JPS5753893A - Read-only storage device - Google Patents

Read-only storage device

Info

Publication number
JPS5753893A
JPS5753893A JP12885380A JP12885380A JPS5753893A JP S5753893 A JPS5753893 A JP S5753893A JP 12885380 A JP12885380 A JP 12885380A JP 12885380 A JP12885380 A JP 12885380A JP S5753893 A JPS5753893 A JP S5753893A
Authority
JP
Japan
Prior art keywords
diode
fuse
write
power source
terminal
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
Application number
JP12885380A
Other languages
Japanese (ja)
Inventor
Shinji Saito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12885380A priority Critical patent/JPS5753893A/en
Publication of JPS5753893A publication Critical patent/JPS5753893A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/14—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
    • G11C17/18—Auxiliary circuits, e.g. for writing into memory

Landscapes

  • Read Only Memory (AREA)

Abstract

PURPOSE:To relieve the write-in defect without giving any effect to the peripheral circuits, by connecting the collector of an npn transistor to a power source and a chip selection signal line via a diode. CONSTITUTION:The collector region of an npn transistor 11 forming a memrory cell of a PROM is made common, and the emitter of the transistor 11 is connected to a bit selection line BL via a fuse 12, and the base is connected to a word selection line WL respectively. At the same time, the collector region is connected to a power source VCC via a diode 13 as well as to a chip selection terminal CS via a diode 14. When a write-in defect arises, the voltage applied to the fuse 12 increases to blow the fuse 12. In this instant, the backward voltage is applied to the diode 13 to prevent the detouring of current to the source VCC from a terminal CS.
JP12885380A 1980-09-17 1980-09-17 Read-only storage device Pending JPS5753893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12885380A JPS5753893A (en) 1980-09-17 1980-09-17 Read-only storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12885380A JPS5753893A (en) 1980-09-17 1980-09-17 Read-only storage device

Publications (1)

Publication Number Publication Date
JPS5753893A true JPS5753893A (en) 1982-03-31

Family

ID=14994985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12885380A Pending JPS5753893A (en) 1980-09-17 1980-09-17 Read-only storage device

Country Status (1)

Country Link
JP (1) JPS5753893A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185817A (en) * 1984-03-06 1985-09-21 Ube Ind Ltd Preparation of inorganic yarn having high strength
JPS6234481A (en) * 1985-08-07 1987-02-14 Canon Inc Video signal processor
JPS62189700A (en) * 1986-01-17 1987-08-19 テキサス　インスツルメンツ　インコ−ポレイテツド Programmable memory matrix

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185817A (en) * 1984-03-06 1985-09-21 Ube Ind Ltd Preparation of inorganic yarn having high strength
JPS6325083B2 (en) * 1984-03-06 1988-05-24 Ube Industries
JPS6234481A (en) * 1985-08-07 1987-02-14 Canon Inc Video signal processor
JPS62189700A (en) * 1986-01-17 1987-08-19 テキサス　インスツルメンツ　インコ−ポレイテツド Programmable memory matrix

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