U634H256

U634H256 PowerStore 32K x 8 nvSRAM Features Description ! High-performance CMOS nonvolatile static RAM 32768 x 8 bits ! 25, 35 and 45 ns Access Times ! 10, 15 and 20 ns Output Enable Access Times ! ICC = 15 mA typ. at 200 ns Cycle Time ! Automatic STORE to EEPROM on Power Down using external capacitor ! Hardware or Software initiated STORE (STORE Cycle Time < 10 ms) ! Automatic STORE Timing ! 105 STORE cycles to EEPROM ! 10 years data retention in EEPROM ! Automatic RECALL on Power Up ! Software RECALL Initiation (RECALL Cycle Time < 20 µs) ! Unlimited RECALL cycles from EEPROM ! Single 5 V ± 10 % Operation ! Operating temperature ranges: 0 to 70 °C -40 to 85 °C -40/-55 to 125 °C (only 35 ns) ! QS 9000 Quality Standard ! ESD protection > 2000 V (MIL STD 883C M3015.7-HBM) ! Packages: SOP32 (300 mil), PDIP32 (600 mil, only C/K-Type) The U634H256 has two separate modes of operation: SRAM mode and nonvolatile mode. In SRAM mode, the memory operates as an ordinary static RAM. In no...