Finisar FCLF-8521-3 User Manual

Finisar

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

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 802.3
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

FCLF-8520-3 Yes No
FCLF-8521-3 No Yes

Applications

• 1.25 Gigabit Ethernet over Cat

5 cable

enabled by default

2

.

© Finisar Corporation December 16, 2005 RevB Page 1

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

I. SFP to Host Connector Pin Out

Pin Symbol Name/Description Note

1 V
2 T
3 T

EET

FAULT

DIS

4 MOD_DEF(2) Module Definition 2. Data line for serial ID 3 5 MOD_DEF(1) Module Definition 1. Clock line for serial ID 3 6 MOD_DEF(0) Module Definition 0. Grounded wi t hin t he module 3 7 Rate Select No connection required 8 LOS Loss of Signal indication. 4

9 V
10 V
11 V
12 RD-

EER
EER
EER

13 RD+ Receiver Non-inverted DATA out. AC coupled
14 V
15 V
16 V
17 V

EER
CCR
CCT
EET

18 TD+ Transmitter Non-Inverted DATA in. AC coupled
19 TD­20 V

EET

Notes: 1. Circuit ground is connected to chassis ground

2. PHY disabled on T

3. Should be pulled up with 4.7k – 10k Ohms on host board to a voltage between 2.0 V and 3.6 V.
MOD_DEF(0) pulls line low to indicate module is plugged in.

4. LVTTL compatible with a maximum voltage of 2.5V. Not supported on FCLF-8521-3.

Table 1. SFP to host connector pin assignments and descriptions

Transmitter ground (common with receiver ground) 1
Transmitter Fault. Not supported
Transmitter Disable. PHY disabled on high or open 2

Receiver ground (common with transmitter ground) 1
Receiver ground (common with transmitter ground) 1
Receiver ground (common with transmitter ground) 1
Receiver Inverted DATA out. AC coupled

Receiver ground (common with transmitter ground) 1
Receiver power supply
Transmitter power supply
Transmitter ground (common with receiver ground) 1

Transmitter Inverted DATA in. AC coupled
Transmitter ground (common with receiver ground) 1

> 2.0V or open, enabled on T

DIS

< 0.8V

DIS

Towards

Bezel

1

2

3

4

5

6

7

8

9

10

VeeT

TXFault

TX Disable

MOD-DEF(2)

MOD-DEF(1)

MOD-DEF(0)

Rate Select

LOS

VeeR

VeeR

VeeT

TD-

TD+

VeeT

VccT

VccR

VeeR

RD+

RD-

VeeR

20

19

18

17

16

15

14

13

12

11

Towards

ASIC

Figure 1. Diagram of host board connector block pin numbers and names

© Finisar Corporation December 16, 2005 RevB Page 2

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

p

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 Symbol Min Typ Max Units Notes/Conditions

Supply Current I

Input Voltage V

s

cc

320 375 mA 1.2W max power over

full range of voltage
and temperature.
See caution note below

3.13 3.3 3.47 V Referenced to GND
Maximum Voltage V
Surge Current I

Caution: Power consumption and surge current are higher than the specified values in the SFP MSA

max

surge

Table 2. +3.3 Volt electrical

4 V
30 mA Hot plug above steady state

current. See caution note
below

ower 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 V

SFP Output HIGH V

SFP Input LOW V

SFP Input HIGH V

OL

OH

IL

IH

Table 3. Low-speed signals, electronic characteristics

0 0.5 V 4.7k to 10k pull-up to host_Vcc,

measured at host side of connector

host_Vcc - 0.5 host_Vcc + 0.3 V 4.7k to 10k pull-up to host_Vcc,

measured at host side of connector

0 0.8 V 4.7k to 10k pull-up to Vcc,

measured at SFP side of connector

2 Vcc + 0.3 V 4.7k to 10k pull-up to Vcc,

measured at SFP side of connector

© Finisar Corporation December 16, 2005 RevB Page 3