MAX3223: Looking for 2:1 RS232 Multiplexer!

Chethan,

If you want to mux RS232 signal, you need a mux that can support negative swing. It might be difficult finding such one in the market. You can take a look at CD4053B, whose main feature is digital to analog conversion though. If you use such a device, you need to provide positive and negative rails on board.

Another option is considering mux in digital domain. In that case, you have much more flexibility. You can refer to this post for similar discussion.

Regards,

Hao

Hello Hao, 

Thanks for your feedback. 

I am considering multiplexing in the TTL domain by converting  RS232 back to UART and then changing UART back to RS232. 

Attaching the block diagram and Schematic. Please have a look and let me know if it works. Thanks.

RS232 Multiplexing_Schematic.pdfRS232 Multiplexing_Blockdiagram.pdf