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We get these for work in our data centers and find the price cannot be beat. The customer service is excellent and we get them quickly.
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FluxLight's GLC-SX-MMD-FL is a Cisco® compatible 1000Base SFP Optical Transceiver and is factory pre-programmed with all the necessary configuration data for seamless network integration. Our transceivers perform identically to Cisco® original transceivers and are 100% compatible with other OEM and third party transceivers. The Cisco GLC-SX-MMD-FL transceiver is 100% MSA (Multi-Source Agreement) compliant. All FluxLight's transceivers are tested for 100% functionality and guaranteed compatible for outstanding network performance.
FluxLight offers all brands and form factors of Optical Transceivers for all your networking needs. Now you have a reliable, compatible and affordable means to expand your network while maintaining its integrity.
The operation in excess of any absolute maximum ratings might cause permanent damage to this module.
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Storage Temperature | TS | -40 | 85 | °C |
| Operating Case Temperature | TOP | -5 | 85 | °C |
| Power Supply Voltage | VCC | -0.3 | 3.6 | V |
| Relative Humidity (non-condensation) | RH | 5 | 85 | % |
| Parameter | Symbol | Min | Typical | Max | Unit |
|---|---|---|---|---|---|
| Operating Case Temperature | TOP | -5 | 85 | °C | |
| Power Supply Voltage | VCC | 3.135 | 3.3 | 3.465 | V |
| Power Consumption | 1 | W | |||
| Data Rate | DR | 1.25 | Gbps | ||
| Link Distance with MMF | D | 550 | m |
| Parameter | Symbol | Min | Typical | Max | Unit |
|---|---|---|---|---|---|
| Transmitter | |||||
| Center Wavelength | λC | 840 | 850 | 860 | nm |
| RMS Spectral Width | λrms | 0.85 | nm | ||
| Average Launch Power | PAVG | -9 | -3 | dBm | |
| Rise/Fall Time | Tr/Tf | 260 | ps | ||
| Extinction Ratio | ER | 9 | dB | ||
| Transmitter Eye Mask | Compliant with IEEE 802.3 standard | ||||
| Receiver | |||||
| Center Wavelength | λC | 770 | 860 | nm | |
| Damage Threshold | THd | 0 | dBm | ||
| Receiver Sensitivity | SEN | -17 | dBm | ||
| LOS Assert | LOSA | -35 | dBm | ||
| LOS De-Assert | LOSD | -18 | dBm | ||
| LOS Hysteresis | LOSH | 0.5 | dB | ||

The following digital diagnostic characteristics are defined over the normal operating conditions unless otherwise specified.
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Temperature monitor absolute error | DMI_Temp | -5 | 5 | °C |
| Supply voltage monitor absolute error | DMI_VCC | -0.1 | 0.1 | V |
| RX power monitor absolute error | DMI_RX | -3 | 3 | dB |
| Bias current monitor absolute error | DMI_Ibias | -10% | 10% | mA |
| TX power monitor absolute error | DMI_TX | -3 | 3 | dB |


| Pin | Signal Name | Description | Plug Seq. | Notes |
|---|---|---|---|---|
| 1 | VeeT | Transmitter Ground | 1 | 1 |
| 2 | TX FAULT | Transmitter Fault Indication | 3 | |
| 3 | TX DISABLE | Transmitter Disable | 3 | 2 |
| 4 | SDA | SDA Serial Data Signal | 3 | 3 |
| 5 | SCL | SCL Serial Clock Signal | 3 | 3 |
| 6 | MOD_ABS | Module Absent. Grounded within the module | 3 | 3 |
| 7 | RS0 | Not Connected | 3 | 4 |
| 8 | LOS | Loss of Signal | 3 | 5 |
| 9 | RS1 | Not Connected | 3 | 4 |
| 10 | VeeR | Receiver ground | 1 | 1 |
| 11 | VeeR | Receiver ground | 1 | 1 |
| 12 | RD- | Inv. Received Data Out | 3 | 6 |
| 13 | RD+ | Received Data Out | 3 | 6 |
| 14 | VeeR | Receiver ground | 1 | 1 |
| 15 | VCCR | Receiver Power Supply | 2 | |
| 16 | VCCT | Transmitter Power Supply | 2 | |
| 17 | VeeT | Transmitter Ground | 1 | |
| 18 | TD+ | Transmit Data In | 3 | 6 |
| 19 | TD- | Inv. Transmit Data In | 3 | 6 |
| 20 | VeeT | Transmitter Ground | 1 |
This transceiver is specified as ESD threshold 1kV for high-speed data pins and 2kV for all other electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.
This is a Class 1 Laser Product according to IEC 60825-1:2007. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007).
The following is a list of Finisar Corporation patents Fluxlight has licensed. This licensure recognizes and compensates Finisar for their intellectual property. The GLC-SX-MMD-FL, like all Fluxlight optical transceivers, is covered by this license agreement. Therefore, Fluxlight customers can rest assured that all products purchased are fully licensed, and our customers are under no potential liability that may ensue from the use of unlicensed optical transceiver products.
U.S. Patent Numbers: 7,184,668 (System and method of protecting eye safety during operation of a fiber optic transceiver), 7,079,775 (Integrated memory mapped controller circuit for fiber optics transceiver), 6,957,021 (Optical transceiver with memory mapped locations), 7,058,310 (System and method for protecting eye safety during operation of a fiber optic transceiver), 6,952,531 (System and method for protecting eye safety during operation of a fiber optic transceiver), 7,162,160 (System and method for protecting eye safety during operation of a fiber optic transceiver), 7,050,720 (Integrated memory mapped controller circuit for fiber optics transceiver)
Original Equipment Manufacturer (OEM) names may be registered trademarks of the respective OEM, and the OEM has neither authorized nor sponsored the use of its trademark or trade name. All OEM names are used for cross reference/comparative purposes only.
This part is covered by our Limited Lifetime Warranty, a 10-year serviceable lifetime, and our 30-Day Money-Back Guarantee. Read the full warranty and return terms.
We get these for work in our data centers and find the price cannot be beat. The customer service is excellent and we get them quickly.
We use hundreds of these optics with over 99% of them still functioning after 5+ years.
We've used the optics for many years, hundreds of them and have had less than 1% failure over many years.
So I keep coming back
FluxLight is the best! I’ve bought many of these transceivers and never had any issues. I don’t buy anything else. They perform flawlessly in Cisco equipment.
Another great optic from Fluxlight. Been using them for a couple of years, and no duds yet. Will order again.
Compatible, shipped quickly, and a great price.
FluxLight components have been part of my IT strategy for years. The products have been 100% reliable, their pricing is extremely competitive and their service is top notch.
no complaints about the SFPs. They work great and are cost effective!
These things work great. Much better than the OEM for costs.
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