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 DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA), and an MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.
Features
Applications
Module Block Diagram
Absolute Maximum Rating
Parameters | Symbol | Min. | Max. | Unit |
Power Supply Voltage | VCC | -0.5 | +4.0 | V |
Storage Temperature | Tc | -40 | +85 | C |
Relative Humidity | RH | 5 | 85 | % |
Recommended Operating Environment
Parameter | Symbol | Min | Typical | Max | Unit | |
Operating Case Temperature | Standard | Tc | 0 | +70 | °C | |
Industrial | -40 | +85 | °C | |||
Power Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
Power Supply Current | Icc | 300 | mA | |||
Data Rate | 1.25 | Gbps |
Optical and Electrical Characteristics
Parameter | Symbol | Min | Typical | Max | Unit | Notes | |
Transmitter | |||||||
Centre Wavelength | λc | 1480 | 1550 | 1580 | nm | ||
Spectral Width (RMS) | σ | 1 | nm | ||||
Side Mode Suppression Ratio | SMSR | 30 | dB | ||||
Average Output Power | Pout | 0 | 5 | dBm | 1 | ||
Extinction Ratio | ER | 9 | dB | ||||
Optical Rise/Fall Time (20%~80%) | tr/tf | 0.26 | ns | ||||
Data Input Swing Differential | VIN | 400 | 1800 | 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 | 1260 | 1580 | nm | |||
Receiver Sensitivity | -30 | dBm | 3 | ||||
Receiver Overload | -9 | dBm | 3 | ||||
LOS De-Assert | LOSD | -32 | dBm | ||||
LOS Assert | LOSA | -35 | dBm | ||||
LOS Hysteresis | 0.5 | 4.5 | dB | ||||
Data Output Swing Differential | Vout | 400 | 1800 | mV | 4 | ||
LOS | High | 2.0 | Vcc | V | |||
Low | 0.8 | V |
Notes:
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 | 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 / External |
-20 to +85 | ||||
Voltage | 3.0 to 3.6 | V | ±3% | Internal / External |
Bias Current | 0 to 100 | mA | ±10% | Internal / External |
TX Power | 0 to +5 | dBm | ±3dB | Internal / External |
RX Power | -30 to -9 | dBm | ±3dB | Internal / External |
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 Definition
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 | MOD_DEF(2) | SDA Serial Data Signal | 3 | Note 3 |
5 | MOD_DEF(1) | SCL Serial Clock Signal | 3 | Note 3 |
6 | MOD_DEF(0) | TTL Low | 3 | Note 3 |
7 | Rate Select | Not Connected | 3 | |
8 | LOS | Loss of Signal | 3 | Note 4 |
9 | VEER | Receiver ground | 1 | |
10 | VEER | Receiver ground | 1 | |
11 | VEER | Receiver ground | 1 | |
12 | RD- | Inv. Received Data Out | 3 | Note 5 |
13 | RD+ | Received Data Out | 3 | Note 5 |
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 6 |
19 | TD- | Inv. Transmit Data In | 3 | Note 6 |
20 | VEET | Transmitter Ground | 1 |
Notes: Plug Seq.: Pin engagement sequence during hot plugging.
Low (0 to 0.8V): Transmitter on
(>0.8V, < 2.0V): Undefined
High (2.0 to 3.465V): Transmitter Disabled
Open: Transmitter Disabled
Mod-Def 0 is grounded by the module to indicate that the module is present
Mod-Def 1 is the clock line of the two-wire serial interface for serial ID
Mod-Def 2 is the data line of the two-wire serial interface for serial ID
Regulatory Compliance
LinkWell SFP transceiver is designed to be Class I Laser safety compliant and is certified per the following standards:
Feature | Agency | Standard |
Laser Safety | FDA | CDRH 21 CFR 1040 and Laser Notice No. 50 |
Product Safety | UL | UL and CUL EN60950-2: 2007 |
Environmental protection | SGS | RoHS Directive 2002/95/EC |
EMC | CCIC | EN 55022: 2006+A1: 2007 EN 55024: 1998+A1+A2: 2003 |
Ordering Information
Part Number | Product Description |
LW-SFP-1512-120D | SFP, 1550nm, 1.25Gbps, 120km, 0ºC ~ +70ºC, With Digital Diagnostic Monitoring |
LW-SFP -1512-120DI | SFP, 1550nm, 1.25Gbps, 120km, -40ºC ~ +85ºC, With Digital Diagnostic Monitoring |
References
Important Notice
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by LinkWell before they become applicable to any particular order or contract. In accordance with the LinkWell policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of LinkWell or others. Further details are available from any LinkWell sales representative.