SN74LS00DR by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。SN74LS00DR Price reference $ 0.221850。SN74LS00DR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SN74LS00DR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial