SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km

SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km

Up to 1.25Gbps bi-directional data links 1550nm DFP laser and PIN photo detector for 120km transmission Compliant with SFP MSA and SFF-8472 with single LC receptacle Digital Diagnostic Monitoring: Internal Calibration or External Calibration Compatible with SONET Compatible with RoHS +3.3V single power supply Operating case temperature:     Standard :0 to +70°C     Industrial : -40 to +85°C

Download instructions

SFP_B1254L_120.pdf

Specifications

 
Description  of this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km
 
Features
  • Up to 1.25Gbps bi-directional data links
  • 1550nm DFP laser and PIN photo detector for 120km transmission
  • Compliant with SFP MSA and SFF-8472 with single LC receptacle
  • Digital Diagnostic Monitoring: Internal Calibration or External Calibration
  • Compatible with SONET
  • Compatible with RoHS
  • +3.3V single power supply
  • Operating case temperature:
  • Standard :0 to +70°C
  • Industrial : -40 to +85°C

Applications

  • SDH and SONET system
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems

 Description

The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps and 120km transmission distance with SMF.

The transceiver consists of three sections: a DFP 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.

 
Parameter of this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km
 
Absolute Maximum Ratings 
 

Parameter

Symbol

Min

Max

Unit

  Supply Voltage

Vcc

-0.5

4.5

V

  Storage Temperature

Ts

-40

+85

°C

  Operating Humidity

-

5

85

%

 
Recommended Operating Conditions 

Parameter

Symbol

Min

Typical

Max

Unit

  Operating Case Temperature

Standard

Tc

0

 

+70

°C

Extended

-20

 

+80

°C

Industrial

-40

 

+85

°C

  Power Supply Voltage

Vcc

3.135

3.30

3.465

V

  Power Supply Current

Icc

 

 

300

mA

  Data Rate

 

0.1

1.25

 

Gbps

 
Optical and Electrical Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Transmitter

  Centre Wavelength

λc

1530

1550

1570

nm

 

  Spectral Width(-20dB)

Δλ

 

 

1

nm

 

  Side-Mode Suppression Ratio

SMSR

30

 

 

dB

 

  Average Output Power

Pout

1

 

+5

dBm

1

  Extinction Ratio

ER

9.0

 

 

dB

 

  Data Input Swing Differential

VIN

180

 

1200

mV

2

  Input Differential Impedance

ZIN

90

100

110

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

1490

1510

nm

 

  Receiver Sensitivity

 

 

 

-28

dBm

3

  Receiver Overload

 

-1

 

 

dBm

3

  LOS De-Assert

LOSD

 

 

-29

dBm

 

  LOS Assert

LOSA

-38

 

 

dBm

 

  LOS Hysteresis

 

0.5

 

4

dB

 

  Data Output Swing Differential

Vout

600

800

1000

mV

4

  LOS

High

2.0

 

Vcc

V

 

Low

 

 

0.8

V

 

Notes:

  1. The optical power is launched into SMF.
  2. PECL input, internally AC-coupled and terminated.
  3. Measured with a PRBS 223-1 test pattern @1250Mbps, BER ≤1×10-12.
  4. Internally AC-coupled.

Timing and Electrical

Parameter

Symbol

Min

Typical

Max

Unit

  Tx Disable Negate Time

  t_on

 

 

1

ms

  Tx Disable Assert Time

  t_off

 

 

10

µs

  Time To Initialize, including Reset of Tx Fault

  t_init

 

 

300

ms

  Tx Fault Assert Time

  t_fault

 

 

100

µs

  Tx Disable To Reset

  t_reset

10

 

 

µs

  LOS Assert Time

  t_loss_on

 

 

100

µs

  LOS De-assert Time

  t_loss_off

 

 

100

µs

  Serial ID Clock Rate

  f_serial_clock

 

100

400

KHz

  MOD_DEF (0:2)-High

  VH

2

 

Vcc

V

  MOD_DEF (0:2)-Low

  VL

 

 

0.8

V

 
Diagnostics

Parameter

Range

Unit

Accuracy

Calibration

  Temperature

  0 to +70

°C

±3°C

Internal

 -20 to +80

-40 to +85

  Voltage

3.0 to 3.6

V

±3%

Internal

  Bias Current

0 to 100

mA

±10%

Internal

  TX Power

0 to +5

dBm

±3dB

Internal

  RX Power

-28 to -1

dBm

±3dB

Internal

 
Digital Diagnostic Memory Map
 
The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).

The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.

The digital diagnostic memory map specific data field defines as following.

 

Pin Definitions

Pin Diagram

 

Pin Descriptions

Pin

Signal Name

Description

Plug Seq.

Notes

1

VEET

Transmitter Ground

1

 

2

TX FAULT

Transmitter Fault Indication

3

Note 1

3

TX DISABLE

Transmitter Disable

3

Note 2

4

SDA

SDA Serial Data Signal

3

 

5

SCL

SCL Serial Clock Signal

3

 

6

MOD_ABS

Module Absent. Grounded within the module

3

 

7

RS0

Not Connected

3

 

8

LOS

Loss of Signal

3

Note 3

9

VEER

Receiver ground

1

 

10

VEER

Receiver ground

1

 

11

VEER

Receiver ground

1

 

12

RD-

Inv. Received Data Out

3

Note 4

13

RD+

Received Data Out

3

Note 4

14

VEER

Receiver ground

1

 

15

VCCR

Receiver Power Supply

2

 

16

VCCT

Transmitter Power Supply

2

 

17

VEET

Transmitter Ground

1

 

18

TD+

Transmit Data In

3

Note 5

19

TD-

Inv. Transmit Data In

3

Note 5

20

VEET

Transmitter Ground

1

 

Notes:

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) Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

3) LOS is open collector output.  Should be pulled up with 4.7k~10kΩ on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

4) 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.

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

Recommended Interface Circuit

 

Mechanical Dimensions

 

Ordering information

Model No.

Product Description

SFP-B1254L-120

1.25Gbps,TX1550/RX1490nm,LC,120km,0ºC ~ +70ºC, with DDM

SFP-B1254L-120I

1.25Gbps,TX1550/RX1490nm,LC,120km,-40ºC ~ +85ºC, with DDM

 
Image  of this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km
 
 
 
Our Factory of this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km

Our factory has more experience in production SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km,and we can provide multiple types related products. If you want to know more details about these, welcome to contact us!

Our Service  of this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km

We have standardization process in production SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km, and ensuring our product’s quality.We have professional pre-sales team, they can answer your each questions.We have hard-working after-sales team, who are providing after-sales service and protection for our clients.

Corporate vision:To be the benchmark for the optical fiber industry.

Corporate Mission:Leading the industry; Providing satisfiedcommunication products, solutions and services to worldwide customers.

 To invest in both personal and corporate growth simultaneously.

Core Values:Creating Customer Value. Insisting on R & D and Innovation. Building a Global Network. Adhering to Humanistic Management .

 Looking forward to your inquiry for this SFP-B1254L-120 1.25Gbps SFP Bi-Directional Transceiver 120km.


You might also like