Electronic digital logic circuitry – Interface – Current driving
Patent
1997-03-21
1999-05-11
Santamauro, Jon
Electronic digital logic circuitry
Interface
Current driving
326 82, H03K19/0175
Patent
active
059031689
ABSTRACT:
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.
Chang Chung-Tao
Chien Ruey-Wen
Yang Jyh-Ren
Industrial Technology Research Institiute
Le Don Phu
Santamauro Jon
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