| 摘要 |
A semiconductor memory device for providing data together with an echo clock as an indicating signal representing a time for providing or presenting data in an electronic system is described. The device comprises an echo data latch circuit for generating a source signal of the echo clock in response to an output of a sense amplifier for sensing and amplifying the data of a memory cell during a read operation, and for producing the source signal of the echo clock in response to a predetermined level of power voltage during a write operation; and an output circuit, connected between the echo data latch circuit and an echo clock output terminal, for receiving the source signal of the echo clock and for outputting the echo clock to the output terminal in response to control data relating to an external clock, thereby minimizing or reducing clock skew and also preventing speed push.
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