Realtek RTL8169 Manual page 71

PCI Clock Specification
0.5Vcc
0.4Vcc
0.3Vcc
CLK (@ Device #1)
CLK (@ Device #2)
Symbol
Tcyc
Thigh
Tlow
--
--
Tskew
2002/03/27
T_high
0.6Vcc
V_ih
T_skew
V_il
T_skew
Parameter
CLK Cycle Time
CLK High Time
CLK Low Time
CLK Slew Rate
RST# Slew Rate
CLK Skew
Clock and Reset Specifications
T_low
0.2Vcc
T_cyc
3.3V Clock Waveform
T_skew
V_ih
V_il
Clock Skew Diagram
66MHz
Min Max
15 30
6
6
1.5 4
50 -
1
71
V_test
V_test
33MHz
Min Max
30
∞
11
11
1
50
RTL8169
0.4Vcc, peak-to-peak
(minimum)
Units
ns
ns
ns
4 V/ns
- mV/ns
2 ns
Rev.1.21