DATA STROBE INPUT BUFFER, SEMICONDUCTOR MEMORY DEVICE, DATA INPUT BUFFER, AND METHOD FOR CONTROLLING PROPAGATION DELAY TIME OF SEMICONDUCTOR MEMORY

摘要

PPROBLEM TO BE SOLVED: To provide a multi-mode data buffer controlling a propagation delay time and its control method. PSOLUTION: In a data buffer such as a data strobe input buffer or a data input buffer which can be operated with a multi-mode as SM (single mode) and DM (dual mode), the mode is selected by providing an external signal such as, for example, an address signal or an external command signal, the data buffer is used as SM/DM dual use, can improve data setup/hold-margin, a semiconductor memory device comprises the data buffer of one or more, also, a method of for controlling a propagation delay time can improve data setup/hold-margin of the SM/DM dual use data buffer. PCOPYRIGHT: (C)2004,JPO