M74HC161B1R by ST Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。M74HC161B1R Price reference $ 0。M74HC161B1R - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information M74HC161B1R Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial