THVD4411: THVD4411 for Switch RS232 & RS485

Chen Alex1

Genius 3815 points

Part Number: THVD4411
Other Parts Discussed in Thread: THVD4431

Tool/software:

Hi Sir

Did the THVD4411 can achieve it?

Need switch between the RS232 and RS485

When RS232 module， Pin define is TX , RX , RTS , CTS
When RS485 module， original RS232 TX pin as the RS485的D+，RS232 CTS pin as the RS485 D-

0 Ethan Sempsrott 4 days ago

Hi Chen,

Thanks for posting this question.

THVD4411 cannot use the same RS-232 pins as the half-duplex RS-485 pins. Figure 7-2 and Figure 7-3 in the datasheet show this more clearly.

However, the solution to this problem is to use a MUX for these signals. We've had customers previously do this with the larger THVD4431:

If this interests you, I would reach out to the MUX team by creating a new question with a MUX device as the description.

Best,

Ethan

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