INTEGRATED CIRCUIT DEVICE

摘要

PURPOSE:To reduce the number of terminals by providing the titled circuit with terminals smaller than the number of signal lines and switching elements connecting plural signal lines to common terminals and to be connected/disconnected by control signals. CONSTITUTION:A multiplexer 4 is provided with switching elements 8a-8d sending signals from signal lines 3a-3d to lines 5a-5d. Switching elements 9e-9h are connected in order to send signals from signal lines 3e-3h to the signal lines 5a-5d. In addition, switching elements 10a-10d are connected to send signals from the signal lines 5a-5d to signal lines 3a-3d, and switching elements 11e-11h are connected to send signals from the signal lines 5a-5d to the signal lines 3e-3h.