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4.25Gbps SFP Transceiver 1550nm 40km Reach

Features

  • Single 3.3 V supply
  • Supports 1.0625/2.125/4.25Gb/s Fiber Channel Operation
  • Gigabit Ethernet compatible
  • 1550nm DFB Laser
  • SFP MSA SFF-8074i compliant
  • Digital Diagnostic SFF-8472 compliant
  • Compatible with RoHS
  • Operating case temperature:
    1. Standard: 0 to +70°C Industrial: -40 to +85°C

Applications

  • Tri Rate 1.0625 / 2.125 / 4.25Gbp/s Fiber Channel
  • 1.25Gbp/s 1000Base-LX Ethernet and 1000Base-LX10 (Rate selectable version)
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4.25Gbps SFP Optical Transceiver, 40km Reach  

                                                                                                                                  

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

Data Rate

   

4.25

 

Gb/S

 

Centre Wavelength

λc

1510

1550

1590

nm

 

Spectral Width(-20dB)

∆λ

   

1

nm

 

Side Mode Suppression Ratio

SMSR

30

   

dB

 

Average Output Power(BOL)

Pout

0

 

5

dBm

1

Extinction Ratio

ER

5

   

dB

 

Average Launch Power-OFF

Transmitter

Pout

   

-40

dBm

 

Optical Eye Diagram

Fiber Channel Compliant

Optical Rise/Fall Time(20%~80%)

tr/tf

   

130

ns

 

Data Input Swing Differential

VIN

200

 

2400

mV

2

Input Differential Impedance

ZIN

90

100

120

Ω

 

TX Disable

Disable

 

2.0

 

Vcc

V

 

Enable

 

0

 

0.8

V

 

TX Fault

Fault

 

2.0

 

Vcc

V

 

Normal

 

0

 

0.8

V

 

Receiver

Centre Wavelength

λc

1470

 

1610

nm

 

Receiver Sensitivity(BOL)

Sen

   

-18

dBm

3

LOS De-Assert

LOSD

   

-18

dBm

 

LOS Assert

LOSA

-28

   

dBm

 

LOS Hysteresis

 

0.5

 

6

dB

 

Receiver Reflectance

     

-20

dB

 

Data Output Swing Differential

Vout

350

 

1800

mV

4

Loss of Signal(LOS) AssertTime

TAssert

   

500

nS

 

Loss of Signal(LOS) Dessert Time

TDeassert

   

500

nS

 

LOS

High

2.0

 

Vcc

V

 

Low

   

0.8

V

 

 

Pin Descriptions

 

Plug Seq.: Pin engagement sequence during hot plugging.

 

1) TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.

 

2) TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7k~10kΩ resistor. Its states are:

 

Low (0 to 0.8V): Transmitter on

(>0.8V, < 2.0V): Undefined

 

High (2.0 to 3.465V): Transmitter Disabled

Open: Transmitter Disabled

 

3) Mod-Def. 0, 1, 2. These are the module definition pins. They should be pulled up with a 4.7k~10kΩ resistor on the host board.

The pull-up voltage shall be VccT or VccR.

Mod-Def. 0 is grounded by the module to indicate that the module is present

 

Mod-Def. 1 is the clock line of two wire serial interface for serial ID

Mod-Def. 2 is the data line of two wire serial interface for serial ID

 

4) LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.

 

5) RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.

 

6) TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.

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