LM339DR by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。LM339DR Price reference $ 0.099000。LM339DR - 。You can download LM339DR Chinese information、Pin map、DatasheetData sheet function specification,In the information LM339DR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial