Circuit for designating an operating mode of a semiconductor mem

Details Circuit for designating an operating mode of a semiconductor mem Circuit for designating an operating mode of a semiconductor mem

1996-04-10

1999-05-04

Zarabian, A.

Static information storage and retrieval

Read/write circuit

Bad bit

3652257, G11C 700

Patent

active

059010940

ABSTRACT:
A circuit for designating an operating mode of a packaged semiconductor memory device includes a first fuse mounted on the device. A plurality of pads mounted on the device are accessible to a user after the device is packaged. A mode selection circuit generates a first signal when the first fuse is open and a second signal when the first fuse is closed. A first-fuse opening circuit is operably connected to the pads and opens the first fuse responsive to a predetermined first-fuse cutting signal on the pads. In another aspect of the invention, a second fuse may be opened responsive to a predetermined second-fuse cutting signal on the pads. When the second fuse opens, the first-fuse opening circuit is disabled to prevent accidental opening of the first fuse when the desired operating mode requires the first fuse to be maintained intact.

REFERENCES:
patent: 4987325 (1991-01-01), Seo
patent: 4996672 (1991-02-01), Kim
patent: 5596536 (1997-01-01), Koh
patent: 5633827 (1997-05-01), Numata
patent: 5657280 (1997-08-01), Shin
patent: 5717654 (1998-02-01), Manning

Affiliated with

Also associated with

Rating

Circuit for designating an operating mode of a semiconductor mem does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for designating an operating mode of a semiconductor mem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for designating an operating mode of a semiconductor mem will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1874795