PURPOSE: An interface device and a system including the same are provided to reduce latency and overhead of an interface device in the connection of a master device and a slave device. CONSTITUTION: A TMU(Transaction Management Unit)(210) partitions transaction into head sub-transactions from at least one master device. A buffer unit(230) stores one or more sub-transaction. A selecting circuit(240) selects the head sub-transaction and output of the buffer unit in response to a selection control signal.
