Patent ID: 7508232
Filing Date: 2009-03-24
Classification: H03K,H04L

Abstract:
1. A data output driver comprising: a data multiplexer which provides a pull-up/pull-down data signal; an on-die termination calibration circuit which provides an N bit (N is a natural number) pull-up/pull-down resistance-adjusting code signal; and an output circuit coupled to the data multiplexer and the on-die termination circuit and which includes a plurality of pull-up/pull-down pre-drivers and a plurality of pull-up/pull-down drivers and outputs a data signal when the pull-up/pull-down drivers are driven in response to an M bit (M being a natural number) pull-up/pull-down control signal selected in response to an enable signal and obtained by a logic-combination of the pull-up/pull-down resistance-adjusting code signal and the pull-up/pull-down data signal.