4 Mbit Flash + 1 Mbit / 256 Kbit SRAM ComboMemory The SST31LF041/041A devices are a 512K x8 CMOS flash memory bank combined with a 128K x8 CMOS SRAM memory bank manufactured with SST's proprietary, high performance SuperFlash technology. The SST31LF041/041A devices write (SRAM or flash) with a 3.0-3.6V power supply. The monolithic SST31LF041/041A devices conform to Software Data Protect (SDP) commands for x8 EEPROMs.... More about this product.