Programmable input/output driver circuit capable of operating at

Details Programmable input/output driver circuit capable of operating at Programmable input/output driver circuit capable of operating at

1995-12-01

1996-12-10

Westin, Edward P.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 50, 326121, H03K 190175

Patent

active

055834540

ABSTRACT:
An integrated circuit is presented having a driver circuit programmable to produce a variety of output voltages and conductive to the voltage levels of circuits interfaced by the integrated circuit. The integrated circuit includes programmable pullup and pulldown functions. The integrated circuit may be configured into an application having devices powered by a power supply voltage which is substantially larger than the voltage supplying the core section of the integrated circuit. Additionally, the present integrated circuit may be configured into other applications having devices powered by a power supply voltage substantially similar to the voltage supplying the integrated circuit core section. The present integrated circuit therefore retains utility for a large variety of applications. The pullup and pulldown transistors may be programmed to provide a resistive one, resistive zero, or neither.

REFERENCES:
patent: 5097149 (1992-03-01), Lee
patent: 5175445 (1992-12-01), Kinugasa
patent: 5410267 (1995-04-01), Haycock et al.
patent: 5465054 (1995-11-01), Erhart
patent: 5477172 (1995-12-01), Schnizlein
patent: 5479116 (1995-12-01), Sallaerts

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