VITESSE
SEMICONDUCTOR CORPORATION
10-bit Transceiver for Fibre
Channel and Gigabit Ethernet
Advance Product Information
VSC7133
Figure 6: REFCLK Timing Waveforms
T
L
REFCLKP
REFLKN
T
R
T
H
V
IH(MIN)
V
IL(MAX)
T
F
Table 4: Reference Clock Requirements
Parameter
Description
Min
Max
Units
Conditions
Range over which both transmit and
receive reference clocks on any link
may be centered
Maximum frequency offset between
transmit and receive reference clocks
on one link
Measured at 1.5V
Between V
IL(MAX)
and V
IH(MIN)
FR
Frequency Range
98
136
MHz
FO
DC
T
R
,T
F
Frequency Offset
REFCLK duty cycle
REFCLK rise and fall time
-200
200
ppm.
35
—
65
1.5
%
ns.
Page 8
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VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52187-0 Rev. 2.4
1/17/00
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
