ISO1541: Using the ISO1541 as a general purpose bi-directional isolator

Mark Labbato

Part Number: ISO1541

Hello there,

I am designing a board and need to isolate a bi-directional signal, specifically the TMS signal when running in cJTAG mode with an emulator. Other than being limited to 1MHz JTAG operation, are there any other important things to worry about here?

Thanks,
Mark

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 245740 points

I²C uses open-drain signals. The ISO154x devices require the fact that the high voltage level is not actively driven to implement the bidirectional I/Os.

I guess your TMS signal is open-drain?

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ISO1541: Using the ISO1541 as a general purpose bi-directional isolator