Datasheet

50 www.national.com
DP83847
6.4.5 100BASE-TX Transmit Timing (t
R/F
& Jitter)
Note1: Normal Mismatch is the difference between the maximum and minimum of all rise and fall times.
Note2: Rise and fall times taken at 10% and 90% of the +1 or -1 amplitude.
Parameter Description Notes Min Typ Max Units
T4.5.1 100 Mb/s TD± t
R
and t
F
345ns
100 Mb/s t
R
and t
F
Mismatch 500 ps
T4.5.2 100 Mb/s TD± Transmit Jitter 1.4 ns
TD±
T4.5.1
T4.5.1
T4.5.1
T4.5.1
+1 rise
+1 fall
-1 fall
-1 rise
TD±
eye pattern
T4.5.2
T4.5.2
90%
10%
10%
90%