STA311BTR by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。STA311BTR Price reference $ 3.671200。STA311BTR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information STA311BTR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial