MCP23017T-E/ML by Microchip Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。MCP23017T-E/ML Price reference $ 1.123510。MCP23017T-E/ML - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information MCP23017T-E/ML Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial