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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)

. They are compatible

with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE Std 802.3

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

1 2 3 4 5 6 7

Finisar 1

Inhaltsverzeichnis

Seite 1 - Finisar

Finisar Product Specification 1000BASE-T Copper SFP Transceiver FCLF-8520/8521-3 Product Features • Up to 1.25Gb/s bi-directional data links • Ho

Seite 2

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar I. SFP to Host Connector Pin Out Pin Symbol Name/Description Note 1 VEETTransmit

Seite 3

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar II. +3.3V Volt Electrical Power Interface The FCLF-8520/8521-3 has an input voltage

Seite 4

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar IV. High-Speed Electrical Interface All high-speed signals are AC-coupled interna

Seite 5

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar V. General Specifications Notes: General Parameter Symbol Min Typ Max Units Not

Seite 6

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar Serial Bus Timing Requirements Parameter Symbol Min Typ Max Units Notes/Condition

Seite 7

FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar IX. References 1. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agree

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Inhaltsverzeichnis

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