OPA2544T by Texas Instruments(TI) Design and production,in Shenzhen Yirenxin Technology Co., Ltd. Spot sales,And can pass Shenzhen Yirenxin Technology Co., Ltd. Purchasing。OPA2544T Price reference $ 23.450000。OPA2544T - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information OPA2544T Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial