FCMJ-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 FCMJ-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 FCMJ-8520/8521-3 has an extended range from 0°C to +85°C case temperature as
specified in Table 8.
Environmental
Specifications
Parameter
Symbol
Min
Typ
Max
Units Notes/Conditions
Operating Temperature
Top
0
85
°C
°C
Case temperature
Storage Temperature
Tsto
-40
85
Ambient temperature
Table 7. Environmental specifications
VII. Serial Communication Protocol
All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP
MSA1. These SFPs use an Atmel AT24C01A 128 byte E2PROM with an address of A0h.
For details on interfacing with the E2PROM, see the Atmel data sheet titled
“AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM.”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 March 16, 2005 Rev H
Page 5
FINISAR [ FINISAR CORPORATION. ]
