JPS6476597A - Semiconductor memory device - Google Patents

Semiconductor memory device

Info

Publication number
JPS6476597A
JPS6476597A JP62233958A JP23395887A JPS6476597A JP S6476597 A JPS6476597 A JP S6476597A JP 62233958 A JP62233958 A JP 62233958A JP 23395887 A JP23395887 A JP 23395887A JP S6476597 A JPS6476597 A JP S6476597A
Authority
JP
Japan
Prior art keywords
redundant
address comparing
address
redundant address
comparing circuit
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.)
Granted
Application number
JP62233958A
Other languages
Japanese (ja)
Other versions
JP2599931B2 (en
Inventor
Kazumasa Yanagisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62233958A priority Critical patent/JP2599931B2/en
Publication of JPS6476597A publication Critical patent/JPS6476597A/en
Application granted granted Critical
Publication of JP2599931B2 publication Critical patent/JP2599931B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Static Random-Access Memory (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Dram (AREA)

Abstract

PURPOSE:To speed up the access time of a dynamic type RAM, etc., having a redundant word line or a redundant data line by fetching selectively the output signals of a redundant address comparing circuits and a non-redundant address comparing circuit only at the time of realizing conditions. CONSTITUTION:The titled device is provided with redundant address comparing circuits RAC0 and RAC1 and non-redundant address comparing circuits NRAC0 and NRAC1 to respectively decide that an address and a defective address designated from the outside coincide or do not coincide. Redundant word lines Wr0 and Wr1 are selectively made into a selective condition in accordance with the output signal of the corresponding redundant address comparing circuit RAC0 or RAC1. A non-redundant address detecting signal nra formed in accordance with the output signal of the non-redundant address comparing circuit NRAC0 or NRAC1 is supplied to a primary row address decoder RDCR1. Thus, time necessary for a word line selecting action is shortened and the access time can be speeded up.
JP62233958A 1987-09-18 1987-09-18 Semiconductor storage device Expired - Lifetime JP2599931B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233958A JP2599931B2 (en) 1987-09-18 1987-09-18 Semiconductor storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233958A JP2599931B2 (en) 1987-09-18 1987-09-18 Semiconductor storage device

Publications (2)

Publication Number Publication Date
JPS6476597A true JPS6476597A (en) 1989-03-22
JP2599931B2 JP2599931B2 (en) 1997-04-16

Family

ID=16963291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233958A Expired - Lifetime JP2599931B2 (en) 1987-09-18 1987-09-18 Semiconductor storage device

Country Status (1)

Country Link
JP (1) JP2599931B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02297646A (en) * 1989-05-12 1990-12-10 Matsushita Electric Ind Co Ltd Memory device
JPH03228300A (en) * 1990-01-31 1991-10-09 Nec Ic Microcomput Syst Ltd Semiconductor memory circuit
JPH05298891A (en) * 1992-04-17 1993-11-12 Mitsubishi Electric Corp Dynamic associative memory device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177946A (en) * 1984-09-26 1986-04-21 Hitachi Ltd semiconductor storage device
JPS62134899A (en) * 1985-12-06 1987-06-17 Mitsubishi Electric Corp Semiconductor memory device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177946A (en) * 1984-09-26 1986-04-21 Hitachi Ltd semiconductor storage device
JPS62134899A (en) * 1985-12-06 1987-06-17 Mitsubishi Electric Corp Semiconductor memory device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02297646A (en) * 1989-05-12 1990-12-10 Matsushita Electric Ind Co Ltd Memory device
JPH03228300A (en) * 1990-01-31 1991-10-09 Nec Ic Microcomput Syst Ltd Semiconductor memory circuit
JPH05298891A (en) * 1992-04-17 1993-11-12 Mitsubishi Electric Corp Dynamic associative memory device

Also Published As

Publication number Publication date
JP2599931B2 (en) 1997-04-16

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