Patent ID: 9142319
Filing Date: 2015-09-22
Classification: G11C

Abstract:
1. A semiconductor device comprising: a fuse unit connected to a detection node and configured to be programmed in response to a first voltage supplied through the detection node; an output unit connected to the detection node and configured to output a fuse information signal indicating whether or not the fuse unit is programmed; a decoder configured to supply an enable signal of a blocking unit; and the blocking unit configured to block the first voltage supplied through the detection node in response to the fuse information signal of a low logic level regardless of the enable signal after the fuse unit is programmed, wherein the fuse information signal is initiated to a high level and the enable signal has a low level, so that first voltage is not applied to the detection node before the fuse unit is programmed, wherein the enable signal transits to a high level in a state that the fuse information signal maintains the high level, so that the first voltage is applied to the detection node thereby the fuse unit is programmed, wherein the fuse information signal maintains the low logic level by applying the first voltage to the detection node, so that the first voltage is not applied to the detection node even though the enable signal has a high level after the fuse unit is programmed.