Power and wavelength testing
Test the signal transmission strength and wavelength, ensure the signal decoding capability of the receiver, and maintain consistency in wavelength from the transmitter to the receiver.
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Product Description
SFF-2×5-155M-2Km-MM850This transceiver module is a perfect solution for low-speed communication networks. The module fully complies with the 2 X5 standard package defined by the Miniaturized Multi-Source Agreement (MSA). These transceiver modules provide system designers with a range of SONET/OC-3, SDH/STM-1 telecommunications products, offering reliability, robustness, and high performance for telecommunications, data communications, and other data communication applications.
Product Specifications
FP laser diode emitter
3. 3V power supply
LC duplex optical interface
CML differential input/output and (LV) TTL signal detection
Complies with IEC 825 International Laser Safety Standard, Class 1
Operating ambient temperature range (Standard: 0 to +70°C) or (Industrial: -40°C to +85°C)
Application
ATM 155Mbps
SONET/SDH
100Mbps Ethernet device
Other optical links
Our Advantages
Excellent skills and rich experience
Independent research and development, craftsmanship and intelligence, customizable needs
Imported chips, high-quality solutions, stable performance
Fully compatible. Senior talents to solve technical issues
DDM Digital Diagnosis Real-time Monitoring Module Status
Special test: All performance items have been tested and meet the required standards
Table 1 - Conditions for Absolute Maximum Value
| parameter | symbol | Minimum value | Maximum value | unit | Notes |
| Storage temperature | TST | -40 | +85 | ℃ | – |
| relative humidity | RH | 5 | 95 | % | – |
| power supply voltage | VCC | 0 | +3.6 | In | – |
Table 2 - Recommended Operating Environment and Electrical Characteristics
| parameter | symbol | Minimum value | Typical value | Maximum value | unit | Notes |
| power supply voltage | VCC | +3.1 | +3.3 | +3.5 | In | – |
| Supply current | Icc | – | – | 260 | m.a. | – |
| Operating ambient temperature | TOP | 0 | – | +70 | ℃ | 1 |
| -40 | – | +85 | 2 | |||
| Data rate | B | 155 | Mbps | – | ||
| welding temperature | – | – | 260 | ℃ | 3 | |
| Welding duration | – | – | 10 | Sec | 3 |
Note
1: Standard level
2. Industrial level
3. Wave soldering is not recommended.
Table 3-2×5 SFF transceiver optical characteristics
(Ambient operating temperature Ta = +25±5°C , VCC = 3.3±0.2V)
| parameter | symbol | Minimum value | Typical value | Maximum value | unit | Notes | |
| transmitter | |||||||
| Data rate | B | 155 | Mbps | – | |||
| Output center wavelength | λC | 1260 | 1310 | 1360 | nm | – | |
| Output spectral width (RMS) | l | – | 4.0 | nm | – | ||
| Average optical output power | After | -20 | – | -10 | dBm | 1,2 | |
| Extinction ratio | IS | 10 | – | – | dB | – | |
| Optical output eye diagram: conforms to ITU-T G.957 standard | 1,2 | ||||||
| receiver | |||||||
| Receiver sensitivity | S | – | – | -32 | dBm | 1,2 | |
| Maximum input power | PMAX | -3 | – | – | dBm | 1,2 | |
| Operating center wavelength | λc | 1310 | nm | – | |||
| Signal detection | Alarm | PD | -40 | – | – | dBm | 1,2 |
| Warning | PA | – | – | -32 | dBm | 1,2 | |
| Signal detection - hysteresis | PHYS | 0.5 | – | – | dB | – | |
Note 1: Optical power was fed into the 62.5/125 micrometer MMF.
Note 2: PRBS 223-1 test mode was used at a speed of 155 Mbps.
Table 15 - Electrical Characteristics of Transceivers
(Ambient operating temperature Ta = +25±5°C , V = 3.3±0.2V)
| parameter | symbol | Minimum value | Typical value | Maximum value | unit | Notes |
| power supply voltage | VCC | +3.1 | +3.3 | +3.5 | In | – |
| Supply current | ICC | – | – | 260 | m.a. | – |
| transmitter | ||||||
| Differential input voltage | Come | 200 | – | 2000 | mVP-P | – |
| Input differential impedance | Sentence | 90 | 100 | 110 | Oh | – |
| Data input voltage - low | WILL | VCC -1.81 | – | VCC -1.48 | In | – |
| Data input voltage - High | HIV | VCC -1.17 | – | VCC -0.88 | In | – |
| receiver | ||||||
| Differential output voltage | VOUT | 400 | – | 1000 | mVP-P | – |
| Data output voltage - low | VOL | VCC -1.83 | – | VCC -1.56 | In | – |
| Data output voltage - High | VOH | VCC -1.09 | – | VCC -0.88 | In | – |
| SD Output Voltage - Low | VOL | 0 | – | 0.8 | In | 1 |
Table 16—Pin Function Definitions
| Pin | name | describe | Notes |
| 1 | VEER | Receiver ground | – |
| 2 | VCCR | Receiver power supply | – |
| 3 | SD | Signal Detection (LV) TTL Output | 1 |
| 4 | RD- | Input. Receive data. Output. | – |
| 5 | RD+ | Receive data output | – |
| 6 | VCCT | Transmitter power | – |
| 7 | WATER | Transmitter grounding | – |
| 8 | TDIS | Launcher disabled | 2 |
| 9 | TD+ | Data input is positive | – |
| 10 | TD- | Transmit data input negative | – |
Note 1: (LV) TTL - Normal optical input level of the receiver results in a logic "0" output, pulled up by a 10kΩ resistor.
Note 2: This input is used to disable the transmitter's optical output. When the logic value is "0", the transmitter is on.
Module structure diagram

Test the signal transmission strength and wavelength, ensure the signal decoding capability of the receiver, and maintain consistency in wavelength from the transmitter to the receiver.
Test the bit error rate and packet loss rate, to make them meet the corresponding standards and ensure the performance of transceivers.
Test the transceivers' eye diagram situation, receiving sensitivity, extinction ratio, wavelength, light-emitting, light-receiving, current and voltage, to ensure the signal quality, stability and reliability of the transmission.
Check the end face of the transceivers and keep them clean for more stable data transmission, better performance, and durability.
Every module is quality tested for compatibility in the multi-brand switches environment, guaranteeing flawless operations.