Finisar FCLF-8521-3 Transceiver Module FCLF-8521-3 ユーザーズマニュアル

FCLF-8520/8521-3 1000BASE-T SFP Product Specification 

 

 

Notes:  

 

 

 

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

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.   

 

 

 

 

Operating Temperature 

T

op

0  85 

°C 

Case 

temperature 

Storage Temperature 

T

sto

-40   85 °C 

Ambient 

temperature 

 

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 

 

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