PIC16C74B-20/PQ by MICROC Design and production,in INSO(INCREDIBLE SOLUTION) Spot sales,And can pass INSO(INCREDIBLE SOLUTION) Purchasing。PIC16C74B-20/PQ Price reference $ 0。PIC16C74B-20/PQ - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information PIC16C74B-20/PQ Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial