The LY625128SL-55LLI is a 4Mb (512K x 8) SRAM chip manufactured by Lyontek. It is a parallel SOP-32 (small outline plastic package) integrated circuit that is RoHS compliant (Restrictions on the use of Hazardous Substances). This chip is used for random access memory, and it has access times as low as 55ns. It also includes data write protect, active low chip select, active low output enable, and low power consumption. It has a wide operating voltage range between 4V and 5.5V. This part is suitable for use in a variety of applications including industrial control, communication systems, automotive systems, aircraft systems, and instrumentation.