Microelectronics Co Ltd?FM17550 with ISO 14443A, ISO 14443B SPI, UART, I2C, HOST QFN-32-EP(5x5) RF Chips ROHS is a contactless near-field communication (NFC) module with dual-protocol support (ISO14443A/B) and integrated power management. It is manufactured by Fudan Microelectronics Co Ltd and has a compact 5x5mm QFN32 EP package, making it ideal for space-constrained applications. The module can be used as an RFID terminal or as an HF reader/writer in access control, e-payment, and contactless IC card authentication applications. It features an integrated MCU core with 256KB ROM and 64KB SRAM to address customer requirements. Other key features include built-in 13.56 MHz RF transceiver, high sensitivity receiver (-84 dBm), low power consumption (2.4 mA@3V), integrated 32KB SRAM, and I2C and UART digital interfaces. The RF Chips are fully RoHS compliant.