Cypress Semiconductor STK16C88 Manual do Utilizador descarregar pdf (Página 28)

12.02.07

Simtek Confidential

Ramtron 1 Mb Summary

•

Be Careful of the Ramtron Marketing Propaganda

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Ramtron claims a 60 ns part for their 1Mb FRAM, and marks it

appropriately on the package

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This is only part of the truth!

•

Their read/write cycle time for commercial temp is 150 ns, 6 times

slower than Simtek’s 1 Mb

•

Their read/write cycle time for industrial temp is 350 ns, 14 times

slower than Simtek’s 1 Mb

•

The 60 ns access is for Chip Enable access, a non-standard way of

operation during regular microprocessor accesses. But it doesn’t

include a 90 ns pre-charge time.

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Cypress Semiconductor STK16C88 Manual do Utilizador Página 28