| 摘要 |
Provided are first to fourth switch circuits of the same configuration as each other, each connected to complementary bus lines DB and *DB to be precharged to the same potential. In the-first switch circuit, switches 11 and 15 are connected between an input data signal line SI1 and the DB and between an input data signal line *SI1 and the *DB, respectively, and dummy switches 31 and 32 are connected between the SI1 and the *DB and between the *SI1 and the DB, respectively. Switches 11 to 18 are selectively on/off controlled by outputs of a decoder 20, whereas dummy switches 31 to 38 are normally off.
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