A databus includes n+1 (n>/=2) lines which form n true-only lines and lead from n input blocks to n output blocks. One of the true-only lines as well as a monitoring line are associated with one of the input blocks which is located at a start of the databus and has the longest signal delay time. A NAND gate is connected downstream of the input block at the start of the databus and has an output connected to each output block.
