PCMCIA power multiplexer integrated circuit with programmable de

Details PCMCIA power multiplexer integrated circuit with programmable de PCMCIA power multiplexer integrated circuit with programmable de

1994-09-27

1997-07-22

Popek, Joseph A.

Static information storage and retrieval

Powering

36518909, 365212, G11C 1300

Patent

active

056509731

ABSTRACT:
A digital value on a plurality of control input terminals of a PCMCIA power multiplexer integrated circuit determines which one if any of a plurality of power input terminals (for example, 12 volts, 5 volts, and 3 volts) is coupled through the integrated circuit to a power output terminal. A decoder which decodes the digital value prevents any two of the power input terminals from being coupled to the power output terminal at the same time. The decoder is programmable so that a single power multiplexer integrated circuit die layout can support a variety of PCMCIA controllers outputting different digital values. The integrated circuit has current limit, controlled power turn on times, and overtemperature protection. A signal indicative of a fault condition (for example, an overtemperature or a current limit condition) is output onto a fault output terminal of the integrated circuit.

REFERENCES:
patent: 4669066 (1987-05-01), Kagawa et al.
patent: 4754160 (1988-06-01), Ely
patent: 4785166 (1988-11-01), Kushima
patent: 5197033 (1993-03-01), Watanabe et al.
patent: 5300765 (1994-04-01), Mizuta
patent: 5331599 (1994-07-01), Yero
F. Goodenough, "Host CPU's IC Managers Power For PCMCIA Cards", Electronic Design magazine, Sep. 5, 1994, pp. 47-52.

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