Serial EERAM: SRAM that Doesn’t Lose Data on Power Down

EERAM offers unlimited writes to the SRAM array, allowing you to constantly write to the device. Since power loss events are typically random or unpredictable, EERAM works in applications that absolutely cannot lose the quickly changing SRAM data on any sudden power loss. It provides designers of data logging/black box or monitoring systems with a safe and accurate way to safely, reliably and automatically store the last data bytes prior to the power loss event. The capacitor connected to the VCAP pin provides the necessary energy to safely copy the RAM’s contents to the secure nonvolatile backup on power loss. Upon power-up, data is recalled automatically from the nonvolatile cells to the SRAM.

• Reliably preserves data through any power loss event
• Automatically and safely stores data on power loss
• Restores data automatically to SRAM on each power up
• No battery needed
• Unlimited reads and writes to standard serial SRAM memory
  • Write to the memory as often as you choose
  • Read from the memory as often as you choose
  • Writes and Reads can be random access one byte at a time or can be bursts of reads and writes
• Lowest-cost nonvolatile SRAM solution by using standard CMOS memory cells for both SRAM and nonvolatile
  • Notably less expensive than competing FRAM and nvSRAM technologies
• Low power consumption