DECODER CIRCUIT AND SEMICONDUCTOR DEVICE

摘要

PURPOSE:To obtain an inexpensive decoder circuit which has such a function that word lines or bit lines are made all selective or all non-selective in a test mode with simple circuit constitution without increasing a circuit scale of a whole decoder circuit, also is suitable for increasing integration. CONSTITUTION:This circuit is a decoder circuit 1 in a semiconductor memory. An output stage or a decoding stage of the decoder circuit 1 is connected to a first power supply 4 which supplies a high potential voltage and a second power supply 5 which can supply either of a reference potential voltage and a high potential voltage by a control signal.