A hub has a case with an up-stream Type A USB socket in a top surface and four down-stream Type A sockets in the side surfaces. The output module has a first and a second transistor which are connected to a current source at a first connection and to input terminals by a control connection. The second storage units are for being written into with a plurality of second codes. Wherein, the integrated circuit comprises the integrated circuit components and the metal structure that has a bonding pad. The regularly occurring write backs operate independently of Least Recently Used status of the entries so that all entries are flushed. The valve includes a valve housing having a housing sleeve and an electromagnetic actuator for an armature which is guided in an axially displaceable manner and which cooperates with a valve seat situated on a seating plate so that a fluid flow through outflow orifices in the seating plate is controllable.