Cypress Semiconductor has introduced serial non-volatile SRAMs with SPI and I²C interfaces for automotive, metering and industrial applications. They deliver operating frequencies up to 104MHZ for the SPI devices (3.4MHz for the I²C versions) and are also offered with an optional integrated real-time clock that enables time-stamping of critical data to be backed-up. The nvSRAMs are manufactured on the company's S8 0.13µm SONOS (silicon oxide nitride oxide silicon) for non-volatile data security such as electronic smart meters, PLCs, motor drives, electronic data recorders in automobiles, RAID systems, medical and datacomms. There are 1Mbit, 512, 256 and 64kbit devices. The SPI operating frequency is up to 104MHz, with SPI Modes 0 and 3, infinite read/write and recall cycles with 20 years of data retention.
