Patent ID: 7224053

Claim:
A semiconductor device which integrates a plurality of semiconductor chips into a single package, comprising: a first semiconductor chip which includes a plurality of first bonding pads outputting first signals having a first level; and a second semiconductor chip which includes a plurality of second bonding pads electrically coupled to a part of the plurality of first bonding pads to receive the first signals having the first level from the first semiconductor chip through the part of the plurality of first bonding pads, a plurality of third bonding pads, and a signal level conversion circuit configured to convert the first signals of the first level into second signals having a second level different from the first level and outputs the second signals through the plurality of third bonding pads, and wherein said first level and said second level correspond to respective, different driving voltages in a digital circuit, and wherein the second semiconductor chip includes one or more digital circuits configured to receive and operate with signals of the first level as well as signals of a second level corresponding to a second driving voltage.