The ST25R3910-BQFT is a contactless reader IC from STMicroelectronics. It has been designed to be used in contactless and dual interface products such as NFC (Near Field Communication), contactless debit/credit cards, contactless e-payment tokens, and loyalty cards. The chip contains a host of features such as an integrated RF front end, RF harvesting, a self-calibrating low frequency wake-up receiver, a high speed 18-pin digital core, a built-in self test circuit, and an internal voltage regulator. It supports several standards for NFC, framing protocols, and other communication protocols such as ISO 14443 and FeliCa, making it an ideal solution for a wide variety of applications.