ULN2004AN by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。ULN2004AN Price reference $ 0.760000。ULN2004AN - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information ULN2004AN Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial