
USB2.0 Basics - Signal Rates & Levels
Low Speed Full Speed Hi-Speed
Sig Rate 1.5Mbps 12Mbps 480Mbps
Sig Level 3.3V 3.3V 400mV
Rise and Fall Times 75ns < Tr <300ns 4ns < Tr < 20ns Tr > 500ps*
*High Speed USB edge rate compliance measurement method and
pass/fail criteria have been changed. This will be explained in the
compliance requirements section.
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