Semiconductor memory device

Abstract

A semiconductor memory device includes: a bank including a plurality of cell blocks; a first group of local input / output lines to transfer data stored on a first group of the cell blocks according to a first data output mode; a second group of local input / output lines to transfer data stored on a second group of the cell blocks according to the first data output mode and a second data output mode; a first precharge unit precharging the first group of the local input / output lines; a second precharge unit precharging the second group of the local input / output lines; a precharge signal generator to precharge the first and second groups of the cell blocks for the first data output mode and the second group of the cell blocks for the second data output mode.

Description

technical field [0001] The present invention relates to a semiconductor memory device, and more particularly, to a precharge circuit for local input / output lines in the semiconductor memory device. Background technique [0002] Typically, a semiconductor memory device having a stacked memory bank structure includes a plurality of memory banks, each of which is configured with a set of memory cell arrays each including a plurality of memory cells. The memory blocks are arranged in the word line direction, and the memory cell arrays are also arranged in the word line direction, and are connected to local input / output lines. The local input / output lines are used as data transmission lines by connecting to the global input / output lines. The number of local input / output lines is prepared as many as the divided memory blocks, and a precharge circuit is connected to precharge each local input / output line. [0003] FIG. 1 illustrates a block diagram for describing a part of a memo...

AI Technical Summary

Problems solved by technology

As a result, when the 4-bit or 8-bit data output operation mode is performed, the upper and lower partial input / output lines 101 and 102 connected to the 16-cell block are all unnecessarily precharged, thereby causing current consumption

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