Patent ID: 7622982
Filing Date: 2009-11-24
Classification: G11C

Abstract:
1. An electrical fuse device comprising: a plurality of fuse cores, each having an electrical fuse element and a switching element serially connected to the electrical fuse element; a program control circuit for generating a program shift signal by sequentially shifting a program control transmission signal in synchronization with an effective program clock signal and subsequently generating a program signal to be provided to each of the switching elements in the plurality of fuse cores based on program data and the program shift signal; a program clock control circuit for controlling the conducting and non-conducting states of a program clock signal in accordance with a program clock enable signal and, when the program clock signal is in a conducting state, transmitting the program clock signal to the program control circuit as the effective program clock signal; and a counter circuit, disposed in a stage before the program clock control circuit, for counting the number of input pulses of a program mode switching pattern signal, asserting and outputting the program clock enable signal to the program clock control circuit, when the number of the input pulses counted reaches a preset value.