AT89C2051-12PU by Microchip Design and production,in CHIPS-ORIGIN ELECTRONICS CO.,LIMITED Spot sales,And can pass CHIPS-ORIGIN ELECTRONICS CO.,LIMITED Purchasing。AT89C2051-12PU Price reference $ 1.999200。AT89C2051-12PU - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AT89C2051-12PU Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial