Overview

GSFP-LX-20KM

The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps and 20KM transmission distance with SMF.The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.The transceivers are compatible with SFP Multi-Source Agreement (MSA). For further information, please refer to SFP MSA.

  Application

  • Gigabit Ethernet
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems

   Features

  • Dual data-rate of 1.25Gbps operation
  • 1310nm FP laser and PIN photo detector for 20km transmission
  • Digital Diagnostic Monitoring
  • Internal Calibration or External Calibration
  • Compatible with RoHS

+3.3V single power supply

  • Operating case temperature:
  • Standard : 0 to +70°C
  • Industrial : -40°C to +85°C
  • Compliant with SFP MSA

Specification

Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Supply Voltage

Vcc

0

+3.6

V

Storage Temperature

Tst

-40

+85

ºC

Operating

Relative Humidity

Rh

5

95

%

Operation Environment

Parameter

Symbol

Min

Typical

Max

Units

Supply Voltage

Vcc

3.15

3.3

3.45

V

Operating Case Temperatur

e

Commercial

Tc

0

70

ºC

Industrial

-40

85

Power Dissipation

1

W

Data Rate

1.25

Gbps

Optical Characteristics

(Ambient Operating Temperature 0C to +70C, Vcc =3.3 V)

Parameter

Symbol

Min

Typ.

Max

Units

Transmitter Section

Center

Wavelength

Ʌo

1260

1310

1360

nm

Spectral

Width(RMS)

ΔɅ

4

nm

Average Output

Power

Po

-8

-3

dBm

Extinction Ratio

Er

10

15

dB

Rise/Fall

Time(20%~80%)

Tr/Tf

0.26

ns

Total Jitter

Tj

0.43

UI

Optical Eye

Diagram

IEEE 802.3z and ANSI Fiber Channel Compatible

Receiver Section

Center

Ʌo

1260

1620

nm

Wavelength

Receiver

Sensitivity

Rsen

-24

dBm

Receiver Overload

Rov

-3

dBm

Return Loss

12

dB

LOS Assert

LOSa

-36

dBm

LOS Dessert

LOSd

-24

dBm

LOS Hysteresis

0.5

5

Electrical Characteristics

(Ambient Operating Temperature 0C to +70C, Vcc =3.3 V)

Parameter

Symbol

Min

Typ.

Max

Units

Transmitter Section

Input Differential

Impedance

Zin

90

100

110

Ohm

Data Input Swing

Differential

Vin

500

2400

mV

TX Disable

Disable

2

Vcc

V

Enable

0

0.8

V

TX Fault

Assert

2

Vcc

V

Deassert

0

0.8

V

Receiver Section

Output differential

impendence

Zout

100

Ohm

Data Input Swing

Differential

Vout

370

2000

mV

RX_LOS

Assert

2

Vcc

V

Deassert

0

0.8

V

EEPROM Information

Addr

Field Size

Name of Field

HEX

Description

0

1

Identifier

3

SFP

1

1

Ext. Identifier

4

MOD4

2

1

Connector

7

LC

3-10

8

Transceiver

00 00 00 02 12 00 0D 01

Transmitter

code

11

1

Encoding

1

8B10B

12

1

BR, nominal

0D

1250M bps

13

1

Reserved

00

14

1

Length (9um)-km

0A/14

20km

15

1

Length(9um)

64/C8/FF

16

1

Length(50um)

37

550m

17

1

Length(62.5um)

37

550m

18

1

Length(copper)

00

19

1

Reserved

00

20-35

16

Vendor name

57 49 4E 54 4F 50 20 20

20 20 20  20 20 20 20 20

Techroutes

36

1

Reserved

00

37-39

3

Vendor OUI

00 00 00

40-55

16

Vendor PN

xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx

ASC II

56-59

4

Vendor rev

31 2E 30 20

V1.0

60-61

2

Wavelength

05 1E

1310nm

62

1

Reserved

00

63

1

CC BASE

XX

Check sum of byte 0~62

64-65

2

Options

00 1A

LOS,TX_Disable, TX_Fault

66

1

BR,max

32

50%

67

1

BR,min

32

50%

68-83

16

Vendor SN

00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

Unspecified

84-91

8

Vendor date code

XX XX XX 20

Year,Month,Day

92-94

3

Reserved

00

95

1

CC_EXT

XX

Check sum of byte 64~94

96-255

160

Vendor specific

Pin Description

Pins

Name

Description

NOTE

1

Veet

Transmitter Ground

2

Tx Fault

Transmitter Fault Indication

1

3

Tx Disable

Transmitter Disable

2

4

MOD DEF 2

Module Defination 2

3

5

MOD DEF 1

Module Defination 1

3

6

MOD DEF 0

Module Defination 0

3

7

Rate Select

Not connected

8

LOS

Loss of signal

4

9

VeeR

Receiver Ground

10

VeeR

Receiver Ground

11

VeeR

Receiver Ground

12

RD-

Inv. Received Data Output

5

13

RD+

Ireceived Data Output

5

14

VeeR

Receiver Ground

15

VccR

Receiver Power

16

VccT

Transmitter Power

17

VeeT

Transmitter Ground

18

TD+

Tranmitter Data Input

6

19

TD-

Inv.Transmit Data Input

6

20

Veet

Transmitter Ground