Power down circuit for low-power circuit with dual supply voltag

Details Power down circuit for low-power circuit with dual supply voltag Power down circuit for low-power circuit with dual supply voltag

1989-07-28

1991-02-26

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307451, 3072964, 375 36, H03K 19092

Patent

active

049964534

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.

REFERENCES:
patent: 4607170 (1986-08-01), Wickman
patent: 4791323 (1988-12-01), Austin
patent: 4916337 (1990-04-01), Leung et al.

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