发明名称 |
Switchable MCM CMOS I/O buffers |
摘要 |
A switchable I/O buffer for multi-chip modules comprising a conventional I/O buffer and a miniaturized I/O buffer. A path switch selects the conventional I/O buffer or the minaturized I/O buffer according to whether the I/O interconnection is for communication off the module or chip-to-chip communication within the module. The miniaturized I/O buffer comprises a single-ended I/O buffer without electrostatic discharge protection. Two layout structures are designed for the switchable I/O buffer. A first layout structure having its path switching control provided by either a cell-programmable method or a mask-programmable method can be used for a multi-chip module or a PWB single package. A second layout structure using a pad-programmable method to provide the path switching control is suitable for a multi-chip module with flip-chip attachment technology. Four different circuit implementations of the switchable I/O buffer are presented. The switchable I/O buffer achieves higher performance with lower power dissipation in that the unnecessary heavy loading and electrostatic discharge protection are eliminated from the interconnection for chip-to-chip communication within the multi-chip module. |
申请公布号 |
US5903168(A) |
申请公布日期 |
1999.05.11 |
申请号 |
US19970822413 |
申请日期 |
1997.03.21 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITIUTE |
发明人 |
YANG, JYH-REN;CHANG, CHUNG-TAO;CHIEN, RUEY-WEN |
分类号 |
H03K19/0175;(IPC1-7):H03K19/017 |
主分类号 |
H03K19/0175 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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