STK11C48

STK11C48 2K x 8 nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM FEATURES 25ns, 35ns and 45ns Access Times STORE to Nonvolatile Elements Initiated by Software RECALL to SRAM Initiated by Software or Power Restore 10mA Typical ICC at 200ns Cycle Time Unlimited READ, WRITE and RECALL Cycles 1,000,000 STORE Cycles to Nonvolatile Elements 100-Year Data Retention in Nonvolatile Elements Commercial and Industrial Temperatures 28-Pin 300 mil PDIP, 300 mil SOIC and 350 mil SOIC Packages DESCRIPTION The Simtek STK11C48 is a fast static RAM with a nonvolatile element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent, nonvolatile data resides in the Nonvolatile Elements. Data transfers from the SRAM to the Nonvolatile Elements (the STORE operation), or from Nonvolatile Elements to SRAM (the RECALL operation), take place using a software sequence. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) also take place automatically on restoration of power. BLOCK DIAGRAM Quantum Trap 32 x 512 ROW DECODER PIN CONFIGURATIONS NC NC A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 A5 A6 A7 A8 A9 STORE STATIC RAM ARRAY 32 x 512 RECALL STORE/ RECALL CONTROL SOFTWARE DETECT DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 INPUT BUFFERS COLUMN I/O COLUMN DEC A0 - A10 VCC W NC A8 A9 NC G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 28 - 300 PDIP 28 - 3...