| 摘要 |
An input data latch circuit and method are provided to reduce the area of a semiconductor memory device and to reduce unnecessary current consumption, by making the circuit configurations of latches for directly latching an input signal equal and the circuit configurations of the other latches different from that of the latches for direct-latching. A buffer outputs an input signal by buffering input data according to a write command. A first latch(200) latches the input signal by aligning to a first data strobe signal and outputs first rising data. A second latch latches the input signal by aligning to a second data strobe signal and outputs first falling data. A third latch latches the first rising data by aligning to the second data strobe signal and outputs second rising data. The first latch and the second latch latching the input signal have the same circuit configuration, and the third latch has a different circuit configuration from the first and second latches.
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