Semiconductor memory device with ability to effectively adjust operation time for on die termination

The present invention is to provide a semiconductor memory device that can be easily adjusted than the ODT operation, the present invention to accomplish this is to delay for a predetermined latency the ODT operation signal input from the outside latency control for generating the ODT drive enable signal portion .; Control signal generator for generating a control signal for controlling a shape change of the waveform driving the ODT enable signal has; Trimming control unit for outputting the response to the control signal changing the driving waveform of the ODT enable signal; And it provides a semiconductor memory device having a termination circuit to connect the termination resistor and the impedance control node in response to the driving ODT enable signal output from the trim control unit. A semiconductor memory, ODT, termination, and resistance.