SEMICONDUCTOR MEMORY DEVICE COMPRISING DELAY LOCKED LOOP AND METHOD FOR OUTPUTTING DATA IN SEMICONDUCTOR MEMORY DEVICE

摘要

PURPOSE: A semiconductor memory device comprising a delay locked loop(DLL) and a method for outputting data in the semiconductor memory device are provided to generate a latency signal and an enable signal by considering delays which the latency signal receives. CONSTITUTION: According to the semiconductor memory device, a delay locked loop(DLL)(410) receives an external clock and generates an internal clock synchronized to the above external clock. A buffer(420) receives the above internal clock and outputs a data clock by delaying the internal clock by the first time. An enable signal generation part(430) receives the internal clock and generates an enable signal by delaying the internal clock by the second time in response to a data read command. And a data output buffer(440) outputs data corresponding to the data read command in response to the enable signal and a data clock. The second time is shorter than the first time.