QT2022/32 - Data Sheet: DS3051
Figure 46: XAUI Driver Far End Template
+800
Differential
Amplitude
mVpp
+100
0
-100
-800
1-X1=0.825
1-X2=0.61
X1=0.175
X2=0.39
Time in UI
Table 68: XAUI Driver Characteristics
Parameter
Description
BAUD Rate
Min
Typ
3.125
Max
Units
Conditions
Gb/s
For 10GE, where fEREF = 156.25 MHz
For 10GFC, where fEREF = 159.375 MHz
4.53kΩ @ RxXLEVEL (module application)
16.9kΩ @ RxXLEVEL (XFP application)
See Note 3.
3.1875
1000
300
Differential Eye Height
(opening)
See Note 1.
870
40
mVpp
mVpp
Transition times
100
0.35
0.17
15
ps
UI
UI
ps
20%-80%. See Note 4.
no pre-equalization
no pre-equalization
Total Output jitter, TJ
Output Deterministic jitter, DJ
Output differential skew
measured from the crossings of the eyes
for P vs. N outputs
Differential output impedance
100
DC
Ω
|S22D|
|S22D|
Differential output return loss
(referred to 100Ω)
10
dB
312.5 to 625 MHz
Differential output return loss
see eqn
dB
625MHz to 3.125GHz
(referred to 100Ω)
in Note 2
Note 1. Output level set by RxXLEVEL external resistor. For 10GE module application, amplitude will meet the XAUI near-end template
specified in IEEE 802.3. For XFP line card application, output level can be adjusted down to 300mVpp differential for minimum power.
Note 2. For 625MHz < freq < 3.125GHz, S22D = -10 + 10log(freq/625) dB
194
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