Cypress STK16C88-3 manual Features, Functional Description, Logic Block Diagram

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STK16C88-3

256 Kbit (32K x 8) AutoStore+ nvSRAM

Features

■Fast 35ns Read access and R/W cycle time

■Directly replaces battery-backed SRAM modules such as Dallas/Maxim DS1230W

■Automatic nonvolatile STORE on power loss

■Nonvolatile STORE under Software control

■Automatic RECALL to SRAM on power up

■Unlimited Read/Write endurance

■1,000,000 STORE cycles

■100 year data retention

■Single 3.3V+0.3V power supply

■Commercial and Industrial Temperatures

■28-pin (600 mil) PDIP package

■RoHS compliance

Functional Description

The Cypress STK16C88-3 is a 256Kb 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

Cypress Semiconductor Corporation • 198 Champion Court

•

San Jose, CA 95134-1709

•

408-943-2600

Document Number: 001-50594 Rev. **

 

Revised January 29, 2009

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Contents Logic Block Diagram FeaturesFunctional Description Cypress Semiconductor Corporation 198 Champion CourtWrite Enable Input, Active LOW. When the chip is enabled Pin ConfigurationsOutput Enable, Active LOW. The active LOW Power Supply Inputs to the DeviceDevice Operation Hardware Recall Power UpSram Read Sram WriteHardware Protect Low Average Active PowerNoise Considerations Best Practices0x0E38 Read Sram Output Data Software STORE/RECALL Mode Selection 13 aRead Sram Output Data 0x03E0 Read Sram Output Data 0x303FMaximum Ratings DC Electrical CharacteristicsOperating Range Data Retention and EnduranceAC Test Conditions CapacitanceThermal Resistance Description Test Conditions Max UnitSwitching Waveforms AC Switching CharacteristicsSram Read Cycle Parameter Description 35 ns Unit Cypress Alt Min MaxData Setup to End of Write Chip Enable To End of WriteAddress Setup to End of Write Address Setup to Start of WritePower up Recall Duration AutoStorePlus or Power Up RecallLow Voltage Reset Level Parameter Alt Description STK16C88-3 Unit Min MaxParameter Alt Description 35 ns Unit Min Software Controlled STORE/RECALL CycleOrdering Information Part Numbering Nomenclature STK16C88 3W F 35Pin 600 Mil Pdip Package DiagramsWorldwide Sales and Design Support Products PSoC Solutions Sales, Solutions and Legal InformationNew data sheet Document History
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