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ISO6521: ISO6521 maximum input current

Alecsandru Neacsu
Prodigy 210 points

Part Number: ISO6521

ISO6521 datasheet shows (chapter 7.4.1) that there are inner diodes on each input (also specified in absolute maximum ratings, the "+/-0.5V"). In my application there may be occasional (=surge/exception) situations where input voltage can go beyond local supply. I intend to add series resistors with inputs for such situations. To properly size these resistors, I need to know the absolute maximum value for the input current, when the inner diodes are conducting.

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    TI__Prodigy 630 points

    Hello,

    We do not provide an absolute maximum input current value that you are requesting. According to our datasheet you can expect about 1.8 mA of input current at 1 MBPS and 3.3 V supply. You can use this as a rough baseline when sizing your resistor. The best solution would be to test your input with our EVM.