Storage capacitor options for Cypress nvSRAM

The Cypress nvSRAM is the most reliable non-volatile RAM solution. There are a few factors to be considered when selecting a storage capacitor. The user has a wide range of options, depending on the desired size, cost, reliability and other conditions to which the system is subject to. The device operation is independent of the capacitor type until it meets the datasheet specification.

The nvSRAM architecture uses a one-to-one pairing of a non-volatile bit and a fast SRAM bit in each memory cell. During operation, the ICs behave exactly as standard fast SRAMs and are easily interfaced to existing microprocessors and MCUs. When IC power is disrupted or lost, the event is detected. In one quick array write, every SRAM bit is saved into the nonvolatile part (in under 13ms) using the saved energy in a small capacitor. Data is automatically recalled from the nonvolatile part to SRAM on power restore.

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