8.4.9 Interrupt Operation

The INT pin is an open drain active low output pin that needs to be pulled up to V_DDI with an external pull-up resistor. The pull-up resistor shall be sized such that the rise time of the INT pin is < 100 µs. This is important since slower rise time could cause POR Interrupt to not be detected by the processor during TCA5013 startup. Generally speaking faster rise times on the INT line will reduce the chances of missing interrupts. There various interrupt events in the TCA5013 that can cause the INT pin to be asserted low. These interrupt events are described in the below sections.