TL431ICT by STMicroelectronics Design and production,in TanJiayuan Electronics Spot sales,And can pass TanJiayuan Electronics Purchasing。TL431ICT Price reference ¥ 4.552363。TL431ICT - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information TL431ICT Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial