LM324DR by Texas Instruments(TI) Design and production,in Tailai Electronics Co., Limited Spot sales,And can pass Tailai Electronics Co., Limited Purchasing。LM324DR Price reference $ 0.100650。LM324DR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM324DR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial