SC16C554B/554DB - 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs QFP 80-Pin
4-Channel UART Interface IC, 5Mbps, LQFP, 5V
4-Channel 5Mbps LQFP Surface Mount Interface IC
