L78S18CV by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。L78S18CV Price reference $ 0.910000。L78S18CV - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information L78S18CV Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial