Fastest high-density NVRAM: nvSRAM at 16 Mb

May 08, 2014 // By Graham Prophet
Cypress Semiconductor has a family of 16 Mb nonvolatile Static Random Access Memories (nvSRAMs), including devices with asynchronous parallel and asynchronous Open NAND Flash Interface (ONFI) Standard 1.0 interfaces.

The 16 Mb nvSRAM family extends Cypress's portfolio to address mission-critical applications such as high-end programmable logic controllers (PLCs), high-speed data/error loggers in storage equipment, networking equipment, avionics systems, and electronic gaming machines.

The 16 Mb nvSRAMs are the fastest high-density asynchronous nonvolatile RAMs available, with access times as low as 25 nsec. Cypress offers the new devices with an optional integrated Real-Time Clock (RTC), which enables time-stamping of critical data to be logged. Cypress nvSRAMs feature unlimited read, write and recall cycles, with 20-year data retention at 85˚C and 150 years at 65˚C . Cypress nvSRAM is a solution for applications requiring continuous high-speed reading and writing of data and absolute nonvolatile data security.

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 RoHS-compliant and directly replace SRAM, battery-backed SRAM (BBSRAM) and EEPROM devices, offering fast nonvolatile data storage. 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. Cypress nvSRAMs offer high-speed data transfer while ensuring data integrity in case of power outages without the need for a battery. Target applications include PLC, storage, networking, avionic, and gaming applications as well as metering, industrial, automotive and RAID applications.

Mission-critical systems require high-performance memories that can capture data instantly and reliably on power loss, Cypress says, asserting that its 16 Mb nvSRAMs deliver absolute data security with fastest high-density NVRAM. The ONFI 1.0 interface option also allows designers using NAND controllers to expolit the performance of the nvSRAMs.”

The 16 Mb nvSRAM family is sampling today, with production expected in the third quarter of 2014. The ONFI 1.0 devices operate on a 3V power supply, 1.8V IO supply, in data bus widths of 8 bits and 16 bits, and are available in a 165-ball