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FCL-8520-3

P1-P3P4-P6P7-P7
FCL-8520/8521-3 1000BASE-T GBIC Product Specification Finisar
High-Speed Electrical
Interface,
Transmission Line-GBIC
Parameter Symbol Min Typ Max Units Notes/Conditions
Line Frequency f
L
125 MHz 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.
V. General Specifications
High-Speed Electrical Interface,
Host-GBIC
Parameter Symbol Min Typ Max Units Notes/Conditions
Differential Input
Voltage
V
indiff
0.50 2.00 V Differential peak - peak
Differential Output
Voltage
V
outdiff
0.37 2.00 V Differential peak - peak
Rise/Fall Time T
r
,T
f
250 psec 20%-80% Differential
Tx Input Impedance Z
in
75 Ohm
Rx Output Impedance Z
out
75 Ohm
Table 5. High-speed electrical interface, host-GBIC
Notes:
General
Parameter Symbol Min Typ Max Units Notes/Conditions
Data Rate BR 1.25 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
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 Page 4
Rev A, February 2006
FCL-8520/8521-3 1000BASE-T GBIC Product Specification Finisar
VI. Environmental Specifications
The FCL-8520/8521-3 has an extended range from 0°C to +75°C case temperature as
specified in Table 8.
Environmental
Specifications
Parameter Symbol Min Typ Max Units Notes/Conditions
Operating Temperature T
op
0 75 °C Case temperature
Storage Temperature T
sto
-40 85 °C Ambient temperature
Table 7. Environmental specifications
VII. Serial Communication Protocol
All Finisar GBICs are ‘Module Definition “4”’ and support the 2-wire serial
communication protocol outlined in the GBIC Specification
1
. These GBICs use an Atmel
AT24C01A 128 byte E
2
PROM with an address of A0h. For details on interfacing with
the E
2
PROM, see the Atmel data sheet titled “AT24C01A/02/04/08/16 2-Wire Serial
CMOS E
2
PROM.”
5
The 1000BASE-T physical layer IC can also be accessed via the 2-wire serial bus at
address A4h. For details interfacing with the PHY IC, see Marvell data sheet titled
“Alaska Ultra 88E1011/88E1001S Integrated Gigabit Ethernet Transceiver”
6
(Marvell
document number MV-5100281-00).
Serial Bus Timing
Requirements
Parameter Symbol Min Typ Max Units Notes/Conditions
I
2
C Clock Rate
0 100,000 Hz
Table 8. Serial bus timing requirements
© Finisar Corporation Page 5
Rev A, February 2006
FCL-8520/8521-3 1000BASE-T GBIC Product Specification Finisar
VIII. Mechanical Specifications
The host-side of the FCL-8520/8521-3 conforms to the mechanical specifications
outlined in the GBIC Specification Revision 5.5, Section 6
1
. The front portion of the
GBIC (part extending beyond the face plate of the host) is larger to accommodate the RJ-
45 connector. See Figure 1 below for details.
Figure 1. FCL-8520/8521-3 mechanical dimensions
© Finisar Corporation Page 6
Rev A, February 2006
P1-P3P4-P6P7-P7

FCL-8520-3

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Manufacturer:
Finisar Corporation
Description:
COPPER GBIC TXRX 1.25GB/S
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