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About Uart serial communication multiplexing

Other Parts Discussed in Thread: TS3A5223

Hello Dears.

My mcu has single uart com. port,but i want communicate two devices by one uart devices,example rs485, Telit gsm modem etc. How can i do this ? when i searching multiplexer I saw TS3A5223 chip, is it right chip for UART MULTIPLEXING ? MCU voltage 3.3V imx233 Freescale Thanks !!