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STK20C04-W35 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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STK20C04-W35 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 8 page STK20C04 2-39 DESCRIPTION The Simtek STK20C04 is a fast static RAM (30, 35, 45ns), with a nonvolatile electrically-erasable PROM (EEPROM) 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 EEPROM. Data may easily be transferred from the SRAM to the EEPROM (STORE), or from the EEPROM to the SRAM (RECALL) using the NE pin. It combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity. The STK20C04 features the industry standard pinout for nonvolatile RAMs in a 28-pin 600 mil plastic DIP. PIN NAMES A0 - A8 Address Inputs W Write Enable DQ0 - DQ7 Data In/Out E Chip Enable G Output Enable NE Nonvolatile Enable VCC Power (+5V) VSS Ground STK20C04 CMOS nvSRAM High Performance 512 x 8 Nonvolatile Static RAM FEATURES • 30, 35 and 45ns Access Times • 15, 20 and 25ns Output Enable Access • Unlimited Read and Write to SRAM • Hardware STORE Initiation • Automatic STORE Timing • 105 STORE cycles to EEPROM • 10 year data retention in EEPROM • Automatic RECALL on Power Up • Hardware RECALL Initiation • Unlimited RECALL cycles from EEPROM • Single 5V ±10% Operation • Commercial and Industrial Temperatures • Available in 600 mil PDIP package 28 27 26 25 24 23 22 21 20 19 18 17 16 15 DQ DQ DQ DQ DQ V W NC A NC NC G NC E 8 7 6 5 4 3 CC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NE NC A A A A A A A A DQ DQ DO VSS 7 6 5 4 3 2 1 0 0 1 2 LOGIC BLOCK DIAGRAM PIN CONFIGURATIONS 28 - 600 PDIP A A A A A A 3 4 5 6 7 8 EEPROM ARRAY 64 X 64 STORE RECALL STATIC RAM ARRAY 64 X 64 STORE/ RECALL CONTROL AA A 01 2 DQ DQ DQ DQ DQ DQ DQ DQ 0 1 2 3 4 5 6 7 G NE E W COLUMN I/O COLUMN DECODER |
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