Memory device having error inform function

The invention is disclosed with respect to a memory device with an error notification. The memory device includes the ECC engine to perform ECC operations with respect to memory cells of the memory cell array to detect and correct an error bit, the error and outputting the error signal according to the ECC operation notification unit. ECC engine and outputs the ECC flag signal each time an error address corresponding to the error corrected by ECC error bit operation, and detect and correct an error bit. When compared to the error notification unit error address of the defective cell and the existing information, the comparison result does not match, and outputs an error signal. ECC operation number that is generated from the ECC flag signal error notification unit which counts the output an error signal if it exceeds the maximum ECC operations, and outputs the ECC operation for a number of error monitoring time.