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SC16C554DB - 5 V 3.3 V and 2.5 V quad UART
FT4232HQ - Quad High Speed USB to Multipurpose UART/MPSSE
XR16V554D - 2.25V TO 3.6V QUAD UART
XR17V354 - HIGH PERFORMANCE QUAD PCI-EXPRESS UART
OXMPCI954 - Integrated High Performance Quad UARTs
XR16M564 - 1.62V TO 3.63V Quad UART
XR16M564D - 1.62V TO 3.63V Quad UART
XR16L784 - HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
OX16C954 - High Performance Quad UART with 128-byte FIFOs Intel / Motorola Bus Interface
ST16C554 - QUAD UART WITH 16-BYTE FIFOS
IN16C554 - TQ Enhanced Quadruple 16C550 UART
XR16M554 - 1.62V To 3.63V Quad UART
FT4232HL - Quad High Speed USB to Multipurpose UART/MPSSE
PI7C9X7954 - PCI Express Quad UART
TL16CP754CI - Quad UART
ST68C554 - 2.97V to 5.5V Quad UART
SC16C554 - Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder
XR16C854D - 2.97V TO 5.5V QUAD UART
ST16C654D - 2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO
ST16C654 - 2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO
