JPS6427099A - Semiconductor memory device - Google Patents
Semiconductor memory deviceInfo
- Publication number
- JPS6427099A JPS6427099A JP62183159A JP18315987A JPS6427099A JP S6427099 A JPS6427099 A JP S6427099A JP 62183159 A JP62183159 A JP 62183159A JP 18315987 A JP18315987 A JP 18315987A JP S6427099 A JPS6427099 A JP S6427099A
- Authority
- JP
- Japan
- Prior art keywords
- dbi
- lines
- data
- input output
- unit cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
Abstract
PURPOSE:To practically improve the yield of the titled device by selectively connecting a unit cell array consisting of sound cells only to the data line of a data bus. CONSTITUTION:By operating and setting change-over switches 21..., a change- over switch 20 selectively connects three data lines DBi-DBi+2 to one input output data line out of the four lines IO1-IO4. Presently, only the sound cell out of unit cell arrays MC1-MC4 of a memory matrix 11 are connected through an input output terminal IO to the data lines DB1-DB3. The same is operated for the other switching circuits 20,....
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183159A JPS6427099A (en) | 1987-07-22 | 1987-07-22 | Semiconductor memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183159A JPS6427099A (en) | 1987-07-22 | 1987-07-22 | Semiconductor memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6427099A true JPS6427099A (en) | 1989-01-30 |
Family
ID=16130830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62183159A Pending JPS6427099A (en) | 1987-07-22 | 1987-07-22 | Semiconductor memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6427099A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06150687A (en) * | 1990-10-30 | 1994-05-31 | Sun Microsyst Inc | Method of bypassing flaw and its circuit |
JPH07153296A (en) * | 1993-11-26 | 1995-06-16 | Nec Corp | Semiconductor memory |
US5574729A (en) * | 1990-09-29 | 1996-11-12 | Mitsubishi Denki Kabushiki Kaisha | Redundancy circuit for repairing defective bits in semiconductor memory device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111194A (en) * | 1980-01-18 | 1981-09-02 | Chiyou Lsi Gijutsu Kenkyu Kumiai | Semiconductor memory |
JPS59168993A (en) * | 1983-03-16 | 1984-09-22 | Hitachi Ltd | Semiconductor memory |
JPS6161300A (en) * | 1984-09-03 | 1986-03-29 | Hitachi Ltd | Defect relief circuit |
-
1987
- 1987-07-22 JP JP62183159A patent/JPS6427099A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111194A (en) * | 1980-01-18 | 1981-09-02 | Chiyou Lsi Gijutsu Kenkyu Kumiai | Semiconductor memory |
JPS59168993A (en) * | 1983-03-16 | 1984-09-22 | Hitachi Ltd | Semiconductor memory |
JPS6161300A (en) * | 1984-09-03 | 1986-03-29 | Hitachi Ltd | Defect relief circuit |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5574729A (en) * | 1990-09-29 | 1996-11-12 | Mitsubishi Denki Kabushiki Kaisha | Redundancy circuit for repairing defective bits in semiconductor memory device |
JPH06150687A (en) * | 1990-10-30 | 1994-05-31 | Sun Microsyst Inc | Method of bypassing flaw and its circuit |
JPH09578U (en) * | 1990-10-30 | 1997-12-22 | サン・マイクロシステムズ・インコーポレーテッド | Circuit that bypasses defects |
JPH07153296A (en) * | 1993-11-26 | 1995-06-16 | Nec Corp | Semiconductor memory |
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