SC16C550B - 5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs QFN 32-Pin
IC UART SINGLE W/FIFO 32-HVQFN
UART 4-CH 16Byte FIFO 2.5V/3.3V/5V 48-Pin HVQFN EP T/R
