发明授权
- 专利标题： Electrostatic discharge protection circuitry for any two external pins of an I.C. package
- 专利标题（中）： 任何两个外部引脚的静电放电保护电路 包
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申请号： US212282申请日： 1988-06-27
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公开(公告)号： US4870530A公开(公告)日： 1989-09-26
- 发明人: Roger S. Hurst , Glen Gilfeather
- 申请人： Roger S. Hurst , Glen Gilfeather
- 申请人地址： CA Sunnyvale
- 专利权人： Advanced Micro Devices, Inc.
- 当前专利权人： Advanced Micro Devices, Inc.
- 当前专利权人地址： CA Sunnyvale
- 主分类号： H01L27/06
- IPC分类号： H01L27/06 ; H01L27/02 ; H05F3/02
摘要：
A protective circuit for bipolar integrated circuits to prevent inadvertent damage caused by electrostatic discharge includes a plurality of clamping networks (12a-12n). Each of the plurality of clamping networks (12a-12n). is connected between a corresponding one of a number of external input/output pins (P1-Pn) of the integrated circuit and a common bus line (14) which is connected to an external substrate pin (PS). Each of the plurality of clamping networks (12a-12n) includes a silicon-controlled rectifier (T1), a diode (D1), a first resistor (R1) and a second resistor (R2). When any one of the number of external input/output pins (P1-Pn) receives a voltage higher than a predeter-mined value and any remaining one of the external input/output pins (P1-Pn) contacts a ground potential, a discharge path is formed by a single silicon-controlled rectifier and a single diode so as to protect an internal circuit portion.
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