LM293D by STMicroelectronics Design and production,in Ruishengda Information Technology Co., Limited Spot sales,And can pass Ruishengda Information Technology Co., Limited Purchasing。LM293D Price reference $ 1.330000。LM293D - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM293D Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial