PIC18F4431-I/P by Microchip Design and production,in GUI XIN Group (Hong Kong) Limited Spot sales,And can pass GUI XIN Group (Hong Kong) Limited Purchasing。PIC18F4431-I/P Price reference $ 6.256000。PIC18F4431-I/P - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information PIC18F4431-I/P Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial