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

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

IV. High-Speed Electrical Interface

All high-speed signals are AC-coupled internally.

High-Speed Electrical
Interface,
Transmission Line-SFP

Parameter Symbol Min Typ Max Units Notes/Conditions

Line Frequency f

L

125 MHz 5-level encoding, per

IEEE 802.3

Tx Output Impedance Z

out,TX

100 Ohm Differential, for all

frequencies between
1MHz and 125MHz

Rx Input Impedance Z

in,RX

100 Ohm Differential, for all

frequencies between
1MHz and 125MHz

Table 4. High-speed electrical interface, transmission line-SFP

High-Speed Electrical Interface,
Host-SFP

Parameter Symbol Min Typ Max Units Notes/Conditions

Single ended data input
swing
Single ended data output
swing
Rise/Fall Time Tr,T

Tx Input Impedance Z
Rx Output Impedance Z

V

V

insing

outsing

f

in

out

250 1200 mV Single ended

350 800 mV Single ended

175 psec 20%-80%
50 Ohm Single ended

50 Ohm Single ended

Table 5. High-speed electrical interface, host-SFP

© Finisar Corporation December 16, 2005 RevB Page 4

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

V. General Specifications

General

Parameter Symbol Min Typ Max Units Notes/Conditions

Data Rate BR 10 1,000 Mb/sec IEEE 802.3 compatible.

Cable Length L 100 m Category 5 UTP. BER <10

Table 6. General specifications

See Notes 2 through 4 below

-12

Notes:

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.

Environmental
Specifications

Parameter Symbol Min Typ Max Units Notes/Conditions

Operating Temperature T
Storage Temperature T

op

sto

0 85 °C Case temperature

-40 85 °C Ambient temperature

Table 7. Environmental specifications

VII. Serial Communication Protocol

All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP
MSA1. These SFPs use an Atmel AT24C01A 128 byte E2PROM with an address of A0h.
For details on interfacing with the E2PROM, 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

4

“Alaska Ultra 88E1111 Integrated Gigabit Ethernet Transceiver”

(Marvell document

number MV-S100649-00).

© Finisar Corporation December 16, 2005 RevB Page 5

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

Serial Bus Timing
Requirements

Parameter Symbol Min Typ Max Units Notes/Conditions

I2C Clock Rate

0 100,000 Hz

Table 8. Serial bus timing requirements

VIII. Mechanical Specifications

The host-side of the FCLF-8520/8521-3 conforms to the mechanical specifications
outlined in the SFP MSA1. The front portion of the SFP (part extending beyond the face
plate of the host) is larger to accommodate the RJ-45 connector. See Figure 2 below for
details.

Figure 2. FCLF-8520/8521-3 mechanical dimensions

© Finisar Corporation December 16, 2005 RevB Page 6

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

IX. References

1. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA),
September 2000. Documentation is currently available at Finisar upon request.

2. IEEE Std 802.3, 2002 Edition. IEEE Standards Department, 2002.

4. “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM”, Atmel Corporation.

www.Atmel.com

5. “Alaska Ultra 88E1111 Integrated 10/100/1000 Gigabit Ethernet Transceiver”,
Marvell Corporation. www.marvell.com

X. For More Information

Finisar Corporation
1389 Moffett Park Drive
Sunnyvale, CA 94089-1133
Tel. [phone]
Fax [phone]

[e-mail]
www.finisar.com

© Finisar Corporation December 16, 2005 RevB Page 7