Electricity: electrical systems and devices – Safety and protection of systems and devices – Transient responsive
Patent
1997-10-14
1999-06-22
Elms, Richard T.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Transient responsive
326 81, 327328, H02H 322
Patent
active
059148446
ABSTRACT:
The invention relates to a mixed voltage bus system and in particular, interfaces between a number of integrated circuits and a bus where some of the integrated circuits operate at one logic level and others operate at a different logic level. An overvoltage tolerant interface for a semiconductor integrated device particulary useful in such a system may contain a pad, a pull-up transistor coupled to the pad, a voltage supply having an operating voltage, and an isolation switch operative to isolate the pull-up transistor from the voltage supply when a voltage at the pad exceeds the operating voltage of the voltage supply.
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Lutley James
Pant Sandeep
Cypress Semiconductor Corp.
Elms Richard T.
Huynh Kim
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