SEMICONDUCTOR MEMORY DEVICE REDUCING SELF REFRESH CURRENT, ESPECIALLY INCLUDING A PLURALITY OF FUSE OPTION UNITS TO SELECT A PLURALITY OF BANKS

摘要

PURPOSE: A semiconductor memory device reducing a self refresh current is provided to reduce current consumption in a self refresh mode. CONSTITUTION: According to the semiconductor memory device, a fuse enable circuit(30) generates a fuse enable signal. A number of fuse option units(32) determines one of a top block(22) and a bottom block(24) per each bank. A number of uppermost row address selection units(34) output a fuse option uppermost row address being output from the fuse option unit or a normal uppermost row address from the outside of a chip selectively in response to the fuse enable signal.