> On the transmit end, the outgoing data is guaranteed to be valid at > least 1 ns before the outgoing strobe's active edge, and remain valid > no less than 1 ns after. In other words, the worst-case minimum data > valid window is 2 ns wide. It's probably the other way around. The 2ns is the data INvalid window. They guarantee that it remains stable up until 1ns before strobe, and starts changing again as early as 1ns after strobe. It changes somewhere in there; goodness is when both times at the transmit end are small. The data valid time depends on the time between strobes. This is a case where timing diagrams really would help. Though some people do, I don't like using "setup" and "hold" times when talking about driven (output) signals. Personal preference. Andy ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu