1 Features

• Low-frequency (LF) immobilizer interface
  • 75-byte EEPROM
  • 80-bit DST80 security authentication coprocessor
  • Integrated batteryless immobilizer interface
  • Half duplex (HDX) immobilizer communication achieves up to 4-in (10-cm) read range
  • Special selective addressing mode allows reliable learn-in sequence
  • 80-bit authentication key length
  • Up to 8-kbit/s uplink data rate
  • 5- or 3-byte challenge/response algorithm
  • Fast authentication within 42 ms
  • Fast mutual authentication within 65 ms
  • 75-byte EEPROM
    • 48-bytes of available EEPROM user memory
    • 32-bit unique serial number
    • High EEPROM security and flexibility
    • Write-only authentication keys
    • Pages are irreversibly lockable and protectable
    • Protected pages programmable only through mutual authentication
  • Each user page is lockable
  • Resonant frequency: 134.2 kHz