Patent ID: 7791960

Claim:
A semiconductor memory device, comprising: a voltage range detector configured to generate at least one voltage detecting signal corresponding to a range of a level of an external power voltage applied from an external portion; and a control signal generator configured to generate a set control signal responsive to a code signal and a command signal, and output a control signal responsive to the at least one voltage detecting signal and the set control signal receive the at least one voltage detecting signal from the voltage range detector and to generate a control signal corresponding to at least one range of a voltage level of the external power voltage, wherein the control signal generator comprises a control signal setting portion configured to generate a set control signal responsive to a code signal and a command signal, and a final control signal generating portion configured to output the control signal responsive to the at least one voltage detecting signal and the set control signal, and wherein the semiconductor memory device performs an operation for satisfying a characteristic according to a specification of the semiconductor memory device in response to the control signal.