The FM4428​ is a 1 KB 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 SLE4..

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..

FM5528​ (also known as Fudan Micro FM5528) is a low-cost, contact-type logic encryption memory card IC​ manufactured by Shanghai Fudan Microelectronics. It is a drop-in replacement and functional clone​ of the pop..