The SFP transceiver is high performance, cost effective module supporting 1.25Gbps and 20km transmission distance with SMF(9/125μm).
The transceiver consists of two sections: a 1310nm FP laser transmitter, a PIN photodiode integrated with a trans-impedance amplifier (TIA). The transceiver satisfies class1 laser safety requirements. 
The transceiver is compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

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Vcc

-0.5

0

-40

Maximum Supply Voltage

Ts

4

RH

85

Storage Temperature Range

V

95

Relative Humidity

℃

%

Module Block Diagram

Absolute Maximum Ratings

Parameter

Symbol

Min

Unit

Max

Power Supply Voltage

Case OperatingTemperature Range

Parameter

Vcc

Tc

Recommended Operating Conditions

Symbol

0

3.13

-40

Min

70

85

3.47

Max

℃

V

Unit

Industrial

Notes

3.3

Typical

Supply Current

ITX+RX

300

mA

Differential Input Voltage

Differential output Voltage

VIN

VOUT

300

600

2200

1200

mV

mV

Data Rate

BR

1.25/1.0625

Gbps

Center Wavelength Range

Spectral Width

Launch Optical Power

Extinction Ratio

Contributed Total Jitter added at TP2

Relative Intensity Noise

Parameter

λc

Symbol

Δλ

Pout

EX

TJ

RIN

Optical and Electrical Characteristics

1260

Min

9

-120

Typical

1360

4

-2

0.284

Max

nm

nm

dBm

dB

UI

dB/Hz

Unit

Notes

FP-LD

Transmitter Characteristics

1310

FP-LD

-8

20km 1310nm

FP-LD

1

2

Dispersion Penalty

1

dB

Optical Rise/Fall Time

Trise/Tfall

260

ps

3

Receiver Sensitivity

S

-22

dBm

4

Receiver Overload

Pin

-3

dBm

Loss of Signal-Deasserted

Loss of Signal-Asserted

LOS-D

LOS-A

-35

-22

dB

dB

LOS Hysteresis

0.5

3

5

dB

5

Eye Diagram

Complies with IEEE802.3z eye masks when filtered

Receiver Characteristics

Note:
1. TP refers to the compliance point specified in IEEE802.3z, section 38.2.1. 
2. RIN is the laser noise, integrated over a specified bandwidth, measured relative to average optical power with 12dB return loss. For multimode application, the RIN is better than -117dB/Hz. 
3. Optical transition time is the time interval required for the rising or falling edge of an optical pulse to transition between the 20% and 80% amplitudes relative to the logical 1 and 0 levels.
4. Measured with a PRBS 27-1 test pattern, @1.25Gb/s, EX=10dB, BER<10-12. 
5. The LOS Hysteresis to minimize “chatter” on the output line. In principle, Hysteresis alone does not guarantee chatter-free operation.

Tx_Disable

Tx_Fault

VeeT

Signal Name

Transmitter Disable

Transmitter Ground

Transmitter Fault Indication

Pin Descriptions

Description

Pin

1

3

3

Plug Seq.

1

2

Notes

1

2

3

4

MOD_DEF(2)

SDA Serial Data Signal

3

3

6

5

MOD_DEF(0)

MOD_DEF(1)

TTL Low

SCL Serial Clock Signal

3

3

3

3

8

10

7

9

LOS

VeeR

Rate Select

VeeR

Loss of Signal

Receiver ground

Not Connected

Receiver ground

3

1

3

1

4

12

14

11

13

RD-

VeeR

VeeR

RD+

Inv. Received Data Out

Receiver ground

Receiver ground

Received Data Out

3

1

1

3

5

5

16

18

15

17

VccT

TD+

VccR

VeeT

Transmitter Power Supply

Transmit Data In

Receiver Power Supply

Transmitter Ground

2

3

2

1

6

20

19

VeeT

TD-

Transmitter Ground

Inv. Transmit Data In

1

3

3

6

Note:
1. Tx Fault is open collector output which should be pulled up with a 4.7kΩ~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 input is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7kΩ~10kΩ resistor. Its states are:
Low (0 to 0.8V):              Transmitter on
Between (>0.8V, < 2.0V):      Undefined
High (2.0 to 3.47V):           Transmitter Disabled
Open:                       Transmitter Disabled
3. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7kΩ~10kΩ resistor on the host board to supply less than VccT+0.3V or VccR+0.3V.
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 4.7kΩ~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 100Ω 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. The AC-coupling is done inside the module and is thus not required on host board.

The MSA power supply noise rejection filter is required on the host PCB to meet data sheet performance. The MSA filter incorporates an inductor which should be rated 400mA DC and 1Ω serial resistance or better. It should not be replaced with a ferrite. The required filter is illustrated in Figure. The MSA also specifies that 4.7K to 10KΩ pull-up resistors for Tx Fault, LOS, and MOD_DEF(0,1,2) are required on the host PCB. Figure is the suggested transceiver/host interface.

Recommended Host Board Supply Filtering Circuit

Recommended Interface Circuit

Digital Diagnostic Memory Map

Accessing Serial ID Memory use the 2 wire address 1010000x (A0). Memory contents of Serial ID are shown in the below table.

I2C Read/Write Memory Contents (A0h) Information

Address

0

1

Size(Bytes)

Identifier

Name of Field

03

Contents (Hex)

SFP

Description

2

1

Connector

07

LC Connector

11

12

3-10

1

1

8

Encoding

BR, nominal

Transceiver

03

0D

00 00 00 02 22 00 01 00

NRZ

1250Mbps

Transceiver Codes

17

14

18

15

16

13

1

1

1

1

1

1

Length (62.5um)

Length (9um)-km

Length (copper)

Length (9um)-100m

Length (50um)

Reserved

00

14

00

C8

00

00

Transmit distance is 20km

40-55

20-35

56-59

36

37-39

19

16

16

4

1

3

1

Vendor PN

Vendor name

Vendor rev

Reserved

Vendor OUI

Length (OM3)

43 43 2D 50 45 45 32 32 32 4C 2D xx 44

43 63 6C 6F 75 64 20 20
20 20 20 20 20 20 20 20

31 2E 30 20

00

00 00 00

00

Transceiver product number (ASC II)
xx=53=S or xx=49=I

ASC II 

66

62

67

63

64-65

60-61

1

1

1

1

2

2

BR,max

Reserved

BR,min

CC BASE

Options

Wavelength

00

00

00

Check Sum (variable)

00 1A

05 1E

Check code for base ID fields

Tx_Disable, Tx_Fault and Loss of Signal implemented

1310nm

94

84-91

95

92

93

68-83

1

8

1

1

1

16

SFF-8472

Vendor date code

CC EXT

Diagnostic type

Enhanced option

Vendor SN

03

xx xx xx xx xx xx 20 20

Check Sum (variable)

68

B0

Diagnostics (SFF-8472 Rev10.2)

Year (2 bytes), Month (2 bytes), Day (2 bytes)

Check sum of bytes 64-94 for extended ID fields

Internal Calibrated

Diagnostics (Optional alarm/warning flags, Soft TX_FAULT and Soft TX_LOS monitoring)

Serial Number (ASC II)

96-255

160

Vendor specific

1

1

Ext. Identifier

04

SFP function is defined by serial ID only

Diagnostic Monitor Functions interface use the 2 wire address 1010001x (A2). Memory contents of diagnostic monitor functions are shown in the below table.

Address

00-01

Size(Bytes)

2

I2C Read/Write Memory Contents (A2h) Monitoring Interface

Temperature High Alarm

Name of Field

Description

Temperature set to To-Max+10ºC

Pin Definitions

02-03

2

Temperature Low Alarm

Temperature set to To-Min-10ºC

04-05

06-07

2

2

Temperature High Warning

Temperature Low Warning

Temperature set to To-Max+5ºC

Temperature set to To-Min-5ºC

08-09

10-11

12-13

14-15

2

2

2

2

Vcc High Alarm

Vcc Low Alarm

Vcc High Warning

Vcc Low Warning

3.6V

3.0V

3.5V

3.1V

16-17

18-19

24-25

26-27

20-21

22-23

28-29

30-31

2

2

2

2

2

2

2

2

Bias High Alarm

Bias Low Alarm

TX Power High Alarm

TX Power Low Alarm

Bias High Warning

Bias Low Warning

TX Power High Warning

TX Power Low Warning

100mA

0mA

1dBm

-11dBm

80mA

0mA

-2dBm

-8dBm

32-33

34-35

40-45

36-37

38-39

56-59

60-63

2

2

16

2

2

4

4

RX Power High Alarm

RX Power Low Alarm

Reserved

RX Power High Warning

RX Power Low Warning

RX Power Calibration Data 4

RX Power Calibration Data 3

0dBm

-25dBm

-3dBm

-22dBm

64-67

68-71

78-79

80-81

72-75

76-77

82-83

84-85

4

4

2

2

4

2

2

2

RX Power Calibration Data 2

RX Power Calibration Data 1

Bias Calibration Data 0

TX Power Calibration Data 1

RX Power Calibration Data 0

Bias Calibration Data 1

TX Power Calibration Data 0

Temperature Calibration Data 1

Single precision floating-point number

00 00 ( fixed)

00 01 ( fixed)

00 01 ( fixed) 

00 00 ( fixed)

00 01 ( fixed)

86-87

88-89

95

90-91

92-94

96

97

2

2

1

2

3

1

1

Temperature Calibration Data 0

Vcc Calibration Data 1

Check Sum

Vcc Calibration Data 0

Reserved

Measured Temperature MSB

Measured Temperature LSB

00 00 ( fixed)

00 01 ( fixed)

Checksum of bytes 0-94

00 00 ( fixed)

Internally measured module temperature.

98

99

102

103

100

101

104

105

1

1

1

1

1

1

1

1

Measured Vcc MSB

Measured Vcc LSB

Measured TX Power MSB

Measured TX Power LSB

Measured LD Bias MSB

Measured LD Bias LSB

Measured RX Power MSB

Measured RX Power LSB

Internally measured supply voltage in transceiver.

Measured TX output power.

Internally measured TX Bias Current.

Measured RX input power.

106-109

110

120-127

111

112-119

128-247

248-255

4

1

8

1

8

120

8

Reserved

Logic Status

Vendor Specific

AD Conversion

Alarm and Warning Flags

User writable EEPROM

Vendor Specific

Don’t Access

Don’t Access

Calibration Constants

Name of Field

Real Time Diagnostic Monitor Interface

Internaly calibrated digital diagnostics

Temperature

Parameter

0 ~ 70℃

Range

±3℃

Accuracy

Notes

-40 ~85℃

±3℃

Voltage

3.0 to 3.6V

±3℃

Bias Current

0 to 80mA

±10%

Tx Power

Rx Power

-8 to -2dBm

-22 to -3dBm

±3dB

±3dB