OPA2277U by Texas Instruments(TI) Design and production,in Ruishengda Information Technology Co., Limited Spot sales,And can pass Ruishengda Information Technology Co., Limited Purchasing。OPA2277U Price reference $ 9.510000。OPA2277U - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information OPA2277U Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial