Semiconductor integrated circuit device
First Claim
1. A semiconductor integrated circuit device comprising:
- an internal circuit formed on a semiconductor substrate;
an signal terminal for supplying an input/output signal of said internal circuit;
a power source supply terminal for supplying a power source for said internal circuit;
a common wiring;
a first protection element provided between said signal terminal and said common wiring for providing prevention of electrostatic break down;
a second protection element provided between said power supply terminal and said common wiring for providing prevention of electrostatic break down; and
a resistor element to be inserted in one of between the signal terminal and the first protection element and between said power supply terminal and said second protection element.
7 Assignments
0 Petitions
Accused Products
Abstract
When an element of an internal circuit is arranged in the vicinity of an input/output terminal of an LSI chip, electrostatic break down is caused in an internal circuit element by discharge current generated between an input/output terminal and a grounding terminal or a power source terminal. Therefore, the elements are arranged with a distance to cause dead space therebetween to make down-sizing of the LSI chip difficult. Therefore, a resistor is disposed between an input/output terminal and a protection element connected thereto. The resistor causes increasing of resistance of a current path from the input/output terminal to the grounding terminal, at the common wiring. Thus influence of the electrostatic break down for the element of the internal circuit can be restricted to permit location of the resistor to permit the internal circuit element to be arranged in the vicinity of the protection element of the input/output terminal. Thus, a problem of the dead space can be solved and down-sizing of the LSI is enabled.
19 Citations
10 Claims
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1. A semiconductor integrated circuit device comprising:
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an internal circuit formed on a semiconductor substrate; an signal terminal for supplying an input/output signal of said internal circuit; a power source supply terminal for supplying a power source for said internal circuit; a common wiring; a first protection element provided between said signal terminal and said common wiring for providing prevention of electrostatic break down; a second protection element provided between said power supply terminal and said common wiring for providing prevention of electrostatic break down; and a resistor element to be inserted in one of between the signal terminal and the first protection element and between said power supply terminal and said second protection element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A semiconductor integrated circuit device comprising:
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an internal circuit formed on a semiconductor substrate; an signal terminal for supplying an input/output signal of said internal circuit; first and second power source supply terminals for supply power source for said internal circuit; a common wiring; a first protection element provided between said signal terminal and said common wiring for providing prevention of electrostatic break down; a second protection element provided between said first power supply terminal and said common wiring for providing prevention of electrostatic break down; a third protection element provided between said second power source supply terminal and said common wiring for providing prevention of electrostatic break down; and a resistor element inserted between the signal terminal and the first protection element. - View Dependent Claims (10)
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Specification