SC16C2550B - 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs QFN 32-Pin
Dual UART Interface IC, 5Mbps, 2 Channels, 5V, Surface Mount
SC16C550B - 5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs QFN 32-Pin