TDA7561 by STMicroelectronics Design and production,in Shenzhen HYLX Technology Ltd. Spot sales,And can pass Shenzhen HYLX Technology Ltd. Purchasing。TDA7561 Price reference $ 8.690000。TDA7561 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information TDA7561 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial