LM1881M by Texas Instruments(TI) Design and production,in Shenzhen Nanyuxin Electronics Co., Ltd. Spot sales,And can pass Shenzhen Nanyuxin Electronics Co., Ltd. Purchasing。LM1881M Price reference $ 4.630518。LM1881M - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM1881M Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial