ISO1042: safety limit value meaning

Hi Emma,

Thanks for reaching out.

The safety limiting values specify the limits in which the isolation barrier is preserved, even under fault conditions. Exceeding these values can cause damage to the isolation barrier. For more information about safety limiting values, please refer to this E2E article: https://e2e.ti.com/blogs_/b/analogwire/posts/understand-and-apply-safety-limiting-values-for-digital-isolators 

In the datasheet, the safety limiting current values refer to the total current through any combination of pins (including the supply and I/O pins) that the device can withstand before damage to the isolation barrier occurs. Similarly, the safety limiting power values given by the datasheet refers to the maximum total power that the device can withstand before damage to the isolation barrier occurs.

Regards,

Kenneth