Switchable power domains for 1.2V and 3.3V pad voltages

Details Switchable power domains for 1.2V and 3.3V pad voltages Switchable power domains for 1.2V and 3.3V pad voltages

2005-09-13

2005-09-13

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S062000, C326S068000, C326S081000

Reexamination Certificate

active

06943587

ABSTRACT:
An integrated circuit includes a core circuit and a buffer circuit. The buffer circuit includes a plurality of input buffers and a plurality of output buffers that service a plurality of voltage domains on a single set of input/output lines. These voltage domains are controllable to service multiple voltage levels, consistent with various interface standards. In one construction, the core circuit operates at 1.2 volts and the buffer circuit supports both a 1.2 volts interface standard and a 3.3 volts interface standard.

REFERENCES:
patent: 5506535 (1996-04-01), Ratner
patent: 6501301 (2002-12-01), Taguchi

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