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FCL-8520/8521-3 1000BASE-T GBIC Product Specification
High-Speed Electrical
Interface,
Transmission Line-GBIC
F i n i s a r
Parameter
Line Frequency
Symbol
f L
Min
Typ
125
Max
Units
MHz
Notes/Conditions
5-level encoding, per
IEEE 802.3ab.
Tx Output Impedance
Z out,TX
100
Ohm
Differential, for all
frequencies between
1MHz and 125MHz.
Rx Input Impedance
Z in,RX
100
Ohm
Differential, for all
frequencies between
1MHz and 125MHz.
Table 4. High-speed electrical interface, transmission line-GBIC
IV. High-Speed Electrical Interface
All high-speed signals are AC-coupled internally.
High-Speed Electrical Interface,
Host-GBIC
Parameter
Differential Input
Symbol
V indiff
Min
0.50
Typ
Max
2.00
Units
V
Notes/Conditions
Differential peak - peak
Voltage
Differential Output
V outdiff
0.37
2.00
V
Differential peak - peak
Voltage
Rise/Fall Time
Tx Input Impedance
Rx Output Impedance
T r ,T f
Z in
Z out
250
75
75
psec
Ohm
Ohm
20%-80% Differential
Table 5. High-speed electrical interface, host-GBIC
V.
General Specifications
General
Parameter
Data Rate
Symbol Min
BR
Typ
Max
1.25
Units Notes/Conditions
Gb/sec IEEE 802.3 compatible.
See Notes 1 and 2 below.
Cable Length
L
100
m
Category 5 UTP. BER <10 -10
Table 6. General specifications
Notes:
1. Clock tolerance is ± 50 ppm
2. The FCL-8520/8521-3 is a full-duplex device in the “Preferred Master” mode .
3. Automatic crossover detection is enabled. External crossover cable is not required
? Finisar Corporation
Rev A, February 2006
Page 4
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