ISO7742DW by Texas Instruments(TI) Design and production,in Shenzhen Yirenxin Technology Co., Ltd. Spot sales,And can pass Shenzhen Yirenxin Technology Co., Ltd. Purchasing。ISO7742DW Price reference $ 6.660000。ISO7742DW - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information ISO7742DW Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial