| 摘要 |
PURPOSE:To enable to easily convert the source voltage in a C MOS IC and thus contrive the realization of a system directive to a low power consumption, by changing the mask of wiring members. CONSTITUTION:The group of contact pairs 2-1-2-n is purposed to connect the pad for the power source 1 to supply the source voltage from the outside of the IC to a specific constant-voltage regulated power supply circuit 3-i, and the group of contact pairs 4-1-4-n is purposed to connect the specific constant-voltage regulated power supply circuit 3-i to the power source line 6 of an internal functional block 5. To fit the using purpose of the C MOS IC, the group of contact pairs are kept as follows, that is only a pair of contact pairs 2-i and 4-i before and behind the used constant voltage circuit 3-i in a state of conduction and the other contact pairs all in a state of non-conduction. When the source voltage used in common to the system is supplied from the pad for the power source 1, it is converted into the source voltage fitted to the using purpose by mediating contact pair 2-i, constant-voltage regulated supply circuit 3-i and contact pair 4-i and supplied into the power source line 6 to the internal functional block 5. |
