Finisar Computer Accessories FCLF 8521 3 User Manual

F i n i s a r  
Product Specification  
1000BASE-T Copper SFP Transceiver  
FCLF-8520/8521-3  
Product Features  
Up to 1.25Gb/s bi-directional data links  
Hot-pluggable SFP footprint  
Extended case temperature  
range (0°C to +85°C )  
Fully metallic enclosure for low EMI  
Low power dissipation (1.05 W typical)  
Compact RJ-45 connector assembly  
RoHS compliant and Lead Free  
Applications  
Access to physical layer IC via 2-wire  
serial bus  
1.25 Gigabit Ethernet over Cat  
5 cable  
10/100/1000 BASE-T operation in host  
systems with SGMII interface  
Finisar’s FCLF-8520/8521-3 1000BASE-T Copper Small Form Pluggable (SFP)  
transceivers are based on the SFP Multi Source Agreement (MSA)1. They are compatible  
with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE Std 802.32.  
The 1000BASE-T physical layer IC (PHY) can be accessed via I2C, allowing access to  
all PHY settings and features.  
The FCLF-8520-3 uses the SFP’s RX_LOS pin for link indication, and 1000BASE-X  
auto-negotiation should be disabled on the host system. The FCLF-8521-3 is compatible  
with 1000BASE-X auto-negotiation, but does not have a link indication feature  
(RX_LOS is internally grounded). See AN-2036, “Frequently Asked Questions  
Regarding Finisar’s 1000BASE-T SFPs”, for a more complete explanation on the  
differences between the two models and details on applications issues for the products.  
PRODUCT SELECTION  
Part Number  
Link Indicator on RX_LOS Pin  
1000BASE-X auto-negotiation  
enabled by default  
FCLF-8520-3  
FCLF-8521-3  
Yes  
No  
No  
Yes  
© Finisar Corporation December 16, 2005 RevB  
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FCLF-8520/8521-3 1000BASE-T SFP Product Specification  
F i n i s a r  
II. +3.3V Volt Electrical Power Interface  
The FCLF-8520/8521-3 has an input voltage range of 3.3 V +/- 5%. The 4 V maximum  
voltage is not allowed for continuous operation.  
+3.3 Volt Electrical Power  
Interface  
Parameter  
Supply Current  
Symbol  
Min  
Typ  
320  
Max  
375  
Units Notes/Conditions  
mA 1.2W max power over  
full range of voltage  
Is  
and temperature.  
See caution note below  
Input Voltage  
Vcc  
Vmax  
Isurge  
3.13  
3.3  
3.47  
4
V
V
Referenced to GND  
Maximum Voltage  
Surge Current  
30  
mA Hot plug above steady state  
current. See caution note  
below  
Caution: Power consumption and surge current are higher than the specified values in the SFP MSA  
Table 2. +3.3 Volt electrical power interface  
III. Low-Speed Signals  
MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA), are open drain CMOS signals (see  
section VII, “Serial Communication Protocol”). Both MOD_DEF(1) and MOD_DEF(2)  
must be pulled up to host_Vcc.  
Low-Speed Signals,  
Electronic Characteristics  
Parameter  
Symbol  
Min  
Max  
Units Notes/Conditions  
SFP Output LOW  
VOL  
0
0.5  
V
4.7k to 10k pull-up to host_Vcc,  
measured at host side of connector  
SFP Output HIGH  
SFP Input LOW  
VOH  
VIL  
host_Vcc - 0.5 host_Vcc + 0.3  
V
V
4.7k to 10k pull-up to host_Vcc,  
measured at host side of connector  
4.7k to 10k pull-up to Vcc,  
0
2
0.8  
measured at SFP side of connector  
SFP Input HIGH  
VIH  
Vcc + 0.3  
V
4.7k to 10k pull-up to Vcc,  
measured at SFP side of connector  
Table 3. Low-speed signals, electronic characteristics  
© Finisar Corporation December 16, 2005 RevB  
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FCLF-8520/8521-3 1000BASE-T SFP Product Specification  
F i n i s a r  
IV. High-Speed Electrical Interface  
All high-speed signals are AC-coupled internally.  
High-Speed Electrical  
Interface,  
Transmission Line-SFP  
Parameter  
Line Frequency  
Symbol  
Min  
Typ  
125  
Max  
Units Notes/Conditions  
MHz 5-level encoding, per  
IEEE 802.3  
fL  
Tx Output Impedance  
Rx Input Impedance  
Zout,TX  
100  
100  
Ohm Differential, for all  
frequencies between  
1MHz and 125MHz  
Zin,RX  
Ohm Differential, for all  
frequencies between  
1MHz and 125MHz  
Table 4. High-speed electrical interface, transmission line-SFP  
High-Speed Electrical Interface,  
Host-SFP  
Parameter  
Symbol  
Min  
Typ Max  
Units  
Notes/Conditions  
Single ended data input  
swing  
Vinsing  
250  
1200  
mV  
Single ended  
Single ended data output  
swing  
Voutsing  
350  
800  
mV  
Single ended  
Rise/Fall Time  
Tx Input Impedance  
Tr,Tf  
Zin  
175  
50  
psec  
Ohm  
20%-80%  
Single ended  
Rx Output Impedance  
Zout  
50  
Ohm  
Single ended  
Table 5. High-speed electrical interface, host-SFP  
© Finisar Corporation December 16, 2005 RevB  
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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  
Top  
Min  
0
Typ  
Max  
85  
Units Notes/Conditions  
°C  
°C  
Case 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 December 16, 2005 RevB  
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FCLF-8520/8521-3 1000BASE-T SFP Product Specification  
F i n i s a r  
Serial Bus Timing  
Requirements  
Parameter  
Symbol Min Typ  
Max  
100,000  
Units Notes/Conditions  
Hz  
I2C Clock Rate  
0
Table 8. Serial bus timing requirements  
VIII. Mechanical Specifications  
The host-side of the FCLF-8520/8521-3 conforms to the mechanical specifications  
outlined in the SFP MSA1. The front portion of the SFP (part extending beyond the face  
plate of the host) is larger to accommodate the RJ-45 connector. See Figure 2 below for  
details.  
Figure 2. FCLF-8520/8521-3 mechanical dimensions  
© Finisar Corporation December 16, 2005 RevB  
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FCLF-8520/8521-3 1000BASE-T SFP Product Specification  
F i n i s a r  
IX. References  
1. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA),  
September 2000. Documentation is currently available at Finisar upon request.  
2. IEEE Std 802.3, 2002 Edition. IEEE Standards Department, 2002.  
4. “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM”, Atmel Corporation.  
5. “Alaska Ultra 88E1111 Integrated 10/100/1000 Gigabit Ethernet Transceiver”,  
Marvell Corporation. www.marvell.com  
X.  
For More Information  
Finisar Corporation  
1389 Moffett Park Drive  
Sunnyvale, CA 94089-1133  
Tel. 1-408-548-1000  
Fax 1-408-541-6138  
© Finisar Corporation December 16, 2005 RevB  
Page 7  
 

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