LM393N by Texas Instruments(TI) Design and production,in Ruishengda Information Technology Co., Limited Spot sales,And can pass Ruishengda Information Technology Co., Limited Purchasing。LM393N Price reference $ 0。LM393N - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM393N Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial