texas Instruments, and Japanese semiconductor manufacturers reduced its market position.

• 8-bit NMOS logic microprocessor · 1976

  Electronic Arrays 9002

  The 9002 was an 8-bit NMOS logic microprocessor released in 1976 as part of Electronic Arrays' attempt to move beyond calculator-specific integrated circuits. Production problems undermined the product's prospects, and the company stopped marketing the design in November 1977.

• 1978

  Sell the company to NECM&A

  Background

  Electronic Arrays had lost ground in calculator semiconductors and had been unable to establish the 9002 as a successful new business.

  Action taken

  The company was sold to NEC.

  Aftermath

  Electronic Arrays ceased operating as an independent company.

  Source

• 1976

  Enter the microprocessor market with the 9002Product launch

  Background

  Competition and process advances were eroding Electronic Arrays' position in calculator chips, creating pressure to pursue a broader semiconductor market.

  Action taken

  The company released the 9002, an 8-bit NMOS logic microprocessor.

  Aftermath

  Production problems limited the product's prospects, and Electronic Arrays ceased marketing the design in November 1977.

  Source

1. 1Electronic Arraysen.wikipedia.org
2. 2Do-it-yourself Electronic Calculatorieeexplore.ieee.org