fcm-8521-3 Finisar Corporation., fcm-8521-3 Datasheet - Page 4

• Manufacturer Part Number: fcm-8521-3
• Description: 1000base-t Copper Gbic Transceivers
• Manufacturer: Finisar Corporation.

High-Speed Electrical
Interface,
Transmission Line-GBIC
Parameter
Line Frequency
Tx Output Impedance
Rx Input Impedance
FCM-8520/8521-3 1000BASE-T GBIC Product Specification
IV. High-Speed Electrical Interface
All high-speed signals are AC-coupled internally.
V.
Notes:
1.
2.
3.
 Finisar Corporation
Rev A, Feb 2003
High-Speed Electrical Interface,
Host-GBIC
Parameter
Differential Input
Voltage
Differential Output
Voltage
Rise/Fall Time
Tx Input Impedance
Rx Output Impedance
General
Parameter
Data Rate
Cable Length
General Specifications
Clock tolerance is ±50 ppm
The FCM-8520/8521-3 is a full-duplex device in the “Preferred Master”
Automatic crossover detection is enabled. External crossover cable is not required
Table 4. High-speed electrical interface, transmission line-GBIC
Symbol Min
Symbol
V
BR
V
Table 5. High-speed electrical interface, host-GBIC
T
L
Z
Z
outdiff
indiff
r
,T
out
in
Symbol
f
Z
Z
out,TX
in,RX
f
Table 6. General specifications
L
Min
0.50
0.37
Typ
Min
Typ
250
75
75
Max
1.25
100
Typ
125
100
100
Max
2.00
2.00
Gb/sec IEEE 802.3 compatible.
Units Notes/Conditions
m
Max
Units
Ohm
Ohm
psec
V
V
See Notes 1 and 2 below.
Category 5 UTP. BER <10
Units Notes/Conditions
MHz
Ohm
Ohm
Notes/Conditions
Differential peak - peak
Differential peak - peak
20%-80% Differential
F i n i s a r
5-level encoding, per
IEEE 802.3ab.
Differential, for all
frequencies between
1MHz and 125MHz.
Differential, for all
frequencies between
1MHz and 125MHz.
mode.
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