LM393AD by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。LM393AD Price reference $ 0.410000。LM393AD - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM393AD Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial