The BC45B4523 is a single-chip reader ASIC for 13.56MHz NFC/contactless standard protocols, which provides the best solution for near field wireless communication applications such as access control locks, label readers, payment machines. The device supports and compatibles with all major global secured baseband ISO standards including ISO14443 Type A, Type B, Crypto_M cards and Smart label ISO15693. The device provides a highspeed SPI controller/host interface with an integrated 64-byte FIFO for smooth data transfer. Furthermore, the embedded codec is capable of handling all bitlevel coding/decoding, encrypting/decrypting as well as frame-level manipulation for transmission and reception. The device is well suited for mobile devices due to its low power consumption and low operating oltage from 2.7V to 3.6V. The ultra-low power onchip 3.3V regulator is provided to stabilize the device power, and simultaneously supply power of up to 150mA to the external companion microcontroller.