SN65LVCP22: Using SN65LVCP22 as UART MUX 2 to 1

Moral Assraf

Part Number: SN65LVCP22
Other Parts Discussed in Thread: TS5A23157, TMUX582F-SEP, SN54HC157-SP, SN54HC138-SP, SN54HC08-SP, SN54HC32-SP

Tool/software:

Hello Team,

Is it possible to use SN65LVCP22 as UART (TX and RX only) MUX 2 to 1?

Thanks,
Moral.

5 months ago

0 Clemens Ladisch 5 months ago

Guru 279220 points

No. This device has buffered I/Os, so all signals must be LVDS.

It would be easier and cheaper to use an actual mux like the TS5A23157.

0 Moral Assraf 5 months ago in reply to Clemens Ladisch

Prodigy 155 points

May you recommend an actual mux like the TS5A23157 or other similar part with SEP version?

+1 Clemens Ladisch 5 months ago in reply to Moral Assraf

Guru 279220 points

The only space-rated mux is the TMUX582F-SEP, which is probably not helpful.

For UART signals, you could use a buffered multiplexer like the SN54HC157-SP, and a demultiplexer like the SN54HC138-SP. Alternatively, build the logic yourself with OR/AND gates like the SN54HC32-SP/SN54HC08-SP.

0 Moral Assraf 5 months ago in reply to Clemens Ladisch

Prodigy 155 points

Thank you!!

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SN65LVCP22: Using SN65LVCP22 as UART MUX 2 to 1