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The FS SFP-10GSR-85 is a 10G SFP+ short-reach transceiver designed for 10GBASE-SR / 10GBASE-SW Ethernet over multimode fiber. It operates at 850nm using a VCSEL laser and supports link distances up to 300 meters on 50/125 µm MMF (OM3/OM4). The module features Digital Optical Monitoring (DOM/ DDM) for real-time measurement of optical power, temperature, and supply voltage, ensuring reliable performance in data center and telecom environments.
Compliant with SFP+ MSA (SFF-8431/SFF-8432) and IEEE 802.3ae 10GBASE-SR standards, the SFP-10GSR-85 provides hot-pluggable connectivity, low power consumption (<1 W), and robust interoperability. It is suitable for server uplinks, ToR switches, and OBSAI/CPRI applications, offering a compact, efficient, and fully standardized solution for high-speed Ethernet networks.

The SFP-10GSR-85 is a high-performance 10G SFP+ optical transceiver designed for 10GBASE-SR / 10GBASE-SW Ethernet links over multimode fiber (MMF). Operating at 850nm with VCSEL transmitter technology, it supports link distances of up to 300 meters on OM3 MMF and 400 meters on OM4 MMF using a duplex LC connector.
This transceiver is fully compliant with SFP+ MSA specifications (SFF-8431, SFF-8432) and the IEEE 802.3ae 10GBASE-SR standard, ensuring seamless interoperability in multi-vendor environments. It features a limiting receiver, providing reliable performance in high-speed 10 Gigabit Ethernet applications. Designers integrating the SFP-10GSR-85 with EDC PHY devices should follow the IC manufacturer’s recommended configurations for optimal host board compatibility.
The module includes Digital Optical Monitoring (DOM/ DDM) via a 2-wire serial interface, as defined in SFF-8472, enabling real-time monitoring of optical output power, received power, temperature, and supply voltage. With low power consumption (<1 W), hot-pluggable design, and compact SFP+ form factor, the SFP-10GSR-85 is suitable for data center uplinks, server interconnects, enterprise wiring closets, OBSAI/CPRI transport applications, and Radio/Baseband Units (RUs/BBUs).
Fully RoHS 2.0 compliant, the SFP-10GSR-85 provides a reliable, standardized, and energy-efficient solution for high-speed 10G networks.

The SFP-10GSR-85 Datasheet highlights a robust feature set designed for high-speed 10 Gigabit Ethernet deployments over multimode fiber.
High Data Rate: Supports data transmission up to 10.31 Gbps, ensuring reliable 10G network performance.
850 nm VCSEL Transmitter: Utilizes a vertical-cavity surface-emitting laser (VCSEL) for efficient, low-power optical transmission.
Short-Reach Fiber Support: Compatible with OM3 multimode fiber up to 300 meters (50/125 µm) and OM4 fiber up to 400 meters, making it ideal for data center and enterprise interconnects.
Low Power Consumption: Operates with a single 3.3V power supply and TTL logic interface, with power dissipation < 1.0 W, optimizing energy efficiency.
Hot-Pluggable SFP+ Form Factor: Features a duplex LC connector interface for easy installation and maintenance without network downtime.
Dispersion Tolerance: Provides tolerance up to 40 ps/nm over G.651, ensuring stable signal integrity over multimode fiber.
Wide Operating Temperature Range: Designed to operate reliably from 0°C to +70°C, suitable for standard data center environments.
Standards Compliance: Fully compliant with SFP+ MSA (SFF-8431) specifications and IEEE 802.3ae 10GBASE-SR/SW, guaranteeing interoperability across multi-vendor networks.
RoHS 2.0 Compliant: Meets environmental safety standards, supporting sustainable and regulatory-compliant deployments.
This feature set makes the SFP-10GSR-85 an ideal choice for high-performance, short-reach optical networks, including Top-of-Rack uplinks, server interconnections, and telecom applications such as OBSAI and CPRI.
| Parameter | Specification |
|---|---|
| Data Rate | Up to 10.31 Gbps |
| Wavelength | 850 nm VCSEL |
| Fiber Type | 50/125 µm MMF (OM3/OM4) |
| Maximum Distance | 300 m (OM3), 400 m (OM4) |
| Connector Type | Duplex LC |
| Power Supply | 3.3 V |
| Power Consumption | < 1.0 W |
| Dispersion Tolerance | Up to 40 ps/nm (G.651) |
| Operating Temperature | 0°C to +70°C |
| Standards Compliance | SFP+ MSA (SFF-8431), IEEE 802.3ae 10GBASE-SR/SW |
| RoHS Compliance | Yes, RoHS 2.0 |
The SFP-10GSR-85 SFP+ transceiver, as detailed in the SFP-10GSR-85 Datasheet, is engineered for versatile deployment across modern networking environments. Leveraging 10GBASE-SR/SW standards and 850nm VCSEL optics, this SFP+ module supports high-speed 10Gbps connectivity over multimode fiber with distances up to 300 meters (OM3) and 400 meters (OM4). Its low power consumption, hot-pluggable design, and digital optical monitoring (DOM/DDM) make it ideal for a variety of professional networking applications.

In data center environments, the SFP-10GSR-85 enables reliable ToR (Top-of-Rack) uplinks, server-to-server connections, and high-density switch interconnects. Its compatibility with 50/125 µm MMF ensures seamless integration with OM3/OM4 cabling infrastructures. Network engineers can leverage this module for:
High-speed aggregation links between switches
Redundant uplinks for failover scenarios
Multi-vendor interoperability, reducing dependency on OEM-specific optics
Enterprise wiring closets and corporate campuses benefit from the SFP-10GSR-85’s high-bandwidth capabilities. Typical use cases include:
Inter-building connectivity over multimode fiber
Backbone links in large office networks
Virtualized environments where low latency is critical
Its support for DOM/DDM allows IT teams to monitor real-time parameters like temperature, voltage, and optical power, improving network reliability and uptime.
The FS SFP-10GSR-85 10G Module is widely used in telecom infrastructure for OBSAI and CPRI (Common Public Radio Interface) links, enabling high-speed connectivity between baseband units (BBUs) and remote radio heads (RRHs). Key advantages include:
Compliance with IEEE 802.3ae 10GBASE-SR/SW for standard telecom deployments
Support for 10Gbps fronthaul links in 4G and 5G networks
Compact, hot-swappable form factor ideal for dense telecom racks
For mobile network operators, OBSAI/CPRI compliant SFP+ modules like the SFP-10GSR-85 ensure consistent, low-latency transport for radio signals. They are compatible with international telecom standards, making them suitable for deployment in global data centers and base stations, supporting both existing LTE and upcoming 5G infrastructures.
The SFP-10GSR-85 10GBASE-SR transceiver, as outlined in its datasheet, delivers reliable 10Gbps connectivity for multimode fiber networks. Designed for 10GBASE-SR/SW, OBSAI, and CPRI applications, it combines high-speed performance, low power consumption, and digital optical monitoring (DOM/DDM) for real-time network telemetry. This section summarizes its key technical specifications and performance metrics.

The SFP-10GSR-85 uses a limiting receiver design and is fully compliant with SFF-8431, SFF-8432, and IEEE 802.3ae standards. Its functional block diagram illustrates the integration of the VCSEL transmitter, limiting receiver, and diagnostic interface for seamless interoperability in multivendor environments.
| Parameter | Symbol | Unit | Min | Max |
|---|---|---|---|---|
| Storage Temperature Range | Ts | °C | -40 | 85 |
| Relative Humidity | RH | % | 0 | 85 |
| Supply Voltage | Vcc | V | -0.3 | 4.0 |
These absolute limits ensure safe storage and handling of the module.
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Form Factor | – | SFP+ | – | – |
| Data Rate | Gb/s | 9.953 | – | 10.3125 |
| Applications | – | 10GBASE-SR/SW, OBSAI, CPRI | – | – |
| Optical Receptacle | – | LC | – | – |
| Fiber Type | – | MMF (50/125 µm) | – | – |
| Fiber Distance | km | – | 0.3 | – |
| Power Consumption | W | – | – | 1 |
| Operating Case Temperature | °C | 0 | – | 70 |
| DDM Calibration Type | – | Inside Calibration | – | – |
| IIC Clock Frequency | kHz | 100 | – | 400 |
| IIC Clock Stretching | µs | – | – | 500 |
| IIC Data Hold Time | ns | 300 | – | – |
This ensures optimal performance across typical network environments and geographic regions.
The SFP-10GSR-85 operates reliably across a wide temperature and voltage range, ensuring stable 10Gbps performance over multimode fiber. The following table summarizes its key electrical specifications:
| Parameter | Symbol | Unit | Min | Typ | Max | Description |
|---|---|---|---|---|---|---|
| Supply Voltage | V | V | 3.135 | 3.30 | 3.465 | Nominal operating voltage |
| Supply Current | I | mA | – | – | 300 | Typical current consumption |
| Maximum Sustained Peak Current (<500ms) | – | mA | – | – | 600 | Short-duration peak current tolerance |
| Input Differential Impedance | – | Ω | – | 100 | – | Differential input characteristic impedance |
| Differential Data Input Swing | – | mV | 300 | – | 1200 | Voltage swing of input differential signal |
| Differential Data Output Swing | – | mV | 300 | – | 700 | Voltage swing of output differential signal |
| LOS Squelch | – | – | Yes | – | – | Loss-of-signal detection active |
| Tx Fault, LOS Output Voltage High | – | V | 2.0 | – | VCC | Logic high output for Tx fault/LOS |
| Tx Fault, LOS Output Voltage Low | – | V | VEE | – | VEE+0.8 | Logic low output for Tx fault/LOS |
| Tx Disable (VIL) | – | V | 2.0 | – | VCC | Input low voltage to disable transmitter |
| Tx Disable (VIH) | – | V | VEE | – | VEE+0.8 | Input high voltage to disable transmitter |
Notes:
The 10GBASE-SR module is tested over -40°C to +85°C, ensuring wide environmental compatibility.
Designed for 10.3125 Gb/s data rate, suitable for 10GBASE-SR/SW, OBSAI, and CPRI applications.
Electrical parameters comply with SFP+ MSA and IEEE 802.3ae standards, ensuring interoperability in multivendor networks.
The SFP-10GSR-85 features high-performance VCSEL optics for 10GBASE-SR applications, delivering reliable signal integrity and link stability over multimode fiber. Key optical parameters are summarized below:
| Parameter | Unit | Min | Typ | Max | Description |
|---|---|---|---|---|---|
| Transmitter Laser Type | – | – | VCSEL | – | 850 nm vertical-cavity surface-emitting laser |
| Output Average Power | dBm | -6.0 | – | -1 | Average optical power emitted by the transmitter |
| Center Wavelength | nm | – | 850 | – | Nominal wavelength for 10G transmission |
| Wavelength Range | nm | 840 | – | 860 | Operational wavelength tolerance |
| Spectral Width | nm | – | – | 0.45 | Full width at half maximum of the laser spectrum |
| Extinction Ratio (ER) | dB | 3 | – | – | Ratio of optical '1' to '0' power |
| Eye Mask Margin | – | – | – | IEEE 802.3-2005 Compliant | Eye safety and signal quality compliance |
| Transmitter & Dispersion Penalty (TDP) | dB | – | – | 3.9 | Total penalty from dispersion and transmitter |
| RIN12OMA | dB/Hz | – | – | -128 | Relative intensity noise at 12 dB OMA |
| Optical Power for TX Disable | dBm | – | – | -40 | Optical output when transmitter is disabled |
| Optical Return Loss Tolerance | dB | – | – | 12 | Maximum allowable reflection back to transmitter |
| Receiver Operating Wavelength | nm | 840 | – | 860 | Receiver wavelength range |
| Receiver Sensitivity | dBm | – | – | -11.1 | Minimum optical power for error-free detection |
| Receiver Saturation Power | dBm | -1 | – | – | Maximum input power without distortion |
| Maximum Input Power | dBm | – | – | 0.5 | Absolute maximum optical input |
| LOS Assert / De-assert Thresholds | dBm | -25 / - | – | -12.5 | Loss-of-signal detection thresholds |
| LOS Hysteresis | dB | 0.5 | – | 6 | Difference between assert and de-assert |
| Optical Return Loss | dB | – | – | 12 | Maximum reflection tolerated at receiver input |
Notes:
Tested for operation at 0°C to +70°C, ensuring compatibility with standard data center and enterprise environments.
Supports 10.3125 Gb/s data rate with 300 m reach over OM3/OM4 multimode fiber.
Fully compliant with SFF-8431, SFF-8432, IEEE 802.3ae, enabling multivendor interoperability.
The SFP-10GSR-85 10GBASE-SR SFP module uses a 20-pin SFP+ interface designed for seamless integration with host devices. The interface provides transmitter and receiver grounds, differential data signals, laser control, and a digital diagnostic I²C interface for monitoring. Key pins and functions are summarized below:
| Pin Number | Symbol | Name | Description |
|---|---|---|---|
| 1, 17, 20 | VeeT | Transmitter Signal Ground | Connect to signal ground on the host board. |
| 2 | TX Fault | Transmitter Fault Out (OC) | Logic “1” = Laser Fault; Logic “0” = Normal operation. Open collector, pull up to Host Vcc with 10 kΩ. |
| 3 | TX Disable | Transmitter Disable In (LVTTL) | Logic “1” or no connection = Laser off; Logic “0” = Laser on. Internally pulled up to VccT with 10 kΩ. |
| 4 | SDA | Serial Data (I²C) | Module definition and SFF-8472 diagnostics; pull-up to Host Vcc with 10 kΩ. |
| 5 | SCL | Serial Clock (I²C) | Clock line for digital diagnostics interface. |
| 6 | MOD-ABS | Module Absent | Indicates module presence to host. |
| 7 | RS0 | Receiver/Transmitter Rate Select (LVTTL) | Internal 30 kΩ pull-down; does not affect module performance. |
| 8 | LOS | Loss of Signal Out (OC) | Logic “0” = sufficient optical signal; Logic “1” = insufficient optical signal; pull-up to Host Vcc with 10 kΩ. |
| 9 | RS1 | Receiver/Transmitter Rate Select (LVTTL) | Same as RS0, secondary rate select pin. |
| 10, 11, 14 | VeeR | Receiver Signal Ground | Connect to signal ground on host board. |
| 12 | RD- | Receiver Negative DATA Out | Logic “0” output, AC coupled and series terminated with 50Ω resistor. |
| 13 | RD+ | Receiver Positive DATA Out | Logic “1” output, AC coupled and series terminated with 50Ω resistor. |
| 15 | VccR | Receiver Power Supply | Connect to filtered +3.3V host supply. |
| 16 | VccT | Transmitter Power Supply | Connect to filtered +3.3V host supply. |
| 18 | TD+ | Transmitter Positive DATA In | Logic “1” input, AC coupled, terminated with differential 100Ω resistor. |
| 19 | TD- | Transmitter Negative DATA In | Logic “0” input, AC coupled, terminated with differential 100Ω resistor. |
Notes:
Pins VeeT/VeeR ensure proper grounding and signal integrity.
TX Fault / TX Disable provide safe laser control and fault reporting.
SDA/SCL enable real-time digital diagnostic monitoring (DOM/ DDMI) per SFF-8472 standard.
Differential data pairs (TD+/TD-, RD+/RD-) support 10G high-speed transmission over multimode fiber.
Diagram reference: LS-MM8510-S3C Drawing (PDF)
The SFP-10GSR-85 supports standard SFP+ application schematics suitable for:
Data center uplinks: High-density top-of-rack (ToR) or end-of-row (EoR) switch interconnects.
Enterprise wiring closets: Reliable 10G Ethernet links for server-to-switch or switch-to-switch connections.
Telecom fronthaul links: OBSAI and CPRI compliant connections for radio access networks (RAN) and baseband units.
This module ensures:
Signal integrity for high-speed 10Gbps transmission.
Low latency operation for enterprise and carrier-grade networks.
Multi-vendor interoperability for seamless integration in heterogeneous network environments.
Integration Tip: The SFP-10GSR-85 follows the SFP+ MSA SFF-8431/8432 standards, making it fully compatible with most 10G switches and routers from vendors such as Cisco, Juniper, HPE, Arista, and Dell.
The SFP-10GSR-85 implements Digital Diagnostic Monitoring (DDM) in accordance with SFF-8472, enabling real-time visibility into transceiver operating conditions through a standard 2-wire I²C interface.
Address 0xA0: Module identification and static parameters
Address 0xA2: Diagnostic monitoring data and alarm thresholds
This separation follows industry-standard SFP+ memory architecture, ensuring interoperability across compliant host platforms.
The 10G SFP module continuously reports and evaluates key operational metrics, including:
Module temperature
Supply voltage
Laser bias current
Transmitted (Tx) optical power
Received (Rx) optical power
Each parameter supports high/low alarm and warning thresholds, allowing proactive fault detection before link degradation or service interruption occurs.
The SFP-10GSR-85 further supports:
Soft Tx-Disable – Remote laser shutdown via host control
Soft Tx-Fault – Software-readable transmitter fault indication
Soft Rx-LOS – Programmable loss-of-signal reporting
These enhanced diagnostic functions enable centralized monitoring and remote management, which is particularly valuable in large-scale data centers, enterprise networks, and telecom deployments where physical access to equipment is limited.
Operational Insight:
By leveraging standardized DDM telemetry, network operators can improve link stability, reduce mean time to repair (MTTR), and maintain predictable 10G Ethernet performance across multi-vendor environments.
The SFP-10GSR-85 is built in a standard SFP+ hot-pluggable form factor, enabling rapid installation, replacement, and maintenance without network downtime. Its mechanical and electrical design fully aligns with industry-recognized specifications to ensure broad interoperability.
Form Factor: SFP+ hot-pluggable module
MSA Standards: SFF-8431, SFF-8432
Ethernet Standards: IEEE 802.3ae 10GBASE-SR / 10GBASE-SW
Environmental Compliance: RoHS 2.0 compliant
Operating Case Temperature: 0°C to 70°C (commercial grade)
Power Dissipation: < 1 W, optimized for high-density deployments
With low power consumption and stable thermal performance, the SFP-10GSR-85 SFP Module Datasheet specifies a module engineered for reliable, long-term operation in diverse global networking environments. It is well suited for data centers, enterprise wiring closets, and telecom access or fronthaul applications, where efficiency, standards compliance, and predictable performance are critical.
To ensure predictable interoperability and long-term operational stability, the SFP-10GSR-85 Datasheet is supported by a comprehensive validation and test program. Each transceiver undergoes compatibility, performance, and reliability verification in controlled lab environments before release.

Each SFP-10GSR-85 10G transceiver is validated in host systems as part of an Assured Compatibility Program, confirming interoperability across 200+ networking platforms.
Validated environments include:
Cisco Ethernet switches and routers
Arista data center switching platforms
Juniper enterprise and service provider systems
Testing focuses on correct EEPROM recognition, link initialization, DOM visibility, and stable traffic forwarding under standard operating conditions. This reduces the risk of vendor lock-in issues or firmware-related incompatibilities in multi-vendor networks.
Performance validation is conducted using advanced optical and electrical test equipment to verify compliance with IEEE 802.3ae 10GBASE-SR requirements and SFP+ MSA specifications.
Using integrated test systems with 4-channel BERT, sampling oscilloscopes, and variable optical attenuators, the following parameters are measured and verified:
Eye pattern integrity (jitter, mask margin)
Average optical output power
Optical modulation amplitude (OMA)
Extinction ratio
Receiver sensitivity
Bit error rate (BER) performance curves
These measurements ensure stable error-free transmission at 10.3125 Gb/s over supported multimode fiber links.
Transceivers are subjected to controlled thermal cycling in environmental chambers to validate reliability under temperature stress:
Commercial grade: 0°C to 70°C
Extended grade: –5°C to 85°C
Industrial grade: –40°C to 85°C
This testing verifies optical and electrical stability across temperature transitions, helping prevent intermittent link failures in real-world deployments.
Actual traffic throughput and protocol compatibility are validated using Network Master Pro test platforms across multiple transport standards:
Ethernet
Fibre Channel
SDH / SONET
CPRI
This ensures that the SFP-10GSR-85 performs consistently not only in Ethernet environments but also in telecom and fronthaul use cases where protocol accuracy is critical.
Optical spectrum analyzers are used to verify compliance with industry optical standards, including:
Center wavelength accuracy and stability
Optical signal-to-noise ratio (OSNR)
Side-mode suppression ratio (SMSR)
Spectral width
Spectrum evaluation confirms that the VCSEL transmitter meets required performance margins for short-reach multimode fiber applications.
Validation Summary:
Through structured compatibility, performance, and reliability testing, the FS SFP-10GSR-85 Datasheet demonstrates compliance with industry standards and predictable behavior across diverse deployment environments, from data centers to enterprise and telecom networks.

The FS SFP-10GSR-85 10GBASE-SR SFP+ transceiver is a standards-compliant optical module designed for high-speed Ethernet networks over multimode fiber. It is widely used in data center uplinks, enterprise wiring closets, and telecom fronthaul links. For procurement clarity and network planning, the table below summarizes the available part number:
| Part Number | Description |
|---|---|
| SFP-10GSR-85 | 10GBASE-SR SFP+ 850nm 300m DOM Transceiver |
This module supports 10.3125 Gbps operation and adheres to SFP+ MSA and IEEE 802.3ae specifications, providing reliable, low-power connectivity for short-reach fiber links.
For customers seeking a compatible alternative or flexible sourcing strategy, LINK-PP offers a functionally equivalent 10GBASE-SR SFP+ module that matches the optical profile of the SFP-10GSR-85 while providing broad interoperability and cost effectiveness.
LINK-PP Compatible Product:
👉 LS-MM8510-S3C – 10GBASE-SR SFP+ 850nm DOM Transceiver
Supports up to 300 meters on 50/125 µm multimode fiber
Includes DOM (Digital Optical Monitoring) support
Designed for standard SFP+ platforms and multivendor networks
📌 Product Page:
https://www.l-p.com/products/476060.htm
📌 Mechanical Drawing & Datasheet (PDF):
https://www.l-p.com/file/datasheet/ls-mm8510-s3c.pdf
These links provide detailed mechanical dimensions, optical/electrical specifications, and installation guidance to assist network architects and procurement teams in planning fiber optic deployments.
In addition to SR grade transceivers, LINK-PP and FS offer a comprehensive range of 10G SFP+ optics tailored to different reach requirements and network standards:
| Part Number | Reach / Application |
|---|---|
| SFP-10GSR-85 | 300m on MMF (850nm) |
| SFP-10GLRM-31 | 220m on MMF (1310nm) |
| SFP-10GLR-31 | 10km on SMF (1310nm) |
| SFP-10GER-55 | 40km on SMF (1550nm) |
| SFP-10GZR-55 | 80km on SMF (1550nm) |
This extended portfolio allows network designers to choose the appropriate transceiver based on link budget, fiber type, and architectural requirements.
When specifying optical transceivers for production networks, a structured procurement approach helps reduce compatibility risks and long-term operational costs:
Validate compatibility against your switch vendor’s official optics matrix—especially for platforms from Cisco, Arista, Juniper, and Dell—to avoid firmware-level restrictions or EEPROM recognition issues.
Review mechanical drawings (PDF datasheets) to confirm form factor alignment, PCB clearances, and port density requirements before large-scale deployment.
For high-volume or multi-site rollouts, consider stocking both OEM and LINK-PP compatible modules from the LINK-PP Official Store. This strategy reduces vendor lock-in, improves supply chain resilience, and maintains consistent network performance across mixed environments.
💡 Best Practice: Enterprises and data center operators often standardize on LINK-PP compatible optics for access and aggregation layers, while reserving OEM modules for core or warranty-sensitive infrastructure.