LM393N by STMicroelectronics Design and production,in Shenzhen HYLX Technology Ltd. Spot sales,And can pass Shenzhen HYLX Technology Ltd. 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