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1.25G,SFP module,SM 1310nm,20KM


1.25G SFP module,1.25G,SM 1310nm,20KM

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1.25G SFP module ,SM,1310NM,20KM

Feature:

l        SFP module package with LC connector 

l        1310nm FP laser and PIN photo detector 

l        550m transmission with MMF  

l        10Km~20Km transmission with SMF 

l        +3.3V single power supply 

l        LVPECL compatible data input/output interface 

l        Low EMI and excellent ESD protection 

l        laser safety standard IEC-60825 compliant 

l        Compatible with RoHS 


Application

  • Ethernet
  • Telecom

 

Description:

The 1.25G SFP module supports dual data-rate of 1.25Gbps/1.0625Gbps and from 10km to 20km transmission distance with SMF or 550m with MMF.

The transceiver consists of two sections: The transmitter section incorporates a FP laser. the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (TIA).

All modules satisfy class I laser safety requirements. The optical output can be disabled by a TTL logic high-level input of Tx Disable.  Tx Fault indicates that degradation of the laser. Loss of signal (LOS) output indicates the loss of an input optical signal of receiver.

1.25G SFP module standard serial ID information compatible with SFP MSA describes the transceiver’s capabilities, standard interfaces, manufacturer and other information. The host equipment can access this information via the 2-wire serial bus. For more information, please refer to SFP Multi-Source Agreement (MSA)

 

Performance specifications:

Absolute Maximum Ratings

Parameter

Symbol

Minimum

Maximum

Units

Storage Temperature

Tst

-40

+85

°C

Operating Temperature

Top

0

+70

°C

Supply Voltage

Vcc

0

+3.6

V

Input voltage

Vin

GND

Vcc

 

Lead Soldering

Temperature & Time

240/10

°C/s

 

Operation Environment

Parameter

Symbol

Minimum

Maximum

Units

Supply Voltage

Vcc

3.15

3.45

V

Ambient

operating Temperature

Top

0

+70

°C

Operating Relative Humidity

-

5

95

%

 

Transmitter Section:

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

Parameter

Symbol

Min.

Typ.

Max.

Units

Data rate

-

-

1250

-

Mb/s

Center Wavelength

lo

1270

1310

1350

nm

Output Spectral width

Dl

-

-

4

nm

Average Optical

Output Power

Po

-8

-

-3

dBm

Extinction Ratio

Er

10

-

-

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 Fibre Channel Compatible

Input differential impendence

Zdiff

 

100

 

Ohm

TX disable

Disable

 

2.0

 

Vcc

V

Enable

 

0

 

0.8

V

Fault

Fault

 

2.0

 

Vcc+0.8

V

Normal

 

0

 

0.8

V

 

Receiver Section:

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

Parameter

Symbol

Min.

Typ.

Max.

unit

Data rate

 

 

1250

 

Mb/s

Wavelength

l

1270

1310

1570

nm

Maximum Input Power

Pmax

0

-

-

dBm

Receiver Sensitivity

Pmin

-

-27

-25

dBm

Output differential impendence

Zdiff

 

100

 

Ohm

LOSS Thresholds

LOSSD

-

-

-31

dBm

LOSSA

-34

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EEPROM INFORMATION:

 

Addr

Field Size

(Bytes)

Name of Field

HEX

Description

0

1

Identifier

03

SFP

1

1

Ext. Identifier

04

MOD4

2

1

Connector

07

LC

3-10

8

Transceiver

00 00 00 02 12 00 0D 01

Transmitter Code

11

1

Encoding

01

8B10B

12

1

BR, nominal

0D

1250M bps

13

1

Reserved

00

 

14

1

Length (9um)-km

0A/14/28

10km/20km/40km

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

 

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

Discription

NOTE

1

VeeT

Transmitter Ground

 

2

Tx Fault

Transmitter Fault Indication

1

3

Tx Disable

Transmitter Disable

2

4

MOD DEF2

Module Definition 2

3

5

MOD DEF1

Module Definition 1

3

6

MOD DEF0

Module Definition 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+

Transmit Data Input

6

19

TD-

Inv. Transmit Data Input

6

20

VeeT

Transmitter Ground

 

Notes:

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 (0~0.8V): Transmitter on

(>0.8V, <2.0V): Undefined

High (2.0~3.465V): Transmitter Disabled

Open: Transmitter Disabled

3. MOD-DEF 0,1,2 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 on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the low state, the output will be pulled to less than 0.8V.

 

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

6. These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module.

 

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