The MAX66140 combines 1024 bits of user EEPROM with secure hash algorithm (SHA-1) challenge-and- response authentication (ISO/IEC 10118-3 SHA-1), a 64-bit unique identifier (UID), one 64-bit secret, and a 13.56MHz ISO 15693 RF interface in a single chip. It provides secure, symmetric authentication for both reading and writing to the device and supports various features defined by ISO 15693 such as data rates, modulation indices, subcarrier modes, selected state, application family identifier (AFI), data storage format identifier (DSFID), and the Option_flag bit for read operations.
