Semiconductor memory device having circuit for changing electric

Details Semiconductor memory device having circuit for changing electric Semiconductor memory device having circuit for changing electric

1998-02-06

1999-10-12

Fears, Terrell W.

Static information storage and retrieval

Read/write circuit

Bad bit

365 96, G11C 1300

Patent

active

059663359

ABSTRACT:
In a semiconductor memory device, a characteristic changing circuit is connected with a signal line for transmitting an output control signal. If a fuse is normally blown, a fuse is blown together with a fuse for redundant replacement, and otherwise both fuses are not blown. If the fuse blowing is defective, the potential of a signal line is brought to a ground potential level based on a wafer test control signal. As a result, the output control signal is fixed at an L level, and the potential of a data input/output terminal is brought to a high impedance state.

REFERENCES:
patent: 5687125 (1997-11-01), Kikuchi

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