TMS37145 Datasheet | Texas Instruments

SCBS879A - MAY 2012 - REVISED JANUARY 2020 Digital Signature Transponder With Integrated DST80 Authentication, EEPROM, and LF Immobilizer 1 Features - 1 Low-frequency (LF) immobilizer interface - 75-byte EEPROM - 80-bit DST80 security authentication coprocessor - Integrated batteryless immobilizer interface - Half duplex (HDX) immobilizer munication 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 k Hz 3 Description This security RFID transponder provides an 80-bit encryption algorithm. The 5-byte challenge and 3byte response algorithm is backward patible with existing TI products and provides, together with the burst length coding, short encryption telegram times. The DST80 offers 65 bytes of free programmable user data stored in nine pages, each of them lockable for programming. Each of the two 80-bit encryption keys with can be programmed with a single telegram. The DST80 es in two versions, preprogrammed with either PWM or PPM munication formats, eliminating the need for the user to change this field. For a higher security level, the DSTAES transponder with AES-128 encryption is...