FCM-8520/8521-3 1000BASE-T GBIC Product Specification
F i n i s a r
High-Speed Electrical
Interface,
Transmission Line-GBIC
Parameter
Line Frequency
Tx Output Impedance
Notes/Conditions
5-level encoding, per
IEEE 802.3ab.
Z
out,TX
100
Ohm Differential, for all
frequencies between
1MHz and 125MHz.
Z
in,RX
100
Ohm Differential, for all
frequencies between
1MHz and 125MHz.
Table 4. High-speed electrical interface, transmission line-GBIC
Symbol
f
L
Min
Typ
125
Max
Units
MHz
Rx Input Impedance
IV. High-Speed Electrical Interface
All high-speed signals are AC-coupled internally.
High-Speed Electrical Interface,
Host-GBIC
Parameter
Differential Input
Voltage
Differential Output
Voltage
Rise/Fall Time
Tx Input Impedance
Rx Output Impedance
Symbol
V
indiff
V
outdiff
T
r
,T
f
Z
in
Z
out
Min
0.50
0.37
250
75
75
Typ
Max
2.00
2.00
Units
V
V
psec
Ohm
Ohm
Notes/Conditions
Differential peak - peak
Differential peak - peak
20%-80% Differential
Table 5. High-speed electrical interface, host-GBIC
V.
General Specifications
General
Parameter
Data Rate
Cable Length
Symbol Min
BR
L
Units Notes/Conditions
Gb/sec IEEE 802.3 compatible.
See Notes 1 and 2 below.
100
m
Category 5 UTP. BER <10
-10
Table 6. General specifications
Typ
Max
1.25
Notes:
1.
Clock tolerance is
±50
ppm
2.
The FCM-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, Feb 2003
Page 4
FINISAR [ FINISAR CORPORATION. ]
