| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device having different types of power supply mixedly in which power supply/ground power supply lines can be enhanced, degree of freedom can be increased in the design of terminal arrangement, and noise due to simultaneous variation of outputs can be reduced. SOLUTION: A logic functioning through the same power supply is constituted as a multichip IC device for each IC device and the IC devices are stacked and packaged thus facilitating design of layout for enhancing the power supply/ ground power supply lines individually. Design of terminal arrangement can also be facilitated while taking account of noise being generated when a bi- directional terminal and an output terminal are varied simultaneously with regard to terminal arrangement. Consequently, reliability as an IC device is enhanced and increase of development period is suppressed. |
