STK12C68-5 (SMD5962-94599) 64 Kbit (8 K x 8) AutoStore nvSRAM Features Functional Description 35 ns and 55 ns access times The Cypress STK12C68-5 is a fast static RAM with a nonvolatile element in each memory cell. The embedded Hands off automatic STORE on power down with external nonvolatile elements incorporate QuantumTrap technology 68 F capacitor producing the worlds most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while STORE to QuantumTrap nonvolatile elements is initiated independent nonvolatile data resides in the highly reliable by software, hardware, or AutoStore on power down QuantumTrap cell. Data transfers from the SRAM to the RECALL to SRAM initiated by software or power up nonvolatile elements (the STORE operation) takes place automatically at power down. On power up, data is restored to Unlimited Read, Write, and Recall cycles the SRAM (the RECALL operation) from the nonvolatile 1,000,000 STORE cycles to QuantumTrap memory. Both the STORE and RECALL operations are also available under software control. A hardware STORE is 100 year data retention to QuantumTrap initiated with the HSB pin. Single 5 V + 10% operation For a complete list of related documentation, click here. Military temperature 28-pin (300mil) CDIP and 28-pad LCC packages 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 A 128 X 512 9 A 11 SOFTWARE A 12 A - A DETECT 0 12 DQ 0 COLUMN I/O DQ 1 COLUMN DEC DQ 2 DQ 3 DQ 4 DQ A A A A A A 5 0 1 3 4 10 2 DQ 6 DQ 7 OE CE WE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-51026 Rev. *C Revised April 2, 2015 INPUT BUFFERS ROW DECODER STK12C68-5 (SMD5962-94599) Contents Pinouts .............................................................................. 3 Data Retention and Endurance ....................................... 9 Pin Definitions .................................................................. 3 Capacitance ...................................................................... 9 Device Operation .............................................................. 4 Thermal Resistance.......................................................... 9 SRAM Read ....................................................................... 4 AC Test Conditions .......................................................... 9 SRAM Write ....................................................................... 4 SRAM Read Cycle .................................................... 10 AutoStore Operation ........................................................ 4 SRAM Write Cycle..................................................... 11 AutoStore Inhibit Mode .................................................... 5 AutoStore or Power Up RECALL .................................. 12 Hardware STORE (HSB) Operation................................. 5 Software Controlled STORE/RECALL Cycle................ 13 Hardware RECALL (Power Up)........................................ 5 Switching Waveform ...................................................... 14 Software STORE............................................................... 5 Part Numbering Nomenclature...................................... 15 Software RECALL............................................................. 5 Ordering Information...................................................... 16 Data Protection ................................................................. 6 Acronyms........................................................................ 17 Noise Considerations....................................................... 6 Document Conventions ................................................. 17 Hardware Protect.............................................................. 6 Units of Measure ....................................................... 17 Low Average Active Power.............................................. 6 Document History Page ................................................ 18 Preventing Store............................................................... 6 Sales, Solutions, and Legal Information ...................... 18 Best Practices................................................................... 7 Worldwide Sales and Design Support....................... 18 Maximum Ratings............................................................. 8 Products .................................................................... 18 Operating Range .............................................................. 8 PSoC Solutions ......................................................... 18 DC Electrical Characteristics .......................................... 8 Document Number: 001-51026 Rev. *C Page 2 of 18