RF EEPROM Memory

The CryptoRF family integrates a 13.56MHz RF interface with Crypto Memory security features. This product line is ideal for RF tags and contactless smart cards that can benefit from advanced security and cryptographic features. The device is optimized as a contactless secure memory for secure data storage without the requirement of an internal microprocessor. For communications, the RF interface utilizes the ISO/IEC 14443-2 and -3 Type B bit timing and signal modulation schemes, and the ISO/IEC 14443-3 Slot-MARKER Anti-collision Protocol. Data is exchanged half duplex at a 106-kbit per second rate, with a two byte CRC_B providing error detection capability. The RF interface powers the other circuits, no battery is required. Full compliance with the ISO/IEC 14443 -2 and 14443 -3 standards provides both a proven RF communication interface and a robust anti-collision protocol. The five products in the CryptoRF family contain 4 to 64 kilobits of user memory plus two kilobits of configuration memory. The two kilobits of configuration memory contains: Read/Write password sets Four crypto key sets Security access registers for each user zone Password/Key registers for each zone The CryptoRF command set is optimized for a multi-card RF communications environment. A programmable AFI register allows this IC to be used in numerous applications in the same geographic area with seamless discrimination of cards assigned to a particular application during the anti-collision process.

• A Family of devices with user memory of 4 kilobits to 64 kilobits
• Contactless 13.56MHz RF communications interface
  • ISO/IEC 14443-2:2001 Type B Compliant
  • ISO/IEC 14443-3:2001 Type B Compliant Anti-collision Protocol
  • Tolerant of Type A Signaling for multi-protocol applications
• Integrated 82pF tuning capacitor
• User EEPROM memory configurations:
  • 4 kilobits configured as four 128 byte (1-Kbit) User Zones [AT88RF04C]
  • Byte, page, and partial page write modes
  • Self timed write cycle
• 256 byte (2-Kbit) configuration memory
  • User Programmable Application Family Identifier (AFI)
  • User-defined anti-collision polling response
  • User-defined keys and passwords
  • Read-only unique die serial number
• High security features
  • Selectable access rights by zone
  • 64-bit Mutual Authentication Protocol (under license of ELVA)
  • Encrypted checksum
  • Stream encryption using 64-bit key
  • Four key sets for authentication and encryption
  • Four or eight 24-bit password sets
  • Password and authentication attempts counters
  • Anti-tearing function
  • Tamper sensors
• High reliability
  • Endurance: 100,000 write cycles
  • Data retention: 10 years