STK14D88-3 Datasheet | Simtek

FEATURES - 25ns, 35ns and 45ns Access Times - “Hands-off” Automatic STORE on Power Down with only a small capacitor - STORE to Quantum Trap™ Nonvolatile Elements is Initiated by Software , device pin or Auto Store™ on Power Down - RECALL to SRAM Initiated by Software or Power Restore - Unlimited READ, WRITE and RECALL Cycles - 5m A Typical ICC at 200ns Cycle Time - 1,000,000 STORE Cycles to Quantum Trap™ - 100-Year Data Retention to Quantum Trap™ - Single 3V +20%, -10% Operation - mercial and Industrial Temperatures - SSOP and SOIC Packages - Ro HS pliance DESCRIPTION The Simtek STK14D88-3 is a fast static RAM with a nonvolatile element in each memory cell. The embedded nonvolatile elements incorporate Simtek’s Quantum Trap™ technology producing the world’s most reliable nonvolatile memory. The SRAM provides unlimited read and write cycles, while independent, nonvolatile data resides in the TM highly reliable Quantum Trap 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. BLOCK DIAGRAM A5 A6 A7 A8 A9 A11 A12 A13 A14 Quatum Trap 512 X 512 ROW DECODER STORE STATIC RAM ARRAY 512 X 512 RECALL VCC VCAP POWER CONTROL STORE/ RECALL CONTROL SOFTWARE DETECT INPUT BUFFERS COLUMN I/O COLUMN DEC A13 - A0 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 A 0 A 1 A 2 A 3 A 4 A10 Figure 1. Block Diagram January 2005 Document Control #ML0033 rev 1.1 PACKAGES VCAP A14 A12 A7 A6 A5 A4 DQ0 A3 A2 A1 A0 DQ1 DQ2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 VCC HSB W A13 A8 A9 A11 VCAP A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS DQ6 G A10 E DQ7 DQ5 DQ4 DQ3 VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25...