82575EB Datasheet, PDF (49/62 Pages) Intel Corporation – Intel® 82575EB Gigabit Ethernet Controller Datasheet

Targeted AC Characteristics — Intel^® 82575EB Gigabit Ethernet Controller
6.4 Targeted AC Characteristics
Table 13.
25 MHz Clock Input Requirements
Symbol
Parameter
Min
Typ
Max
Unit
f0
df0
Dc
tr
tf
Jptp
C_in
T
Aptp
Vcm
Frequency
Frequency Variation
Duty Cycle
Rise Time
Fall Time
Clock Jitter (peak-to-peak)¹
Input Capacitance
Operating Temperature
Input clock amplitude (peak-to-peak)
Clock common mode
N/A
25.000
N/A
-50
N/A
+50
40
N/A
60
N/A
N/A
5
N/A
N/A
5
N/A
N/A
250
N/A
20
N/A
N/A
N/A
70
1.0
1.2
1.3
N/A
0.6
N/A
MHz
ppm
%
ns
ns
ps
pF
°C
V
V
1. Clock jitter is defined according to the recommendations of part 40.6.1.2.5 IEEE 1000Base-T Standard (at least 10⁵ clock edges,
filtered by HPF with cut off frequency of 5000 Hz).
Table 14.
Link Interface Clock Requirements
Symbol
fGTX¹
Parameter
GTX_CLK frequency
Min
N/A
Typ
125
1. GTX_CLK is used externally for test purposes only. See signals IEEE_TEST1_p and IEEE_TEST1_n.
Max
N/A
Unit
MHz
317679-004
Revision: 2.11
January 2011
Intel^® 82575EB Gigabit Ethernet Controller
Datasheet
49