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Functional Description

The Cypress STK16C88 is a 256 Kb fast static RAM with a nonvolatile element in each memory cell. The embedded nonvolatile elements incorporate QuantumTrap? technology producing 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 from the SRAM to the nonvolatile elements (the STORE operation) takes place automatically at power down. On power up, data is restored to the SRAM (the RECALL operation) from the nonvolatile memory. Both the STORE and RECALL operations are also available under software control.

Features

■25 ns and 45 ns access times

■Directly replaces battery-backed SRAM modules such as Dallas/Maxim DS1230 AB

■Automatic nonvolatile STORE on power loss

■Nonvolatile STORE under Software control

■Automatic RECALL to SRAM on power up

■Unlimited Read/Write endurance

■Unlimited RECALL cycles

■1,000,000 STORE cycles

■100 year data retention

■Single 5V+10 power supply

■Commercial and Industrial Temperatures

■28-pin (600 mil) PDIP package

■RoHS compliance