The ST16C654DIQ64-F is a 1.5 Mbps 5.5 V SMT Quad UART with a 64-byte FIFO from the ST16C654 Series of serial communication integrated circuits manufactured by MaxLinear. It is packaged in a PLCC-68 package and it is an ideal choice for applications requiring four independent UARTs such as computer-to-computer or computer-to-printer communication. The ST16C654DIQ64-F supports full-duplex asynchronous communication, as well as parallel and serial peripheral interface (SPI) modes, data rates up to 1.5 Mbps, five to eight bits per character, and one or two stop bits. It also has improved buffer isolation that prevents simultaneous transmission and reception of different data modes, and its 64-byte FIFO improves bus efficiency, reducing system interference. This part also features a wake-up logic control as well as sleep mode if all four UARTs are idle. The ST16C654DIQ64-F is a general purpose UART device designed to perform asynchronous communication with high transfer rates and compatibility with TTL and CMOS voltage levels. With its high-speed operation, improved buffer isolation, 64-byte FIFO and versatile bug-free operation, this part is suitable for many applications.