SEMICONDUCTOR MEMORY DEVICE HAVING 2 BANK SHARED INPUT/OUTPUT STRUCTURE

摘要

PURPOSE: A semiconductor memory device having 2 bank shared input/output structure is provided, which has an increased sensing speed at a high frequency by reducing a loading of an input/output line, and makes it easy to design a sense amplifier by reducing a length of the input/output line. CONSTITUTION: The semiconductor memory device comprises the first and the second memory bank where a plurality of memory cells are arranged, and the first multiplexer connecting a common input/output line and the first input/output line inputting/outputting data to/from the selected memory cells of the first memory bank. And the second multiplexer connects the common input/output line with the second input/output line inputting/outputting data to/from the selected memory cells of the second memory bank. And an input/output sense amplifier(107) senses and amplifies data being inputted/output through the common input/output line. The first and the second memory bank are activated selectively.