M5M51008DKV-70H CMOS Static RAM IC 1048576-Bit Mitsubishi
Major Brands BS62LV4006PIP-55 Very Low Power CMOS Static RAM, 512K x 8 Organization, PDIP-32: Electronic Components: Amazon.com: Industrial & Scientific
5pcs K6x4008c1f-bf55 Sop-32 K6x4008c1f Bf55 Tsop-32 Memory Chips 512kx8 Bit Low Power Full Cmos Static Ram - Integrated Circuits - AliExpress