Integrated circuit having an enabling circuit for controlling pr

Details Integrated circuit having an enabling circuit for controlling pr Integrated circuit having an enabling circuit for controlling pr

1989-10-23

1991-11-26

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 731, 324158T, 371 226, G01R 3102

Patent

active

050685996

ABSTRACT:
An integrated circuit (10) which includes primary circuit (12) and secondary circuit (17). An enabling circuit (16) allows package pins (15) to be shared between the primary circuit (12) and secondary circuit (17) responsive to voltages on the package pins (15). Enabling circuit (16) further includes disabling circuitry to disable the secondary circuit (17) responsive to a predetermined voltage on the V.sub.cc pin and enables the secondary circuit (17) responsive to a ground voltage on the V.sub.cc pin.

REFERENCES:
patent: 4138614 (1979-02-01), Ochi
patent: 4490673 (1984-12-01), Blum et al.
patent: 4550289 (1985-10-01), Kabashima et al.
patent: 4695750 (1987-09-01), Hara et al.
patent: 4720671 (1988-01-01), Tada et al.
patent: 4743841 (1988-05-01), Takeuchi
patent: 4782283 (1988-11-01), Zasio
patent: 4816757 (1989-03-01), Hutchins

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