AT28HC256F-90SU by Microchip Design and production,in GUI XIN Group (Hong Kong) Limited Spot sales,And can pass GUI XIN Group (Hong Kong) Limited Purchasing。AT28HC256F-90SU Price reference $ 10.850000。AT28HC256F-90SU - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AT28HC256F-90SU Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial