Tri-state output circuit provided with means for protecting against abnormal voltage applied to output terminal
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United States of America Patent
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Jan 5, 1988
Issued Date -
N/A
app pub date -
Sep 25, 1986
filing date -
Apr 8, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An output circuit protected by an abnormal voltage supplied at an output terminal is disclosed. The output circuit comprises a first switching circuit includes first and second transistors connected in series for providing an output terminal with a first potential therethrough in response to a first logic state of a logic signal, a second switching circuit for providing the output terminal with a second potential in response to a second logic state of the logic signal, and means for making the first and second transistors non-conducting when the first switching circuit is disenabled.
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