SEMICONDUCTOR MEMORY DEVICE, METHOD OF OPERATING THE SAME AND MEMORY SYSTEM INCLUDING THE SAME

摘要

A semiconductor memory device according to an embodiment of the present invention includes a memory block, a driving circuit performing a program operation on memory cells and a voltage detector generating a detection signal when an external power supply voltage is reduced to less than a reference voltage level. The driving circuit discharges a voltage applied to a drain selection line during the program operation in response to the detection signal.

主权项

1. A semiconductor memory device operating by receiving an external power voltage, the semiconductor memory device comprising:
a memory block coupled to a drain selection line, a source selection line and a plurality of word lines arranged between the drain selection line and the source selection line; a driving circuit suitable for performing a program operation on memory cells coupled to a selected word line, among the plurality of word lines; and a voltage detector suitable for monitoring the external power supply voltage and generating a detection signal when the external power supply voltage is reduced to less than a reference voltage level, wherein the driving circuit discharges a voltage applied to the drain selection line during the program operation in response to the detection signal.