Power down circuit for low-power circuit with dual supply voltages
US4996453A · kind A · utility
20Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An integrated circuit which provides a low-power RS232 interface (or other serial interface). The integrated circuit receives separate power supply inputs for its own logic and for driving the serial line. Even if one of the power supply inputs fails, protection circuitry clamps floating nodes in the logic elements, and thereby avoids excessive current drain which might otherwise occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.