LM339NSR by Texas Instruments(TI) Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。LM339NSR Price reference $ 0.125400。LM339NSR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM339NSR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial