M4T28-BR12SH1 by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。M4T28-BR12SH1 Price reference $ 4.620000。M4T28-BR12SH1 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information M4T28-BR12SH1 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial