Nonvolatile semiconductor memory

摘要

A nonvolatile semiconductor memory according to the present invention includes a plurality of floating gate type memory cells arranged in rows and columns, a plurality of word lines, each word line being connected to the memory cells arranged in a given one of the rows, and a plurality of bit lines arranged in parallel to one another. Each bit line is connected to the memory cells arranged in a given one of the columns and the bit lines are divided into first bit lines and second bit lines which are arranged to alternate with one another. A page buffer is also included which has a first page buffer portion connected to the first bit lines extending in a first column direction and a second page buffer portion connected to the second bit lines extending in a second column direction, the first column direction being opposite to the second column direction. This construction allows for high integration density and reduced data loading cycle time.