STK11C68 64-Kbit (8 K 8) SoftStore nvSRAM Features Functional Description 25 ns, 35 ns, and 45 ns access times The Cypress STK11C68 is a 64Kb fast static RAM with a nonvol- atile element in each memory cell. The embedded nonvolatile Pin compatible with industry standard SRAMs elements incorporate QuantumTrap technology producing the worlds most reliable nonvolatile memory. The SRAM provides Software initiated nonvolatile STORE unlimited read and write cycles, while independent nonvolatile Unlimited Read and Write endurance data resides in the highly reliable QuantumTrap cell. Data transfers under software control from SRAM to the nonvolatile Automatic RECALL to SRAM on power up elements (the STORE operation). On power up, data is automat- Unlimited RECALL cycles ically restored to the SRAM (the RECALL operation) from the nonvolatile memory. RECALL operations are also available 1,000,000 STORE cycles under software control. 100 year data retention For a complete list of related documentation, click here. Single 5 V+10% operation Commercial and industrial temperature 28-pin (330 mil) SOIC package 28-pin (300 mil) CDIP and 28-pad (350 mil) LCC packages RoHS compliance Logic Block Diagram V V CC CAP Quantum Trap 128 X 512 A 5 POWER STORE CONTROL A 6 A 7 RECALL STORE/ STATIC RAM A RECALL HSB 8 ARRAY CONTROL 128 X 512 A 9 A 11 SOFTWARE A 12 A - A DETECT 0 12 DQ COLUMN I/O 0 DQ 1 COLUMN DEC DQ 2 DQ 3 DQ 4 DQ A A A A A A 5 0 1 2 3 4 10 DQ 6 DQ 7 OE CE WE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-50638 Rev. *F Revised March 24, 2015 INPUT BUFFERS ROW DECODER Not recommended for new designs. In production to support ongoing production programs only. STK11C68 Contents Pin Configurations ........................................................... 3 AC Test Conditions .......................................................... 7 Pin Definitions .................................................................. 3 AC Switching Characteristics ......................................... 8 Device Operation .............................................................. 4 SRAM Read Cycle ...................................................... 8 SRAM Read ....................................................................... 4 SRAM Write Cycle....................................................... 9 SRAM Write ....................................................................... 4 AutoStore INHIBIT or Power Up RECALL .................... 10 Software STORE............................................................... 4 Software Controlled STORE/RECALL Cycle................ 11 Software RECALL............................................................. 4 Part Numbering Nomenclature...................................... 12 Hardware RECALL (Power Up)........................................ 4 Ordering Information...................................................... 12 Hardware Protect.............................................................. 4 Package Diagrams.......................................................... 13 Noise Considerations....................................................... 4 Acronyms........................................................................ 16 Low Average Active Power.............................................. 4 Document Conventions ................................................. 16 Best Practices................................................................... 5 Units of Measure ....................................................... 16 Maximum Ratings............................................................. 6 Document History Page................................................. 17 Operating Range............................................................... 6 Sales, Solutions, and Legal Information ...................... 18 DC Electrical Characteristics .......................................... 6 Worldwide Sales and Design Support....................... 18 Data Retention and Endurance ....................................... 6 Products .................................................................... 18 Capacitance ...................................................................... 7 PSoC Solutions ......................................................... 18 Thermal Resistance.......................................................... 7 Document Number: 001-50638 Rev. *F Page 2 of 18 Not recommended for new designs. In production to support ongoing production programs only.