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STK25CA8-D45I Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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STK25CA8-D45I Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 8 page August 1999 6-1 PIN CONFIGURATIONS PIN NAMES A0 - A16 Address Inputs W Write Enable DQ0 - DQ7 Data In/Out E Chip Enable G Output Enable VCC Power (+ 5V) VSS Ground A13 A8 A9 A11 NC A16 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS VCC A15 W A10 E DQ7 DQ6 DQ5 DQ4 DQ3 NC 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 A14 VCC A15 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 NC STK25CA8 128K x 8 AutoStore™ nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM Module FEATURES • Nonvolatile Storage without Battery Problems • Directly Replaces 128K x 8 Static RAM, Battery- Backed RAM or EEPROM • 35ns and 45ns Access Times • STORE to EEPROM Initiated by AutoStore™ on Power Down • RECALL to SRAM on Power Restore • 22mA I CC at 200ns Cycle Time • Unlimited READ, WRITE and RECALL Cycles • 1,000,000 STORE Cycles to EEPROM • 100-Year Data Retention Over Full Commercial Temperature Range • Commercial and Industrial Temperatures • 32-Pin 600 mil Dual In-Line Module DESCRIPTION The Simtek STK25CA8 is a fast static RAM with a nonvolatile, electrically erasable PROM 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 EEPROM. Data transfers from the SRAM to the EEPROM (the STORE operation) can take place auto- matically on power down using charge stored in sys- tem capacitance. Transfers from the EEPROM to the SRAM (the RECALL operation) take place automati- cally on restoration of power. BLOCK DIAGRAM A6 A7 A2 COLUMN I/O COLUMN DEC STATIC RAM ARRAY 512 x 512 EEPROM ARRAY 512 x 512 STORE/ RECALL CONTROL POWER CONTROL A11 A12 A13 A14 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 VCC G E W A9 A8 A10 A3 A0 A1 A4 A5 A15 A16 MODULE DECODER 512 x 512 STORE RECALL 32 - 600 mil Dual In-Line Module |
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