SEMICONDUCTOR MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To suppress the skew between data bits, and minimize speed loss by equipping this device with the first data line which connects the i/o means in the same positions in a memory cell array block, and the second data line which connects the first data lines in the same positions in the memory cell array. SOLUTION: An i/o switch and an i/o driver 8 are constituted, and they are connected to the data i/o line 7 of each block 200. In a block 200 which shares the same data i/o buffer and the same pad 10, several i/o switches and several i/o drivers 8 in the same positions are connected with one another by the first data line 11 and the second data line 6, respectively. The second data line 6 is connected to the data i/o buffer and the pad 10 through a sense amplifier 9. Hereby, the data path from the data i/o line 7 is shortened to the utmost, and also the speed difference between several data lines 11 and 6 is minimized.