SFP28 SR 25Gbps 850nm Multimode Fiber Module MMF Up to 100m dual LC fiber
Applications
25GBASE-SR Ethernet
32G Fiber Channel
Other optical lin
PRODUCT FEATURES
Maximum link length of 100m on OM3 MMF and 100m on OM4 MMF
Digital diagnostics functions are available via the I2C interface
Operating case temperature
Commercial: 0°C to +70 °C
+3.3V single power supply
Supports 25.78Gb/s bit rate
850nm VCSEL laser and PIN photo-detector
Power consumption less than 1W
RoHS compliant
Password protection for A0h and A2h
PRODUCT DESCRIPTION
Optical module also be called optical fiber module, the translation should be transceiver module. The function of the optical module is the photoelectric conversion, and the transmitter converts the electrical signal into the optical signal. After the transmission through the optical fiber, the receiving end converts the optical signal into the electrical signal. SFP28 is a kind of optical module.
The 25Gbps 850nm Fiber Optic Module is a multi-rate 850nm transceiver which ensures compliance with 25GBASE-SR specifications. Per the requirements of 25GE, inter-nal clock and data recovery circuits (CDRs) are present on both electrical input and electrical output of this trans-ceiver. These CDRs will lock at 25.78 Gb/s. Digital diagnostic monitoring information (DMI) is present in the 25Gbps 850nm Fiber Optic Module per the requirements of SFF-8472, providing real time monitoring information of transceiver laser, receiver and environment conditions over a SFF-8431 2-wire serial interface
Absolute Maximum Ratings
Table2- Absolute Maximum Ratings
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Supply Voltage | Vcc | -0.5 | - | +3.6 | V | |
| Storage Temperature | Ts | -40 | - | +85 | °C | |
| Operating Humidity | RH | +5 | - | +85 | % | 1 |
Note:
Recommended Operating Conditions
Table 3- Recommended operating Conditions
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Operating Case Temperature | TC | 0 | - | +70 | °C | |
| Power Supply Voltage | Vcc | 3.14 | 3.3 | 3.47 | V | |
| Power Supply Current | Icc | - | - | 300 | mA | |
| Power Dissipation | Pd | - | - | 1.0 | W | |
| Bit Rate | BR | 8.5 | 25.78125 | - | Gbps | |
Electrical Characteristics
Table 4- Electrical Characteristics
| Parameter | Symbol | Min. | Typ. | Max. | Units | Notes |
| Transmitter |
| Differential Data Input Swing | Vin,P-P | 200 | - | 1600 | mVPP | |
| Input Differential Impedance | ZIN | 90 | 100 | 110 | Ω | |
| Tx_Fault | Normal Operation | VOL | 0 | - | 0.8 | V | |
| Transmitter Fault | VOH | 2.0 | - | VCC | V | |
| Tx_Disable | Normal Operation | VIL | 0 | - | 0.8 | V | |
| Laser Disable | VIH | 2.0 | - | VCC+0.3 | V | |
| Receiver |
| Differential Date Output | Vout | 400 | - | 800 | mV | |
| Output Differential Impedance | ZD | 90 | 100 | 110 | Ω | |
| Rx_LOS | Normal Operation | VOL | 0 | - | 0.8 | V | |
| Lose Signal | VoH | 2.0 | - | VCC | V | |
Optical Characteristics
Table 5-Optical Characteristics
| Parameter | Symbol | Unit | Min | Typ | Max | Notes |
| Optical transmitter Characteristics |
| Bit Rate | BR | Gbps | 8.5 | 25.78125 | - | 1 |
| Center Wavelength Range | λc | nm | 820 | 850 | 880 | |
| RMS Spectral Width | Δλ | nm | - | - | 0.6 | |
| Average Launch power Tx_off | Poff | dBm | - | - | -30 | |
| Average Optical Power | P0 | dBm | -5.0 | | 2.4 | 2 |
| Extinction Ratio | ER | dB | 2.0 | - | - | |
| Optical return loss tolerance | ORL | dB | - | - | 12 | |
| Optical Eye Mask | - | % | 5 | - | - | |
| Optical Receiver Characteristics |
| Bit Rate | BR | Gbps | 8.5 | 25.78125 | - | 1 |
| Center Wavelength Range | λc | nm | 820 | - | 880 | |
| Damage threshold | DT | dBm | 3.4 | - | - | |
| Overload Input Optical Power | PIN | dBm | 2.4 | - | - | |
| Receive Sensitivity (Average Power) | - | dBm | - | - | -10.3 | 3 |
| Receive Sensitivity (Average Power) | - | dBm | - | - | -5.2 | 4 |
| LOS De-Assert | LOSD | dBm | - | - | -13 | |
| LOS Assert | LOSA | dBm | -30 | - | - | |
| LOS Hysteresis | LOSH | dB | 0.5 | | | |
Note:
- Set low of RS0/RS1 pin and 0 of RS0/RS1 bit. Engine CDR lock at low bit rate.
Set high of RS0/RS1 pin and 0 of RS0/RS1 bit. Engine CDR lock at high bit rate.
- Coupled into 50/125 MMF.
- BER=5x10-5; PRBS 231-1 @25.78125Gbps.
- BER=1x10-12; PRBS231-1@25.78125Gbps.
Product Tags:
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25Gbps 850nm Multimode Fiber Module , SR SFP Module MMF Up To 100m Dual LC Fiber Images
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