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HD35404 - Hitachi
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Hitachi HD35404
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Developer Hitachi

Introduction date Q1, 1975

Model HD35404

Cores 1

Clock 740 KHz

Bus Width 4-bit

Memory Specs
Max Memory  ?

Package 16-pin DIP

The Hitachi HD35404 was a 4-bit microprocessor first produced first quarter of 1975 by Hitachi.[1] The HMCS-4 used pMOS technology and was architecturally compatible with the Intel 4004. The chip came in 16-pin DIP packages. The HD35404 was part of the Hitachi HMCS-4, an Intel MCS-4 clone. The HD35404 was the first microprocessor produced by Hitachi which paved their way into the microprocessor market.


  1. Jack Belzer, Albert G. Holzman, Allen Kent. (Jul 1, 1978). Encyclopedia of Computer Science and Technology: Volume 10 - Linear and Matrix Algebra to Microorganisms: Computer-Assisted Identification. Page 402

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