INTELLIGENT 1024BYTE EEPROM with Write Protection and Programmable Security Code (PSC) and with ISO 7816 smart card interface. SLE 5528 is fully functional compatible with SLE 4428 and can easily replace the previous product in any application.To ensure the future availability of this product type, whilst still ensuring backward compatibility to previous products, Infineon has migrated the data carrier family to the IMEM CMOS technology.IMEM is conceived for security applications and offers unsurpassed physical and electrical protection schemes. IMEM is recommended for use with Infi neon’s advanced FCOS (Flip Chip On Substrate) module package.