The FM4442​ is a 256-byte contact-type logic encryption memory card chip​ developed by Shanghai Fudan Microelectronics Group (FMSH). It is a pin-to-pin and function-compatible domestic replacement for the Siemens ..

The FM4442​ is a 256-byte contact-type logic encryption memory card chip​ developed by Shanghai Fudan Microelectronics Group (FMSH). It is a pin-to-pin and function-compatible domestic replacement for the S..