40G CWDM4 QSFP+ LR4 Transceiver for 10km SMF Links, Duplex LC
QSFP+40-CW4-10(LR4)-LCD
- Broad Multi-Brand Compatibility
- Flexible Customization Support
- Tested for Reliable Performance
- Fast Response & Delivery
- Professional Technical Support
The FC-LINK QSFP+ 40G CWDM4 10km LR4 LC DX transceiver is engineered for 40GBASE Ethernet connections, supporting up to 10 kilometers over single-mode fiber (SMF) at a 1310nm wavelength, using duplex LC connectors. It complies with QSFP+ MSA, IEEE 802.3ba 40GBASE-LR4, and OTU3 C4S1-2D1 standards. Additionally, it offers digital diagnostics through the I2C interface as outlined by the QSFP+ MSA, enabling real-time monitoring of operating parameters. This hot-swappable, easy-to-install transceiver is ideal for use in data centers, high-performance computing, and enterprise core and distribution networks.
| SPECIFICATIONS | |||
|---|---|---|---|
| Product Model | QSFP+40-CW4-10(LR4)-LCD | Manufacturer Brand | FC-LINK |
| Package Type | QSFP+ | Optical Connector | LC Duplex |
| Max Data Rate | 40Gbps | Channel Data Rate | 10Gbps |
| Effective Transmission Distance | 10km | ||
| Wavelength | 1271nm 1291nm 1311nm 1331nm | Operating Voltage | 3.3V |
| Fiber Type | SMF | Core Size | 9/125µm |
| Transmitter Type | DFBs | Receiver Type | PIN |
| TX Power | -7~+2.3dBm | Receiver Sensitivity | < -11.5dBm |
| Digital Diagnostic Monitoring(DDM) | YES | Receiver Overload | 2.3dBm |
| Power Consumption | ≤3.5W | Protocols | IEEE 802.3ba(40GBASE-LR4) |
| Operating Temperature(Commercial) | 0℃~+70℃ | Storage Temperature(Commercial) | -40℃~+85℃ |
| Operating Temperature(Industrial) | -40℃~+85℃ | Storage Temperature(Industrial) | -40℃~+85℃ |
Server-to-Switch Data Center Links
Used for 10G/25G/100G optical uplinks between servers and top-of-rack switches in high-density data center deployments.
Building-to-Building Campus Backbone
Suitable for 1G/10G fiber links between office buildings, campus distribution rooms, and backbone aggregation points.
Access-to-Core Enterprise Uplinks
Designed for switch uplinks from access to aggregation or core layers in enterprise and campus network architectures.
Industrial Switching in Harsh Environments
Applied in industrial Ethernet, automation systems, and outdoor cabinets where wider temperature tolerance and stable fiber communication are required.
Compatible Brands
Customization Options
Vendor Coding
Private Label
Custom Part Number
Packaging Design
Temperature Grade Selection
| Absolute Maximum Ratings | |||||||||
| Parameter | Symbol | Min. | Max. | Unit | |||||
| Storage temperature | TS | -40 | +85 | °C | |||||
| Supply voltage | VCC | -0.5 | 3.6 | V | |||||
| Operating relative humidity | RH | 0 | 85 | % | |||||
| *Exceeding any one of these values may destroy the device immediately. | |||||||||
| Recommended Operating Conditions | |||||||||
| Parameter | Symbol | Min. | Typical | Max. | Unit | ||||
| Operating case temperature | Tc | 0 | - | +70 | °C | ||||
| Power supply voltage | Vcc | 3.15 | 3.3 | 3.45 | V | ||||
| Power supply current | Icc | - | - | 1100 | mA | ||||
| Power dissipation | PD | - | - | 3.5 | W | ||||
| Aggregate bit rate | BRAVE | - | 41.25(40GE) 43.018(OTU3) |
- | Gbps | ||||
| Lane bit rate | BRLANE | - | 10.3125(40GE) 10.7546(OTU3) |
- | Gbps | ||||
| Performance Specifications-Electrical | |||||||||
| Parameter | Symbol | Min. | Typ. | Max | Unit | Notes | |||
| Transmitter | |||||||||
| Single ended input voltage tolerance | - | -0.3 | - | 4 | V | Referred to TP1 signal common | |||
| Differential input amplitude | - | 150 | - | 1000 | mvp-p | ||||
| AC common mode input voltage tolerance | - | 15 | - | - | mV | RMS | |||
| Input impedance(differential) | Zin | 85 | 100 | 115 | ohms | Rin > 100 kohms @ DC | |||
| TX Disable | Disable | VIH | 2 | - | Vcc+0.3 | V | - | ||
| Enable | VIL | 0 | - | 0.8 | - | ||||
| TX FAULT | Fault | VOH | 2.4 | - | Vcc+0.3 | V | - | ||
| Normal | VOL | 0 | - | 0.8 | - | ||||
| Receiver | |||||||||
| Single ended output voltage | - | -0.3 | - | 4 | s | Referred to ignal common | |||
| Differential output amplitude | - | 290 | - | 1000 | mvp-p | - | |||
| AC common mode voltage | - | - | - | 7.5 | mV | RMS | |||
| Termination mismatch at 1MHz | - | - | - | 5 | % | - | |||
| Output impedance(differential) | Zout | 85 | 100 | 115 | ohms | - | |||
| Output rise/fall time | tr/tf | 30 | - | - | ps | 10%~90% | |||
| RX_LOS | LOS | VOH | 2.4 | - | Vcc+0.3 | V | - | ||
| Normal | VOL | 0 | - | 0.8 | V | - | |||
| Optical and Electrical Characteristics | |||||||||
| Parameter | Symbol | Min. | Typical | Max. | Unit | ||||
| SMF | L | - | 10 | - | km | ||||
| Aggregate bit rate | BRAVE | - | 41.25 | - | Gbps | ||||
| Per lane bit rate | BRLANE | - | 10.3125 | - | Gbps | ||||
| Transmitter | |||||||||
| Channels wavelength | λC | 1264.5 | 1271 | 1277.5 | nm | ||||
| 1284.5 | 1291 | 1297.5 | |||||||
| 1304.5 | 1311 | 1317.5 | |||||||
| 1324.5 | 1331 | 1337.5 | |||||||
| -20dB spectral width | ∆λ | - | - | 1 | nm | ||||
| Average launch power, each lane | Pout/lane | -7 | - | 2.3 | dBm | ||||
| Transmit OMA, per lane | TX_OMA/lane | -4 | - | 3.5 | dBm | ||||
| Extinction ratio | Er | 3.5 | - | - | dB | ||||
| Output optical eye | IEEE 802.3ba-2010 Compliant | ||||||||
| Receiver | |||||||||
| Channels wavelength | λC | 1264.5 | 1271 | 1277.5 | nm | ||||
| 1284.5 | 1291 | 1297.5 | |||||||
| 1304.5 | 1311 | 1317.5 | |||||||
| 1324.5 | 1331 | 1337.5 | |||||||
| Damage threshold | - | 5.5 | - | - | dBm | ||||
| Receiver sensitivity in OMA, each lane | Pmins | - | - | - 11.5 | dBm | ||||
| Maximum receive power, each lane | Pmax | 2.3 | - | - | dBm | ||||
| Receiver reflectance | Rr | - | - | -26 | dB | ||||
| Los de-assert | LOSD | - | - | - 11.5 | dBm | ||||
| Los assert | LOSA | -24 | - | - | dBm | ||||
| Los hysteresis | - | 0.5 | - | - | dB | ||||
| Functional Description of Transceiver |
| QSFP+ Transceiver Electrical Pad Layout |
| Pin Arrangement And Definition | |||||||||
| Pin | Logic | Symbol | Description | Plug Sequence | Notes | ||||
| 1 | - | GND | Ground | 1 | 1 | ||||
| 2 | CML-I | Tx2n | Transmitter Inverted Data Input | 3 | - | ||||
| 3 | CML-I | Tx2p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 4 | - | GND | Ground | 1 | 1 | ||||
| 5 | CML-I | Tx4n | Transmitter Inverted Data Input | 3 | - | ||||
| 6 | CML-I | Tx4p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 7 | - | GND | Ground | 1 | 1 | ||||
| 8 | LVTTL-I | ModSelL | Module Select | 3 | - | ||||
| 9 | LVTTL-I | ResetL | Module Reset | 3 | - | ||||
| 10 | - | VccRx | +3.3V Power Supply Receiver | 2 | 2 | ||||
| 11 | LVCMOS- I/O | SCL | 2-wire Serial Interface Clock | 3 | - | ||||
| 12 | LVCMOS- I/O | SDA | 2-wire Serial Interface Data | 3 | - | ||||
| 13 | - | GND | Ground | 1 | 1 | ||||
| 14 | CML-O | Rx3p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 15 | CML-O | Rx3n | Receiver Inverted Data Output | 3 | - | ||||
| 16 | - | GND | Ground | 1 | 1 | ||||
| 17 | CML-O | Rx1p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 18 | CML-O | Rx1n | Receiver Inverted Data Output | 3 | - | ||||
| 19 | - | GND | Ground | 1 | 1 | ||||
| 20 | - | GND | Ground | 1 | 1 | ||||
| 21 | CML-O | Rx2n | Receiver Inverted Data Output | 3 | - | ||||
| 22 | CML-O | Rx2p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 23 | - | GND | Ground | 1 | 1 | ||||
| 24 | CML-O | Rx4n | Receiver Inverted Data Output | 3 | - | ||||
| 25 | CML-O | Rx4p | Receiver Non-Inverted Data Output | 3 | - | ||||
| 26 | - | GND | Ground | 1 | 1 | ||||
| 27 | LVTTL-O | ModPrsL | Module Present | 3 | - | ||||
| 28 | LVTTL-O | IntL | Interrupt | 3 | - | ||||
| 29 | - | VccTx | +3.3V Power supply transmitter | 2 | 2 | ||||
| 30 | - | Vcc1 | +3.3V Power supply | 2 | 2 | ||||
| 31 | LVTTL-I | LPMode | Low Power Mode | 3 | - | ||||
| 32 | - | GND | Ground | 1 | 1 | ||||
| 33 | CML-I | Tx3p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 34 | CML-I | Tx3n | Transmitter Inverted Data Input | 3 | - | ||||
| 35 | - | GND | Ground | 1 | 1 | ||||
| 36 | CML-I | Tx1p | Transmitter Non-Inverted Data Input | 3 | - | ||||
| 37 | CML-I | Tx1n | Transmitter Inverted Data Input | 3 | - | ||||
| 38 | - | GND | Ground | 1 | 1 | ||||
| 1: GND is the symbol for signal and supply (power) common for the QSFP+ module. All are common within the QSFP+ module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal-common ground plane. | |||||||||
| 2: Vcc Rx, Vcc1 and Vcc Tx are the receiver and transmitter power supplies and shall be applied concurrently. Requirements defined for the host side of the Host Edge Card Connector are listed in Table 6. Recommended host board power supply filtering is shown in Figures 3 and 4. Vcc Rx Vcc1 and Vcc Tx may be internally connected within the QSFP+ Module in any combination. The connector pins are each rated for a maximum current of 500mA. | |||||||||
Performance Testing
Each module is tested before shipment to help ensure stable optical and electrical performance.
Compatibility Verification
Compatibility validation is available for major switch and router platforms.
Reliability Screening
Selected products support aging, temperature cycle, and stability testing for demanding applications.
Traceable Quality Control
Inspection and production records support more consistent quality control and batch traceability.
