SFPT-LX2-01 - PULSE ELECTRONICS

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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SFPT-LX2-01 ELLA 15, Sep., 2014

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PART NUMBER: SFPT-LX2-01

PRODUCT FEATURES

 Up to 1.25Gb/s data links

 FP laser transmitter and PIN photo-detector

 Up to 20km on 9/125µm SMF

 Hot-pluggable SFP footprint

 Duplex LC/UPC type pluggable optical interface

 Low power dissipation

 Metal enclosure, for lower EMI

 RoHS compliant and lead-free

 Support Digital Diagnostic Monitoring interface

 Single +3.3V power supply

 Compliant with SFF-8472

 Case operating temperature

Commercial: 0°C to +70°C

APPLICATIONS

 Switch to Switch Interface

 Gigabit Ethernet

 Switched Backplane Applications

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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 Router/Server Interface

 Other Optical Links

PRODUCT DESCRIPTION

SFPT-LX2-01 Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor

Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting

amplifier, the digital diagnostic monitor, the FP laser and the PIN photo-detector .The module data link up to

20KM in 9/125um single mode fiber.

The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable

the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is

provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can

also get the LOS (or Link)/Disable/Fault information via I2C register access.

Ordering information

Product part

Number

Data

Rate

(Mbps)

Media

Wavelength

(nm)

Transmission

Distance(km)

Temperature Range

（

（（

（Tcase）（

）（）（

）（℃

℃℃

℃）

））

）

SFPT-LX2-01 1250 Single mode fiber

1310 20 0~70 commercial

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

PART NUMBER DFTO DATE REVISION

SHEET NO

SFPT-LX2-01 ELLA 15, Sep., 2014

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I. Pin Descriptions

Pin Symbol Name/Description NOTE

1 VEET Transmitter Ground (Common with Receiver Ground) 1

2 TFAULT Transmitter Fault.

3 TDIS Transmitter Disable. Laser output disabled on high or open. 2

4 MOD_DEF(2) Module Definition 2. Data line for Serial ID. 3

5 MOD_DEF(1) Module Definition 1. Clock line for Serial ID. 3

6 MOD_DEF(0) Module Definition 0. Grounded within the module. 3

7 Rate Select No connection required 4

8 LOS Loss of Signal indication. Logic 0 indicates normal operation. 5

9 VEER Receiver Ground (Common with Transmitter Ground) 1

10 VEER Receiver Ground (Common with Transmitter Ground) 1

11 VEER Receiver Ground (Common with Transmitter Ground) 1

12 RD- Receiver Inverted DATA out. AC Coupled

13 RD+ Receiver Non-inverted DATA out. AC Coupled

14 VEER Receiver Ground (Common with Transmitter Ground) 1

15 VCCR Receiver Power Supply

16 VCCT Transmitter Power Supply

17 VEET Transmitter Ground (Common with Receiver Ground) 1

18 TD+ Transmitter Non-Inverted DATA in. AC Coupled.

19 TD- Transmitter Inverted DATA in. AC Coupled.

20 VEET Transmitter Ground (Common with Receiver Ground) 1

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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SFPT-LX2-01 ELLA 15, Sep., 2014

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Notes:

1. Circuit ground is internally isolated from chassis ground.

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

3. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V.MOD_DEF (0)

pulls line low to indicate module is plugged in.

4. This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates

(most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with >

30kΩ resistor. The input states are:

 Low (0 – 0.8V): Reduced Bandwidth

 (>0.8, < 2.0V): Undefined

 High (2.0 – 3.465V): Full Bandwidth

 Open: Reduced Bandwidth

5. LOS is open collector output should be pulled up with 4.7k - 10kohms on host board to a voltage between

2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

Figure2. Pin out of Connector Block on Host Board

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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II. Absolute Maximum Ratings

III. Recommended Operating Conditions

IV. Specification of Transmitter

Parameter Symbol

Min. Typ. Max. Unit Note

Storage Temperature Ts -40 85 ºC

Storage Ambient Humidity HA 5 95 %

Power Supply Voltage VCC -0.5 4 V

Signal Input Voltage -0.3 Vcc+0.3

V

Receiver Damage Threshold +5 dBm

Parameter Symbol

Min. Typ. Max.

Unit Note

Case Operating Temperature Tcase 0 70 ºC SFPT-LX2-01

Ambient Humidity HA 5 70 % Non-condensing

Power Supply Voltage VCC 3.13 3.3 3.47 V

Power Supply Current ICC 280 mA

Power Supply Noise Rejection 100 mVp-p 100Hz to 1MHz

Data Rate 1250/1250 Mbps TX Rate/RX Rate

Transmission Distance 20 KM

Coupled Fiber Single mode fiber 9/125um SMF

Parameter Symbol

Min. Typ.

Max.

Unit Note

Average Output Power POUT -9 -3 dBm Note (1)

Extinction Ratio ER 9 dB

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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Note (1): Measure at 2^7-1 NRZ PRBS pattern.

Note (2): Transmitter eye mask definition.

V. Specification of Receiver

Note (1): Measured with Light source 1310nm, ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ.

Center Wavelength λC 1270 1310 1360 nm FP Laser

Spectrum Bandwidth(RMS) σ 3.5 nm

Transmitter OFF Output Power POff -45 dBm

Differential Line Input Impedance RIN 90 100 110 Ohm

Output Eye Mask Compliant with IEEE802.3 z (class 1 laser

safety)

Note (2)

Parameter Symbol Min.

Typ.

Max.

Unit Note

Input Optical Wavelength λIN 1270 1610 nm PIN-TIA

Receiver Sensitivity PIN -20 dBm Note (1)

Input Saturation Power (Overload) PSAT -3 dBm

Los Of Signal Assert PA -21 dBm

Los Of Signal De-assert PD -38 dBm Note (2)

LOS Hysteresis PA-PD 0.5

2 6 dB

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

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Note (2): When LOS de-asserted, the RX data+/- output is High-level (fixed)

VI. Electrical Interface Characteristics

Note (1): A (TX) + B (RX) = 280mA (Not include termination circuit)

VII. Digital Diagnostic Functions

SFPT-LX2-01 transceivers support the 2-wire serial communication protocol as defined in the SFP MSA. It is

very closely related to the E2PROM defined in the GBIC standard, with the same electrical specifications.

The standard SFP serial ID provides access to identification information that describes the transceiver’s

capabilities, standard interfaces, manufacturer, and other information.

Additionally, SFP transceivers provide a unique enhanced digital diagnostic monitoring interface, which allows

real-time access to device operating parameters such as transceiver temperature, laser bias current, transmitted

optical power, received optical power and transceiver supply voltage .It also defines a sophisticated system of

alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set

normal range.

The SFP MSA defines a 256-byte memory map in E2PROM that is accessible over a 2-wire serial interface at the

8 bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit address

1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical

Parameter Symbol Min. Typ. Max. Unit Note

Transmitter

Total Supply Current ICC A mA Note (1)

Transmitter Disable Input-High VDISH 2 Vcc+0.3

V

Transmitter Disable Input-Low VDISL 0 0.8 V

Transmitter Fault Input-High VDISL 2 Vcc+0.3

V

Transmitter Fault Input-Low VTxFH 0 0.8 V

Receiver

Total Supply Current ICC B mA Note (1)

LOSS Output Voltage-High VLOSH 2 Vcc+0.3

V LVTTL

LOSS Output Voltage-Low VLOSL 0 0.8 V

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

PART NUMBER DFTO DATE REVISION

SHEET NO

SFPT-LX2-01 ELLA 15, Sep., 2014

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to, and is thus fully backward compatible with both the GBIC Specification and the SFP Multi Source Agreement.

The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver

Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. When the serial

protocol is activated, the serial clock signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks

data into the SFP transceiver into those segments of the E2PROM that are not write-protected. The negative edge

clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-directional for serial data

transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The

memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

Digital diagnostics for the SFPT-LX2-01 are internally calibrated by default.

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

PART NUMBER DFTO DATE REVISION

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SFPT-LX2-01 ELLA 15, Sep., 2014

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VIII. Recommend Circuit Schematic

VccR

3.3V

VeeT

Amplifier

EEPROM

0.1uF

VeeR

0.

1uF

Rx_LOS

1uH

SerDes IC

1uH

100 Ohm

RES1

VCC

TD+

TD

-

RES1

Protocol Vcc

Rx_LOS

0.1uF

Tx_Disable

Tx_Fault

0.1uF

10uF

* Depands onSerDes IC used

RES1=4.7K to10K Ohms

100 Ohm

RD+

RD-

Tx_Fault

Mod_def 2

PLD/PAL

Photo Diode

Laser Diode

Tx_Disable

Mod_def 0

3.3V

10K

RES1

VccT

RES1

0.1uF

Mod_def 1

10uF

SFP Module

Protocol IC

0.1uF

Laser Driver

PRODUCT DATASHEET

1.25Gb/s 1310nm Single-mode SFP Transceiver

PART NUMBER DFTO DATE REVISION

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IX. Mechanical Specifications (Unit: mm

0.1

±0.1

SFPT-LX2-01

X. Regulatory Compliance

Feature Reference Performance

Electrostatic discharge（ESD） IEC/EN 61000-4-2 Compatible with standards

Electromagnetic Interference (EMI) FCC Part 15 Class B EN 55022 Class B

(CISPR 22A) Compatible with standards

Laser Eye Safety FDA 21CFR 1040.10, 1040.11 IEC/EN

60825-1，2 Class 1 laser product

Component Recognition IEC/EN 60950 ，UL Compatible with standards

ROHS 2002/95/EC Compatible with standards

EMC EN61000-3 Compatible with standards