A 960 Mbps/pin interface for skew-tolerant bus using low jitter PLL

This paper describes an I/O scheme for use as a high-speed bus which eliminates setup and hold time requirements between clock and data by using oversampling method. The I/O circuit uses low jitter PLL which suppresses the effect of supply noise. Two experimental chips with 4 pin interface have been fabricated with 0.6 /spl mu/m CMOS technology, which exhibits the bandwidth of 960 Mbps per pin.