Semiconductor integrated circuit with voltage-detecting...

Details Semiconductor integrated circuit with voltage-detecting... Semiconductor integrated circuit with voltage-detecting...

2005-09-13

2005-09-13

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C710S100000

Reexamination Certificate

active

06944003

ABSTRACT:
A first semiconductor integrated circuit is connected to a second semiconductor integrated circuit with a cable. In the first semiconductor integrated circuit, when a power supply voltage becomes less than a set voltage detection level, a voltage-detecting circuit outputs a voltage-detected signal to lower the voltage of the cable and to stop the operation. The second semiconductor integrated circuit detects the decrease in the voltage of the cable to recognize the halt of the operation of the first semiconductor integrated circuit. In the first semiconductor integrated circuit thus configured, in testing the operation under low-voltage conditions in which the power supply voltage is less than the set voltage detection level, the voltage-detecting circuit receives a control signal from an external terminal to stop the operation forcibly. Consequently, even when the power supply voltage is made lower than the set voltage-detecting level, the first semiconductor integrated circuit properly operates until the power supply voltage reaches a predetermined lower limit of operating voltage. Thus, evaluation of operation is possible under low-voltage conditions.

REFERENCES:
patent: 5559966 (1996-09-01), Cho et al.
patent: 5852743 (1998-12-01), Yeh
patent: 6378026 (2002-04-01), Chan et al.
patent: 03143064 (1991-06-01), None
patent: 07221819 (1995-08-01), None
patent: 11-27432 (1999-01-01), None

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