Cypress Semiconductor STK16C88, User Manual

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STK16C88
256 Kbit (32K x 8) Au nvSRAM
Cypress Semiconductor Corporation • 198 Champion Court • San Jose
,
CA 95134-1709 • 408-943-2600
Document Number: 001-50595 Rev. ** Revised January 29, 2009
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
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.
Logic Block Diagram
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