FM4442 is memory card has 256x8 Bits EEPROM with write protect function and programmable security code. With its contact configuration in accordance to ISO 7816 standard (synchronous transmission), FM4442 can be widely used in different types of IC memory cards.

4428 chip card main indicators: 1024 bytes of EEPROM, 1024 bytes of write protected area (fixed data), 2 bytes of password, error count 8 times, temperature range: -35 ℃~80 ℃, at least 100000 erasure cycles, at least 10 years of data retention period

The internal structure of PSAM COS consists of five parts: CPU and encryption logic, RAM, ROM, EEPROM, and I/O, making it a complete computer security system. User data is stored in an EEPROM protected by encrypted logic, with a COS mask in the ROM to ensure code security.