ISOW1412: Input & Output Design Issue

Francis Jiang

Intellectual 1800 points

Part Number: ISOW1412
Other Parts Discussed in Thread: THVD1500

Tool/software:

Hi Team,

Why the recommend design of ISOW1412 is different from THVD1500? Thanks in advance.

ISOW1412: connect inverting output with non-inverting output, inverting input with non-inverting input

THVD1500: connect inverting output with inverting input, non-inverting output with non-inverting input

BRs,

Francis

4 months ago

+1 Clemens Ladisch 4 months ago

Guru 275760 points

The ISOW14x2 is full duplex. The THVD1500 is half duplex. You can use ISOW14x2 in a half-duplex system by connecting the inputs and outputs together (see the internal schematic of the THVD1500 above).

As for the A/B confusion, this is just an error; nobody expected you to count the twists.

+1 Andrew Jackiw 4 months ago in reply to Clemens Ladisch

TI__Mastermind 20205 points

Hello Francis,

Clemens is correct. The difference shown is because ISOW14x2 is full duplex while the THVD1500 is half duplex. You can configure the ISOW14x2 as a half-duplex device if that is needed. (+) [FAQ] ISO1452: [FAQ] How to configure a RS485 Full-duplex transceiver as Half-duplex?

Best,
Andrew

0 Francis Jiang 4 months ago in reply to Clemens Ladisch

TI__Intellectual 1800 points

Thanks all of you guys!

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ISOW1412: Input & Output Design Issue