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February 15, 1989

SUB-NS STATIC PROTOTYPES FROM TOSHIBA, HITACHI

By CBR Staff Writer

Toshiba Corp and Hitachi Ltd each claims to have developed the fastest 1M static random access memory chip yet seen. Toshiba says that its chip, with an access time of 800 picoseconds, is the world’s first prototype combining bipolar and CMOS structures, and it seems to be the winner in the performance stakes because Hitachi’s pure MOS part has an access time of 900pS. The previous fastest static had an access time of 1.4nS. Toshiba says that its BiCMOS process gives faster faster access time than MOS, and higher integration and lower power consumption than pure bipolar. It is thinking in terms of samples in two years, but has no idea when it will put the things into volume production. Hitachi plans to start volume production in 1992. Statics are used in supercomputer main mem-ory as well as all kinds of cache.

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