VSC7185TW 查看數據表（PDF） - Vitesse Semiconductor
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VSC7185TW Datasheet PDF : 18 Pages
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VITESSE
SEMICONDUCTOR CORPORATION
Quad Transceiver for
Gigabit Ethernet and Fibre Channel
Preliminary Data Sheet
VSC7185
Figure 5: RFCT and TC Waveforms
TLTC
THTC
TC
VRFT
RFCT
TLRF
THRF
1.4V
RFCO
TP
Table 4: Reference Clock Requirements
Parameters
Description
FR
Frequency Range
FO
Frequency Offset
TP
TLRO/THRO
TRRO/TFRO
TLTC/THTC
TLRF/THRF
TRTC,TFTC
TRRF,TFRF
Delay from RFCT to RFCO
RFCO Duty Cycle
RFCO Rise and Fall Time
TC Duty Cycle
RFCT Duty Cycle
TC Rise and Fall Time
RFCT Rise and Fall Time
Min
105
–200
TBD
35
0.25
35
35
—
—
Max
136
200
TBD
65
1.5
65
65
0.45
1.5
Units
MHz
ppm
ns
%
ns
%
%
ns
ns
Conditions
Range over which both transmit and
receive reference clocks on any link may
be centered (RFCM = 1).
Maximum frequency offset between
transmit and receive reference clocks on
one link.
Between VRFT +180mV.
Measured at VRFT
Measured at 1.4V
Between VRFT +180mV
Between VRFT +180mV
Page 8
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52324-0, Rev. 3.0
8/28/00
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