ST485BDR by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。ST485BDR Price reference $ 0.362600。ST485BDR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information ST485BDR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial