Make data safe on power loss with 1Mb quad-SPI nvSRAM

August 04, 2015 // By Graham Prophet
For high-throughput, highly reliable data capture on power loss, Cypress’ nonvolatile RAM simplifies designs by eliminating batteries and reducing pin count for raid storage, industrial automation and networking applications

A 1Mb nonvolatile static random access memory (nvSRAM) with a Quad serial peripheral interface (SPI), this nvSRAM can exceed the data throughput of larger parallel interface devices with a smaller footprint. The nvSRAM ensures high-throughput data capture in event of a power loss without batteries for RAID storage, industrial automation, computing and networking applications.

The CY14V101QS 1Mb nvSRAM with Quad SPI interface works at a clock speed of up to 108 MHz and offers performance exceeding that of a parallel interface (x8 IO width, 45-nsec access time) device. The nvSRAM provides 24 MBps random read/write access time with unlimited write endurance, and 20-year data retention. With its reduced I/O width, it offers reduced pin count and board footprint in a 16-pin SOIC package and 24-ball BGA package. The device also includes an optional integrated real-time clock (RTC) with ±50ppm uncalibrated accuracy. The nvSRAM offers lower power consumption by a factor of 5.8 (active) and a factor of 10 (sleep) compared to competitive devices. A video on the device is available at www.cypress.com/video-library/Memory/quad-spi-nvsram/307986

These nvSRAMs can directly replace SRAM, battery-backed SRAM, EPROM and EEPROM devices, offering reliable nonvolatile data storage without batteries. Data transfers from the SRAM to the device's nonvolatile elements take place automatically at power down. On power up, data is restored to the SRAM from the nonvolatile memory. Both operations are also available under software control. Cypress's nvSRAMs use charge stored on an external capacitor instead of a battery, making the devices compatible with standard PCB assembly processes. Cypress’s nvSRAMs are manufactured on its SONOS (Silicon Oxide Nitride Oxide Silicon) embedded nonvolatile memory technology, enabling greater densities and improved access times and performance.

Cypress is using the SONOS technology in its PSoC mixed-signal arrays, programmable clocks and other products. SONOS is compatible with standard CMOS technologies and offers high endurance, low power, and radiation hardness.

Cypress; www.cypress.com/nonvolatile