Multi-channel semiconductor device and display device comprising same

摘要

A multi-channel semiconductor device comprises a plurality of buffer groups each comprising at least one output buffer, a plurality of pad groups each comprising at least one output pad, and a channel switching portion that controls connection between the plurality of buffer groups and the plurality of pad groups. One of the pad groups outputs an output signal of one of the buffer groups in a first operation mode and sequentially outputs output signals of all of the buffer groups in a second operation mode.

主权项

1. A multi-channel semiconductor device comprising:
a plurality of buffer groups each comprising at least one output buffer; a plurality of pad groups each comprising at least one output pad; and a channel switching portion that controls connection between the plurality of buffer groups and the plurality of pad groups, wherein one of the plurality of pad groups outputs an output signal of one of the buffer groups in a first operation mode and sequentially outputs output signals of all of the buffer groups in a second operation mode; wherein the channel switching portion comprises: a plurality of output switching portions that control connection between at least one output terminal of a corresponding buffer group and at least one output pad of a corresponding pad group; and a plurality of shift switching portions that control connection between at least one output pad of a corresponding pad group and at least one common node of a plurality of common nodes, wherein one of the shift switching portions, while turned on in the second operation mode, transmits signals from the common nodes to a plurality of output pads of a corresponding pad group, and each of the other shift switching portions among the plurality of shift switching portions, while turned on in the second operation mode, transmits a plurality of output signals of a corresponding buffer group to the plurality of common nodes, wherein, in the second operation mode, one of the plurality of output switching portions turns on at a different time from the other shift switching portions; wherein, in the second operation mode, the one output switching portion and the other shift switching portions are sequentially turned on during a predetermined time, and wherein the one output switching portion is in an ON state during at least a period in which the other shift switching portions are sequentially turned on.