U635H256

U635H256 PowerStore 32K x 8 nvSRAM Features F High-performance CMOS non- volatile static RAM 32768 x 8 bits F 25, 35 and 45 ns Access Times F 10, 15 and 20 ns Output Enable Access Times F ICC = 15 mA at 200 ns Cycle Time F Automatic STORE to EEPROM on Power Down using system capacitance F Software initiated STORE F Automatic STORE Timing F 105 STORE cycles to EEPROM F 10 years data retention in EEPROM F Automatic RECALL on Power Up F Software RECALL Initiation F Unlimited RECALL cycles from EEPROM F Single 5 V ± 10 % Operation F Operating temperature range: 0 to 70 °C -40 to 85 °C F CECC 90000 Quality Standard F ESD characterization according MIL STD 883C M3015.7-HB (classification see IC Code F Numbers) Packages: PDIP28 (300 mil) PDIP28 (600 mil) SOP28 (330 mil) Description The U635H256 has two separate modes of operation: SRAM mode and nonvolatile mode. In SRAM mode, the memory operates as an ordinary static RAM. In nonvolatile operation, data is transferred in parallel from SRA...