ST25TB512-AT6G6 STMicroelectronics

ST25TB512-AT Datasheet 13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions Features ISO 14443-2 Type B air interface compliant ISO 14443-3 Type B frame format compliant 13.56 MHz carrier frequency 847 kHz subcarrier frequency 106 Kbit/second data transfer -Unsawn wafer -Bumped and sawn wafer 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 pF 1 million erase/write cycles 40-year data retention Self-timed programming cycle 5 ms typical programming time Application Transport Product status link ST25TB512-AT DS11456 - Rev 7 - September 2018 www.st.com For further information contact your local STMicroelectronics sales office.ST25TB512-AT Description 1 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 16 blocks of 32 bits. The ST25TB512-AT is accessed via the 13.56 MHz carrier. Incoming 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 kHz 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 recommendation for the radio-frequency power and signal interface. Figure 1. Logic diagram ST25TB512-AT AC1 Power Supply Regulator ASK 512-bit Demodulator User EEPROM BPSK Load Modulator 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. Table 1. Signal names Signal names Description AC1 Antenna coil AC0 Antenna coil The ST25TB512-AT contact-less EEPROM can be randomly read and written in block mode (each block containing 32 bits). The instruction set includes the following nine commands: Read block Write block Initiate Pcall16 Slot marker Select Completion Reset to inventory Get UID DS11456 - Rev 7 page 2/45