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1 / 13 page December 2002 1 Document Control # ML0014 rev 0.0 PIN CONFIGURATIONS VCAP A14 A12 A7 A6 A5 A4 A3 NC A2 A1 A0 DQ0 DQ1 DQ2 VSS VCCX HSB A13 A8 A9 A11 G NC A10 E DQ7 DQ6 DQ5 DQ4 DQ3 W 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 32 - LCC 32 - DIP 32 - SOIC PIN NAMES A0 - A14 Address Inputs DQ0 -DQ7 Data In/Out E Chip Enable W Write Enable G Output Enable HSB Hardware Store Busy (I/O) VCCX Power (+ 5V) VCAP Capacitor VSS Ground STK14C88 32K x 8 AutoStore™nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM FEATURES • 25ns, 35ns and 45ns Access Times • “Hands-off” Automatic STORE with External 68 µF Capacitor on Power Down • STORE to nonvolatile elements Initiated by Hardware, Software or AutoStore™ • RECALL to SRAM Initiated by Software or Power Restore • 10mA Typical I CC at 200ns Cycle Time • Unlimited READ, WRITE and RECALL Cycles • 1,000,000 STORE Cycles to nonvolatile ele- ments (Commercial/Industrial) • 100-Year Data Retention in nonvolatile ele- ments (Commercial/Industrial) • Single 5V + 10% Operation • Commercial, Industrial and Military Tempera- tures • 32-Pin SOIC, DIP and LCC Packages DESCRIPTION The Simtek STK14C88 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, non- volatile data resides in the nonvolatile elements. Data transfers from the SRAM to the nonvolatile ele- ments (the STORE operation) can take place auto- matically on power down. A 68 µF or larger capacitor tied from V CAP to ground guarantees the STORE operation, regardless of power-down slew rate or loss of power from “hot swapping”. Transfers from the nonvolatile elements to the SRAM (the RECALL operation) take place automatically on restoration of power. Initiation of STORE and RECALL cycles can also be software controlled by entering specific read sequences. A hardware STORE may be initiated with the HSB pin. BLOCK DIAGRAM A0 A1 A2 A3 A4 A10 COLUMN I/O COLUMN DEC STATIC RAM ARRAY 512 x 512 Quantum Trap 512 x 512 STORE/ RECALL CONTROL STORE RECALL POWER CONTROL A5 A6 A7 A8 A9 A11 A12 A13 A14 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 SOFTWARE DETECT G E W HSB VCCX VCAP A0 - A13 |
Số phần tương tự - STK14C88-W45 |
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Mô tả tương tự - STK14C88-W45 |
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