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
•Access to physical layer IC via 2-wire serial bus
•10/100/1000 BASE-T operation in host systems with SGMII interface
Applications
•1.25 Gigabit Ethernet over Cat
5 cable
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 | Yes | No |
FCLF-8521-3 | No | Yes |
♥ Finisar Corporation December 16, 2005 RevB | Page 1 |
