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Finisar
Product Specification
1000BASE-T RoHS Compliant Copper SFP Transceiver
FCLF8520P2BTL / FCLF8521P2BTL / FCLF8522P2BTL
Product Features
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Up to 1.25Gb/s bi-directional data links
Hot-pluggable SFP footprint
Extended case temperature range
(-40°C to +85°C )
Fully metallic enclosure for low EMI
RoHS compliant and Lead Free
Low power dissipation (1.05 W typical)
Compact RJ-45 connector assembly
Access to physical layer IC via 2-wire
serial bus
Applications
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10/100/1000 BASE-T operation in host
systems with SGMII interface
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1.25 Gigabit Ethernet over Cat
5 cable
Finisar’s FCLF8520P2BTL, FCLF8521P2BTL and FCLF8522P2BTL 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
802.3 2 . They are RoHS compliant and lead-free per Directive 2002/95/EC 3 and Finisar Application
Note AN-2038. The 1000BASE-T physical layer IC (PHY) can be accessed via I2C, allowing
access to all PHY settings and features.
The FCLF8520P2BTL uses the SFP’s RX_LOS pin for link indication, and 1000BASE-X auto-
negotiation should be disabled on the host system. The FCLF8521P2BTL 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. The FCLF8522 shall support both RX_LOS pin for link
indication and 1000BASE-X auto-negotiation.
PRODUCT SELECTION
Part Number
FCLF8520P2BTL
FCLF8521P2BTL
FCLF8522P2BTL
Link Indicator on RX_LOS Pin
Yes
No
Yes
1000BASE-X auto-negotiation enabled by default
No
Yes
Yes
? Finisar Corporation May 18, 2010 Rev B.2
Page 1
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