Hybrid integrated circuit device and method of fabricating the s

Details Hybrid integrated circuit device and method of fabricating the s Hybrid integrated circuit device and method of fabricating the s

1997-08-25

1999-03-30

Nelms, David

Static information storage and retrieval

Powering

365226, 36518909, 327530, G11C 700

Patent

active

058897224

ABSTRACT:
An IC which integrates an EPROM is disposed on a circuit board. Also, a pad for supplying a writing voltage to the EPROM and a voltage supplying circuit, for supplying a power voltage to power terminals of the IC, which includes a first transistor and a second transistor, are disposed on the circuit board. When the pad is supplied with a high voltage for writing the data in the EPROM, the first transistor is on, the second transistor is off, and the voltage is supplied to the EPROM as the writing voltage. When data are read from the EPROM after the circuit board is packaged, because the pad is not supplied with any voltage, the first transistor is off, the second transistor is on, and a reading voltage is supplied to the EPROM via the outer terminal.

REFERENCES:
patent: 5287320 (1994-02-01), Adachi et al.
patent: 5444664 (1995-08-01), Kuroda et al.
patent: 5572478 (1996-11-01), Sato et al.
patent: 5694364 (1997-12-01), Morishita et al.

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