An integrated network chip and an electronic device using the chip are illustrated. The integrated network chip includes at least a first access interface, at least a second access interface, a power management unit (PMU) and an interface bridge. The first access interface and second access interface respectively provides the electronic device with a local area network connection function and a memory card access function. The interface bridge integrates the first access interface and second access interface by providing a hub-like functionality. The PMU provides the power and the ground to the first access interface, second access interface and the interface bridge. When the PMU detects the second access interface enters a power saving mode, the PMU provides a lower operation voltage to the second access interface.