Semiconductor integrated circuit device

Details Semiconductor integrated circuit device Semiconductor integrated circuit device

2007-04-03

2007-04-03

Le, Thong Q. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Including level shift or pull-up circuit

C365S189090

Reexamination Certificate

active

11156648

ABSTRACT:
A semiconductor integrated circuit device with reduced consumption current is provided. A first step-down circuit stationarily forms internal voltage lower than supply voltage supplied through an external terminal. A second step-down circuit is switched between first mode and second mode according to control signals. In first mode, the internal voltage is formed from the supply voltage supplied through the external terminal and is outputted through a second output terminal. In second mode, operating current for a control system that forms the internal voltage is interrupted and an output high impedance state is established. The first output terminal of the first step-down circuit and the second output terminal of the second step-down circuit are connected in common, and the internal voltage is supplied to internal circuits.

REFERENCES:
patent: 2003/0193349 (2003-10-01), Shimizu et al.
patent: 2004/0174148 (2004-09-01), Hiraki et al.
patent: 02-244488 (1990-09-01), None
patent: 2002-032975 (2001-08-01), None

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