Functional Description
The Cypress STK11C68-5 is a 64 Kb fast static RAM with a nonvolatile element in each memory cell. The embedded nonvolatile elements incorporate QuantumTrap technology to produce the world’s most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while independent nonvolatile data resides in the highly reliable QuantumTrap cell. Data transfers under software control from SRAM to the nonvolatile elements (the STORE operation). On power up, data is automatically restored to the SRAM (the RECALL operation) from the nonvolatile memory. RECALL operations are also available under software control.

Features
■ 35 ns, 45 ns, and 55 ns access times
■ Pin compatible with industry standard SRAMs
■ Software initiated nonvolatile STORE
■ Unlimited Read and Write endurance
■ Automatic RECALL to SRAM on power up
■ Unlimited RECALL cycles
■ 1,000,000 STORE cycles
■ 100 year data retention
■ Single 5V ± 10% operation
■ Military temperature
■ 28-pin (300 mil) CDIP and 28-pad LCC packages