HMC994A by Analog Devices Inc.(ADI) Design and production,in Shenzhen Yirenxin Technology Co., Ltd. Spot sales,And can pass Shenzhen Yirenxin Technology Co., Ltd. Purchasing。HMC994A Price reference $ 189.176000。HMC994A - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information HMC994A Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial