SN74HC74D by Texas Instruments(TI) Design and production,in Fidelis Electronics Limited Spot sales,And can pass Fidelis Electronics Limited Purchasing。SN74HC74D Price reference $ 0.410000。SN74HC74D - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SN74HC74D Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial