LM311P by Texas Instruments(TI) Design and production,in Shenzhen Nanyuxin Electronics Co., Ltd. Spot sales,And can pass Shenzhen Nanyuxin Electronics Co., Ltd. Purchasing。LM311P Price reference $ 0.592163。LM311P - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM311P Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial