ST25TB512-AT Datasheet | STMicroelectronics

Features - ISO 14443-2 Type B air interface pliant - ISO 14443-3 Type B frame format pliant - 13.56 MHz carrier frequency - 847 k Hz subcarrier frequency - 106 Kbit/second data transfer - 8 bit Chip_ID based anticollision system - 2 count-down binary counters with automated anti-tearing protection - 64-bit Unique Identifier - 512-bit EEPROM with write protect feature - Read_block and Write_block (32 bits) - Internal tuning capacitor: 68 p F - 1 million erase/write cycles - 40-year data retention - Self-timed programming cycle - 5 ms typical programming time Application - Transport DS11456 - Rev 8 - February 2023 For further information contact your local STMicroelectronics sales office. .st. Description Description The ST25TB512-AT is a contactless memory, powered by an externally transmitted radio wave. It contains a 512-bit user EEPROM. The memory is organized as 128 blocks of 32 bits. The ST25TB512-AT is accessed via the 13.56 MHz carrier. Ining data are demodulated and decoded from the received amplitude shift keying (ASK) modulation signal and outgoing data are generated by load variation using bit phase shift keying (BPSK) coding of a 847 k Hz sub-carrier. The received ASK wave is 10% modulated. The data transfer rate between the ST25TB512-AT and the reader is 106 kbit/s in both reception and emission modes. The ST25TB512-AT follows the ISO 14443 - 2 Type B remendation for the radio-frequency power and signal interface. Figure 1. Logic diagram 512-bit User EEPROM Power Supply Regulator ASK Demodulator BPSK Load Modulator AC1 AC0 The ST25TB512-AT is specifically designed for short range applications that need re-usable products. The ST25TB512-AT includes an anticollision mechanism that allows it to detect and select tags present at the same time within range of the reader. The anticollision is based on a probabilistic scanning method using slot markers. Signal names AC1 AC0 Table 1. Signal names Description Antenna coil...