LM339D by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。LM339D Price reference $ 0.420000。LM339D - 。You can download LM339D Chinese information、Pin map、DatasheetData sheet function specification,In the information LM339D Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial