| 摘要 |
An address input buffer of a semiconductor memory device uses a multiplexer, converts at least two address input signals to an internal address signal corresdponding to a seleted mode, through the selected mode by a control signal of the multiplexer, and outputs the internal address signal. The address input buffer includes: an address buffer for inputting at least two address input signals(A1,A2); at least two output terminals for outputting address signals(AI_1,AI_2) from the address buffer; a multiplexer which is connected between the address buffer and the output terminals, and switches at least two output terminals receiving the address signals(AI_1,AI_2) from the address buffer signals; and a multiplexer controller for controlling a switching operation of the multiplexer.
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