The ST68C554DCQ64-F is a Quad UART ( Universal Asynchronous Receiver/Transmitter) integrated circuit from the ST68C554 series, manufactured by MaxLinear. This device offers four independently programmable UART channels on a single chip, each with its own 16-byte FIFO (First-In-First Out) buffer. The device features a maximum data rate of 1.5Mb/s when operating at 5.5V, and features a TQFP-64 (Thin Quad Flat Pack) package. This device is ideal for applications requiring multiple serial data streams including system monitoring, industrial control, audio and video equipment, and modem and networking equipment.