Semiconductor integrated circuit device capable of reducing powe

Details Semiconductor integrated circuit device capable of reducing powe Semiconductor integrated circuit device capable of reducing powe

1997-01-21

1998-03-24

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 80, 327143, H03K 1730

Patent

active

057317208

ABSTRACT:
A semiconductor integrated circuit device is intended to prevent generation of an unnecessary leak current and hence to reduce power consumption. In the semiconductor integrated circuit device comprising: a current path which is formed between a predetermined power source terminal (or a predetermined power source pad) and a predetermined low potential power source line, a comparison circuit for comparing a node potential in the current path with a predetermined threshold voltage to thereby detect whether the voltage applied to said power source terminal is a voltage which is larger than an upper limit value of the terminal voltage, a signal generation circuit for generating a predetermined logic signal when the states of some designated control terminals satisfy a combination which is determined in advance, if the logic state of an output signal of said signal generation circuit is a predetermined logic state when said comparison circuit has detected that the voltage applied to the power source terminal is a voltage which is larger than an upper limit value of the terminal voltage, a circuit equipped with a predetermined function mounted on the chip is activated, the semiconductor integrated circuit device being characterized by comprising ON/OFF circuit for turning on and off said current path in accordance with the logic state of the output signal of said signal generation circuit.

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