ISOW1432 Connection

Umut Öznar

Part Number: ISOW1432

Tool/software:

Hello,

I’m planning to use the ISOW1432DFMR transceiver and I have a few questions. I want to convert the TX and RX lines from my MCU to RS-485 using this transceiver. My supply voltage is 3.3V, and I’m also using the ISOW1432 to isolate this 3.3V supply.

I’ll be using the transceiver in a half-duplex configuration. In this case, do I need to connect the Y pin to the A line and the Z pin to the B line in order to achieve proper half-duplex operation?

Best Regards.

4 months ago

0 Clemens Ladisch 4 months ago

Guru 316960 points

Yes.

+1 Varun Kumar 4 months ago

TI__Expert 7585 points

Hello Urmut,

Thanks for your detailed inputs on the application.

Answering to your question:

Umut Öznar said:
I’ll be using the transceiver in a half-duplex configuration. In this case, do I need to connect the Y pin to the A line and the Z pin to the B line in order to achieve proper half-duplex operation?

Yes, that is the way to use the full duplex transceiver in half duplex mode. You can also refer this in our FAQ Page : [FAQ] ISO1452: [FAQ] How to configure a RS485 Full-duplex transceiver as Half-duplex? - Isolation forum - Isolation - TI E2E support forums

Regards
Varun