... AT24C01,AT24C16,AT24C64 etc Commonly used ICsFrequency:125khz and 13.56MHz and UHFChips:125Khz13.56Mhz860Mhz to 960Mhz H4102mifare standard ... this type.Regular smart cards chip: NXP Mifare 1K S50, NXP Mifare 4K S70, Mifare Ultralight, Mifare Desfire, Infineon, TI, FM11RF08, EM4100/4102 ... LF, HF, UF, VF for selection 13.56MHZ High frequency,Mifare S50/70 ultralight desfire D21/41/8 plus,RFID card/tag