Chapter 7. Manufacturing Variation Modeling

Dan Oh

The voltage and timing budget analysis, discussed in Chapter 6, “Channel Voltage and Timing Budget,” must guarantee reliable channel operations in the real world. This means that for high-volume manufacturing (HVM), the channel must be robust, even under worst-case operating conditions. To this end, variations in the channel (such as trace impedances and the material properties of the packages and printed circuit boards [PCBs]) and process variations in the transmitter and receiver must be considered in the channel analysis. Accurately characterizing these variations will result in a more relaxed and/or realistic specification of these parameters. Accurate specifications improve the component ...

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