[ntp:questions] ntp server specs
David Woolley
david at ex.djwhome.demon.invalid
Wed Jun 15 06:36:36 UTC 2011
Chuck Swiger wrote:
> TTL voltage swings rather than needing the +/- 3V minimum of RS-232;
> they also are in-spec with up to ten receivers on the line.
The +/-3V monotonic swing is a requirement on the driver, not the
receiver; the transition region requirement for the receiver is much
narrower and being all above zero is actually encouraged (so that
undriven lines end up in the right state.
More information about the questions
mailing list