JPS5791550A - Integrated circuit with protecting circuit - Google Patents

Integrated circuit with protecting circuit

Info

Publication number
JPS5791550A
JPS5791550A JP16749280A JP16749280A JPS5791550A JP S5791550 A JPS5791550 A JP S5791550A JP 16749280 A JP16749280 A JP 16749280A JP 16749280 A JP16749280 A JP 16749280A JP S5791550 A JPS5791550 A JP S5791550A
Authority
JP
Japan
Prior art keywords
logic circuit
circuit
transistor
voltage
protecting
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
JP16749280A
Other languages
Japanese (ja)
Inventor
Kazunobu Adachi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16749280A priority Critical patent/JPS5791550A/en
Publication of JPS5791550A publication Critical patent/JPS5791550A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection

Landscapes

  • Semiconductor Integrated Circuits (AREA)

Abstract

PURPOSE:To prevent the damage of a logic circuit part of an IC even if erroneously inserted and connected by sealing a unidirectional conductive element in the package of the IC together with a logic circuit IC chip. CONSTITUTION:When the positive and negative of the polarity of a voltage to be applied to an IC is erroneously applied to a terminal 3 with negative voltage and to a terminal 8 with positive voltage, the junction between the emitter and base of the transistor 6 of a protecting circuit 2 is reversely biased, causing the transistor 6 to be cut off, with the result that the current flowing between the emitter and the collector of the transistor becomes zero. Therefore, reverse po- larity is not applied between the lines A and B at both ends of the logic circuit 1, and many transistors of the logic circuit 1 can be avoided from being damaged.
JP16749280A 1980-11-28 1980-11-28 Integrated circuit with protecting circuit Pending JPS5791550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16749280A JPS5791550A (en) 1980-11-28 1980-11-28 Integrated circuit with protecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16749280A JPS5791550A (en) 1980-11-28 1980-11-28 Integrated circuit with protecting circuit

Publications (1)

Publication Number Publication Date
JPS5791550A true JPS5791550A (en) 1982-06-07

Family

ID=15850677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16749280A Pending JPS5791550A (en) 1980-11-28 1980-11-28 Integrated circuit with protecting circuit

Country Status (1)

Country Link
JP (1) JPS5791550A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373718A2 (en) * 1988-12-14 1990-06-20 Koninklijke Philips Electronics N.V. Recording and/or reproducing system and cassette for such a system
EP0422486A2 (en) * 1989-10-09 1991-04-17 STMicroelectronics S.r.l. Negative overvoltage protection circuit, in particular for output stages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373718A2 (en) * 1988-12-14 1990-06-20 Koninklijke Philips Electronics N.V. Recording and/or reproducing system and cassette for such a system
EP0422486A2 (en) * 1989-10-09 1991-04-17 STMicroelectronics S.r.l. Negative overvoltage protection circuit, in particular for output stages

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