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FCLF-8520/8521-3 1000BASE-T SFP Product Specification
F i n i s a r
V.
General Specifications
General
Parameter
Symbol
Min
Typ
Max
Units Notes/Conditions
Data Rate
BR
10
1,000 Mb/sec IEEE 802.3 compatible.
See Notes 2 through 4 below
Cable Length
L
100
m
Category 5 UTP. BER <10 -12
Table 6. General specifications
Notes:
1. Clock tolerance is +/- 50 ppm
2. By default, the FCLF-8520/8521-3 is a full duplex device in preferred master mode
3. Automatic crossover detection is enabled. External crossover cable is not required
4. 10/100/1000 BASE-T operation requires the host system to have an SGMII interface
with no clocks, and the module PHY to be configured per Application Note AN-2036.
With a SERDES that does not support SGMII, the module will operate at 1000BASE-T
only.
VI. Environmental Specifications
The FCLF-8520/8521-3 has an extended range from 0°C to +85°C case temperature as
specified in Table 8.
Environmental
Specifications
Parameter
Operating Temperature
Storage Temperature
Symbol
T op
T sto
Min
0
-40
Typ
Max
85
85
Units
°C
°C
Notes/Conditions
Case temperature
Ambient temperature
Table 7. Environmental specifications
VII. Serial Communication Protocol
All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP
MSA 1 . These SFPs 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.” 3
The 1000BASE-T physical layer IC can also be accessed via the 2-wire serial bus at
address ACh. For details interfacing with the PHY IC, see Marvell data sheet titled
“Alaska Ultra 88E1111 Integrated Gigabit Ethernet Transceiver” 4 (Marvell document
number MV-S100649-00).
? Finisar Corporation December 16, 2005 RevB
Page 5
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