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JPH05243472A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

Info

Publication number
JPH05243472A
JPH05243472AJP4039993AJP3999392AJPH05243472AJP H05243472 AJPH05243472 AJP H05243472AJP 4039993 AJP4039993 AJP 4039993AJP 3999392 AJP3999392 AJP 3999392AJP H05243472 AJPH05243472 AJP H05243472A
Authority
JP
Japan
Prior art keywords
lead pin
analog
circuit
terminal
semiconductor integrated
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
JP4039993A
Other languages
Japanese (ja)
Inventor
Narikazu Tanaka
成和 田中
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.)
NEC IC Microcomputer Systems Co Ltd
Original Assignee
NEC IC Microcomputer Systems 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 NEC IC Microcomputer Systems Co LtdfiledCriticalNEC IC Microcomputer Systems Co Ltd
Priority to JP4039993ApriorityCriticalpatent/JPH05243472A/en
Publication of JPH05243472ApublicationCriticalpatent/JPH05243472A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To prevent that logical inversion of a digital signal propagates as noise to an analog circuit, and causes malfunction to the analog circuit, in a semiconductor integrated circuit containing digital circuits and analog circuits. CONSTITUTION:A lead pin 105 is arranged between a lead pin 104 dealing with a digital signal and a lead pin 106 dealing with an analog signal, which lead pin 105 is connected with a fixed potential or terminated with the fixed potential. Hence the lead pin 104 and the lead pin 105 are arranged. Thereby the capacitance between the lead pin 104 and the lead pin 106 is isolated, and it is prevented that the logical inversion of the digital signal propagates as noise to the analog circuit and causes malfunction to the analog circuit.

Description

Translated fromJapanese
【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は半導体集積回路に関し、
特にデジタル回路とアナログ回路とを共に内蔵する半導
体集積回路に用いられるシールド回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor integrated circuit,
In particular, the present invention relates to a shield circuit used in a semiconductor integrated circuit that incorporates both a digital circuit and an analog circuit.

【0002】[0002]

【従来の技術】近年、半導体集積回路は、市場の高集積
化,高機能化の要求により、デジタル回路とアナログ回
路とを単一チップ上に内蔵している。
2. Description of the Related Art In recent years, semiconductor integrated circuits incorporate a digital circuit and an analog circuit on a single chip due to the demand for higher integration and higher functionality in the market.

【0003】また、パッケージの小型化により、リード
ピンの間隔はせまくなってきている。前述の半導体集積
回路に用いられるパッケージのリードピンと半導体チッ
プとの接続状態を示す平面図を、図4に示す。
Further, due to the miniaturization of the package, the distance between the lead pins has become narrower. FIG. 4 is a plan view showing a connection state between the lead pins of the package used in the semiconductor integrated circuit and the semiconductor chip.

【0004】図4の半導体集積回路では、デジタル回路
402に接続されデジタル信号を扱う端子405と、ア
ナログ回路403に接続されアナログ信号を扱う端子4
06とは、パッケージ基体400中の半導体チップ40
1上で、隣傍に配置されており、前述の2つの端子40
5,406は、ボンディング線413,414を介し
て、各々リードピン409,リードピン410に接続さ
れている。
In the semiconductor integrated circuit of FIG. 4, a terminal 405 connected to the digital circuit 402 for handling digital signals and a terminal 4 connected to the analog circuit 403 for handling analog signals.
06 is the semiconductor chip 40 in the package base 400.
1 and the two terminals 40, which are arranged next to each other and are connected to each other.
5, 406 are connected to the lead pin 409 and the lead pin 410, respectively, via bonding wires 413, 414.

【0005】尚、端子404と端子407とは、前記二
つの端子405,406を介して存在し、それぞれボン
ディング線412,415,リードピン408,41
1,デジタル,アナログ信号端子416,417に電気
的に接続されている。
The terminal 404 and the terminal 407 are present via the two terminals 405 and 406, and the bonding wires 412, 415 and the lead pins 408, 41, respectively.
1, digital and analog signal terminals 416 and 417 are electrically connected.

【0006】[0006]

【発明が解決しようとする課題】この従来の半導体集積
回路では、デジタル回路402に接続されたリードピン
409とアナログ回路403に接続されたリードピン4
10とが隣り合っているため、デジタル信号の論理反転
が前述の2つのリードピン409,410間の線間容量
によって、アナログ信号にノイズとして伝播し、アナロ
グ回路の誤動作もしくは特性悪化を招く。
In this conventional semiconductor integrated circuit, the lead pin 409 connected to the digital circuit 402 and the lead pin 4 connected to the analog circuit 403 are used.
Since 10 and 10 are adjacent to each other, the logic inversion of the digital signal propagates as noise to the analog signal due to the line capacitance between the two lead pins 409 and 410 described above, which causes malfunction of the analog circuit or deterioration of characteristics.

【0007】このため、ゲインの大きなアンプの端子を
デジタル信号端子に隣接して配置できない等、パッケー
ジのピン配置の自由度が制限され、かつ、アナログ回路
のノイズマージンを大きくする等、回路設計上の制約を
受けるという問題点があった。
Therefore, in terms of circuit design, the degree of freedom in pin arrangement of the package is limited, for example, the terminal of the amplifier having a large gain cannot be arranged adjacent to the digital signal terminal, and the noise margin of the analog circuit is increased. There was a problem of being restricted by.

【0008】本発明の目的は、前記問題点を解決し、回
路設計上の制約を受けずに済むようにした半導体集積回
路を提供することにある。
An object of the present invention is to provide a semiconductor integrated circuit which solves the above-mentioned problems and is not restricted by circuit design.

【0009】[0009]

【課題を解決するための手段】本発明半導体集積回路の
構成は、半導体チップ上に設けたデジタル信号を扱う端
子とアナログ信号を扱う端子とにそれぞれボンディング
線を介して接続されたリードピン間に、固定電位に接続
又は固定電位で終端したリードピンを介在させたことを
特徴とする。
According to the present invention, there is provided a semiconductor integrated circuit comprising: a semiconductor chip; a terminal for handling a digital signal and a terminal for handling an analog signal, which are provided on a semiconductor chip; It is characterized in that a lead pin connected to or fixed at a fixed potential is interposed.

【0010】[0010]

【実施例】図1は本発明の第1の実施例の半導体集積回
路の平面図である。
1 is a plan view of a semiconductor integrated circuit according to a first embodiment of the present invention.

【0011】図1において、本実施例は、デジタル回路
114に接続されデジタル信号を扱う端子117と、ア
ナログ回路115とに接続されアナログ信号を扱う端子
118とは半導体チップ102上では隣り合って配置さ
れている。
In FIG. 1, in this embodiment, a terminal 117 connected to the digital circuit 114 for handling digital signals and a terminal 118 connected to the analog circuit 115 for handling analog signals are arranged adjacent to each other on the semiconductor chip 102. Has been done.

【0012】これら端子117,118は、ボンディン
グ線109,110を介してリードピン104,リード
ピン106に各々接続され、この1組のリードピン10
4,106の間には、接地電位に接続されたリードピン
105が介在する。
These terminals 117 and 118 are connected to the lead pin 104 and the lead pin 106 via the bonding wires 109 and 110, respectively.
A lead pin 105 connected to the ground potential is interposed between 4, 106.

【0013】尚、デジタル回路114からは、端子11
6にも引き出され、ボンディング線108を介してリー
ドピン103に接続され、リードピン103,104と
で、デジタル信号端子112を形成する。アナログ回路
115からは、端子119にも引き出され、ボンディン
グ線111を介してリードピン107に接続され、リー
ドピン106,107とで、アナログ信号端子113を
形成する。リードピン103〜107の内部端と、ボン
ディング線108〜111と、半導体チップ102は、
パッケージ基体101で覆われている。
From the digital circuit 114, the terminal 11
6 is also drawn out and is connected to the lead pin 103 via a bonding wire 108, and together with the lead pins 103 and 104, a digital signal terminal 112 is formed. The analog circuit 115 is also drawn to a terminal 119 and connected to a lead pin 107 via a bonding wire 111, and the lead pins 106 and 107 form an analog signal terminal 113. The inner ends of the lead pins 103 to 107, the bonding wires 108 to 111, and the semiconductor chip 102 are
It is covered with the package base 101.

【0014】図2は本発明の第2の実施例の平面図であ
る。図2において、本実施例は、デジタル信号を扱うリ
ードピン204とアナログ信号を扱うリードピン207
との間に複数のリードピン205,206を持つ例であ
る。デジタル回路217に接続されデジタル信号を扱う
端子220と、アナログ回路218に接続されアナログ
信号を扱う端子221は半導体チップ202上で隣り合
って配置されている。前述の端子220,221は、ボ
ンディング線210,211を介してリードピン20
4,リードピン207に各々接続され、この1組のリー
ドピン204,207の間には、固定電位に接続された
リードピン206を備える他に、どこにも接続されない
リードピン205を備える。
FIG. 2 is a plan view of the second embodiment of the present invention. Referring to FIG. 2, in this embodiment, a lead pin 204 that handles a digital signal and a lead pin 207 that handles an analog signal.
This is an example in which a plurality of lead pins 205 and 206 are provided between and. A terminal 220 connected to the digital circuit 217 for handling digital signals and a terminal 221 connected to the analog circuit 218 for handling analog signals are arranged adjacent to each other on the semiconductor chip 202. The terminals 220 and 221 are connected to the lead pin 20 via the bonding wires 210 and 211.
4, a lead pin 206 connected to a fixed potential and a lead pin 205 connected to nowhere are provided between the pair of lead pins 204 and 207.

【0015】尚、パッケージ基体201内の半導体チッ
プ202内には、デジタル回路217に接続された端子
219,ボンディング線209,アナログ回路218に
接続された端子222,ボンディング線212もある。
さらに、リードピン203,204でデジタル信号端子
213を形成し、リードピン207,208でアナログ
信号端子216を形成する。
The semiconductor chip 202 in the package base 201 also has a terminal 219 connected to the digital circuit 217, a bonding wire 209, and a terminal 222 and a bonding wire 212 connected to the analog circuit 218.
Further, the lead pins 203 and 204 form a digital signal terminal 213, and the lead pins 207 and 208 form an analog signal terminal 216.

【0016】図3は本発明の第3の実施例の平面図であ
る。図3において、本実施例は、リードピンがパッケー
ジ基体301のコーナーに配置された例である。
FIG. 3 is a plan view of the third embodiment of the present invention. In FIG. 3, the present embodiment is an example in which the lead pins are arranged at the corners of the package base 301.

【0017】デジタル回路314に接続されデジタル信
号を扱う端子317とアナログ回路315に接続されア
ナログ信号を扱う端子318は半導体チップ302上で
隣り合って配置されている。
A terminal 317 connected to the digital circuit 314 for handling digital signals and a terminal 318 connected to the analog circuit 315 for handling analog signals are arranged adjacent to each other on the semiconductor chip 302.

【0018】前述の端子317,318は、ボンディン
グ線309,310を介してリードピン304,リード
ピン306に各々接続され、この1組のリードピン30
4,306の間には、接地電位に接続されたリードピン
305が介在する。
The above-mentioned terminals 317 and 318 are respectively connected to the lead pins 304 and 306 via the bonding wires 309 and 310, and this set of lead pins 30 is connected.
A lead pin 305 connected to the ground potential is interposed between 4, 306.

【0019】尚、デジタル回路314に接続された端子
316は、ボンディング線308を介して、リードピン
303に接続され、リードピン304と共にデジタル信
号端子312を形成する。またアナログ回路315に接
続された端子319は、ボンディング線311を介して
リードピン307に接続され、リードピン306と共に
アナログ信号端子313を形成する。
The terminal 316 connected to the digital circuit 314 is connected to the lead pin 303 via the bonding wire 308 and forms the digital signal terminal 312 together with the lead pin 304. Further, the terminal 319 connected to the analog circuit 315 is connected to the lead pin 307 via the bonding wire 311, and forms the analog signal terminal 313 together with the lead pin 306.

【0020】[0020]

【発明の効果】以上説明したように、本発明は、デジタ
ル信号を扱うリードピンとアナログ信号を扱うリードピ
ンの間に、固定電位に接続又は固定電位で終端したリー
ドピンを設ける構造としたため、2つのリードピン間の
線間容量は、間に設けたリードピンにより分離され、デ
ジタル信号の論理反転がアナログ信号にノイズとして伝
播することがなくなり、よってデジタル信号端子にアナ
ログ信号端子を隣りに配置でき、パッケージのピン配置
が自由になるという効果があり、またアナログ回路の設
計においてノイズマージンを大きくする必要がなく、回
路設計上の自由度が増大するという効果を有する。
As described above, the present invention has the structure in which the lead pin connected to the fixed potential or terminated at the fixed potential is provided between the lead pin handling the digital signal and the lead pin handling the analog signal. The line capacitance between them is separated by the lead pin provided between them, and the logic inversion of the digital signal does not propagate as noise to the analog signal. Therefore, the analog signal terminal can be placed next to the digital signal terminal, and the package pin There is an effect that the arrangement is free, and there is no need to increase the noise margin in the design of the analog circuit, and the degree of freedom in the circuit design is increased.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1の実施例の半導体集積回路を示す
平面図である。
FIG. 1 is a plan view showing a semiconductor integrated circuit according to a first embodiment of the present invention.

【図2】本発明の第2の実施例の平面図である。FIG. 2 is a plan view of a second embodiment of the present invention.

【図3】本発明の第3の実施例の平面図である。FIG. 3 is a plan view of a third embodiment of the present invention.

【図4】従来例の半導体集積回路を示す平面図である。FIG. 4 is a plan view showing a conventional semiconductor integrated circuit.

【符号の説明】[Explanation of symbols]

101,201,301,400 パッケージ基体 102,202,302,401 半導体チップ 103〜107,203〜208,303〜307,4
08〜411 リードピン 108〜111,209〜212,308〜311,4
12〜415 ボンディング線 112,213,312,416 デジタル信号端子 113,216,313,417 アナログ信号端子 114,217,314,402 デジタル回路 115,218,315,403 アナログ回路
101, 201, 301, 400 Package base 102, 202, 302, 401 Semiconductor chip 103-107, 203-208, 303-307, 4
08-411 Lead pins 108-111, 209-212, 308-311, 4
12 to 415 Bonding wire 112, 213, 312, 416 Digital signal terminal 113, 216, 313, 417 Analog signal terminal 114, 217, 314, 402 Digital circuit 115, 218, 315, 403 Analog circuit

Claims (1)

Translated fromJapanese
【特許請求の範囲】[Claims]【請求項1】 半導体チップ上に設けたデジタル信号を
扱う端子とアナログ信号を扱う端子とにそれぞれボンデ
ィング線を介して接続されたリードピン間に、固定電位
に接続又は固定電位で終端したリードピンを介在させた
ことを特徴とする半導体集積回路。
1. A lead pin connected to a fixed potential or terminated at a fixed potential is interposed between lead pins connected to a digital signal handling terminal and an analog signal handling terminal provided on a semiconductor chip via bonding wires. A semiconductor integrated circuit characterized by the above.
JP4039993A1992-02-271992-02-27Semiconductor integrated circuitPendingJPH05243472A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP4039993AJPH05243472A (en)1992-02-271992-02-27Semiconductor integrated circuit

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP4039993AJPH05243472A (en)1992-02-271992-02-27Semiconductor integrated circuit

Publications (1)

Publication NumberPublication Date
JPH05243472Atrue JPH05243472A (en)1993-09-21

Family

ID=12568460

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP4039993APendingJPH05243472A (en)1992-02-271992-02-27Semiconductor integrated circuit

Country Status (1)

CountryLink
JP (1)JPH05243472A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
WO2003105226A1 (en)*2002-06-052003-12-18株式会社 ルネサステクノロジSemiconductor device
JP2005123591A (en)*2003-09-252005-05-12Rohm Co LtdSemiconductor device and electronic apparatus packaging the same
JP2007059885A (en)*2005-07-222007-03-08Marvell World Trade LtdPackaging for high-speed integrated circuit
US7884451B2 (en)2005-07-222011-02-08Marvell World Trade Ltd.Packaging for high speed integrated circuits
JP2016025199A (en)*2014-07-182016-02-08セイコーエプソン株式会社 Circuit device, electronic device and moving body
US9484857B2 (en)2013-11-072016-11-01Seiko Epson CorporationSemiconductor circuit device, electronic device, electronic apparatus, and moving object
US9641366B2 (en)2014-07-182017-05-02Seiko Epson CorporationWireless communication device, electronic apparatus, and moving object

Citations (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02263462A (en)*1989-04-031990-10-26Mitsubishi Electric CorpSemiconductor device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02263462A (en)*1989-04-031990-10-26Mitsubishi Electric CorpSemiconductor device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
WO2003105226A1 (en)*2002-06-052003-12-18株式会社 ルネサステクノロジSemiconductor device
CN100377347C (en)*2002-06-052008-03-26株式会社瑞萨科技Semiconductor device with a plurality of transistors
US7482699B2 (en)2002-06-052009-01-27Renesas Technology Corp.Semiconductor device
CN100508175C (en)2002-06-052009-07-01株式会社瑞萨科技 Semiconductor device
JP2005123591A (en)*2003-09-252005-05-12Rohm Co LtdSemiconductor device and electronic apparatus packaging the same
JP2007059885A (en)*2005-07-222007-03-08Marvell World Trade LtdPackaging for high-speed integrated circuit
US7884451B2 (en)2005-07-222011-02-08Marvell World Trade Ltd.Packaging for high speed integrated circuits
US9484857B2 (en)2013-11-072016-11-01Seiko Epson CorporationSemiconductor circuit device, electronic device, electronic apparatus, and moving object
JP2016025199A (en)*2014-07-182016-02-08セイコーエプソン株式会社 Circuit device, electronic device and moving body
US9641366B2 (en)2014-07-182017-05-02Seiko Epson CorporationWireless communication device, electronic apparatus, and moving object
US9984991B2 (en)2014-07-182018-05-29Seiko Epson CorporationCircuit device, electronic apparatus and moving object

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