LM324ADT by STMicroelectronics Design and production,in TanJiayuan Electronics Spot sales,And can pass TanJiayuan Electronics Purchasing。LM324ADT Price reference ¥ 1.194995。LM324ADT - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM324ADT Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial