The MAX7322 2-wire serial-interfaced peripheral features four push-pull outputs and four input ports with selectable internal pullups. Input ports are overvoltage protected to +6V and feature transition detection with interrupt output. The four input ports are continuously monitored for state changes (transition detection). The interrupt is latched, allowing detection of transient changes. Any combination of inputs can be selected using the interrupt mask to assert the open-drain INT output. When the MAX7322 is subsequently accessed through the serial interface, any pending interrupt is cleared.