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Datasheet
53
Signal Quality Specifications
5
Signal Quality Specifications
Source synchronous data transfer requires the clean reception of data signals and their 
associated strobes. Ringing below receiver thresholds, non-monotonic signal edges, 
and excessive voltage swing will adversely affect system timings. Ringback and signal 
non-monotonicity cannot be tolerated since these phenomena may inadvertently 
advance receiver state machines. Excessive signal swings (overshoot and undershoot) 
are detrimental to silicon gate oxide integrity, and can cause device failure if absolute 
voltage limits are exceeded. Additionally, overshoot and undershoot can cause timing 
degradation due to the build up of inter-symbol interference (ISI) effects.
For these reasons, it is important that the design ensures acceptable signal quality 
across all systematic variations encountered in volume manufacturing.
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