L297/1 by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。L297/1 Price reference $ 8.390000。L297/1 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information L297/1 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial