Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU).

Abstract: A data output buffer of a semiconductor memory device using a clock having a fixed period from outside. The data output buffer has a data input part controlled and synchronized with a clock, for inputting data; a data latch device for latching data output through the data input part to thereby set up a predetermined delay time; a control signal input part controlled by the clock, for inputting a control signal; a latch controller for latching the control signal output through the control signal input part during a given time; a data output driver for receiving an output signal from the data latch device, the data output driver being controlled by the output signal of the latch controller; and an output device connected to the data output driver, for providing the data.