M27C256B-90B6 by STMicroelectronics Design and production,in Shenzhen Jungu Technology Electronics Co., Ltd. Spot sales,And can pass Shenzhen Jungu Technology Electronics Co., Ltd. Purchasing。M27C256B-90B6 Price reference $ 0。M27C256B-90B6 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information M27C256B-90B6 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial