The ST25R3911B-AQFT is a RFID Transponders NFC/HF RFID Reader IC manufactured by STMicroelectronics. It is a highly integrated single-chip that supports various short range radio communication technologies, including NFC, HF, and UHF. It supports data transfer rates up to 848 Kbps and is highly power efficient for efficient battery operation. The integrated EEPROM offers storage for up to 64 Kbs of data, while a flexible power management system enables the device to optimise power consumption in battery-operated devices. It is suitable for applications such as secure access control, item level tracking, and contactless payment systems. It is also compliant with global standards such as ISO 15693, ISO 18092, ISO 14443 A/B. The ST25R3911B-AQFT is also engineered for easy integration, offering UART, SPI, I2C, and USB interfaces.