Electronic digital logic circuitry – Interface – Supply voltage level shifting
Reexamination Certificate
2005-03-08
2005-03-08
Le, Don (Department: 2819)
Electronic digital logic circuitry
Interface
Supply voltage level shifting
C326S083000
Reexamination Certificate
active
06864719
ABSTRACT:
A semiconductor device comprises a high-voltage detector for generating a test mode signal and a detection signal when a test mode setting signal is inputted from an input terminal for inputting, as a first input signal, any one of a normal signal and the test mode setting signal having a higher voltage than the normal signal, an input circuit for generating a normal mode signal in accordance with the normal signal, and a protection circuit for reducing an electric field between an input side and a low-voltage power supply side of the input circuit in accordance with the detection signal, the electric field being generated by inputting the test mode setting signal thereto.
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