AT28HC256-70SU by Microchip Design and production,in GUI XIN Group (Hong Kong) Limited Spot sales,And can pass GUI XIN Group (Hong Kong) Limited Purchasing。AT28HC256-70SU Price reference $ 11.445200。AT28HC256-70SU - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AT28HC256-70SU Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial