Cisco Compatible Ethernet Optical Transceiver SFP28 25G 850nm 100m
Cisco Compatible SFP-25G-SR-S SFP28 25G 850nm 100m Ethernet Optical Transceiver
Product Features
● Supports up to 25.78Gb/s bit rates
● Digital Diagnostic Monitor Interface with SFF-8472
● Hot plug-gable SFP28 footprint
● 850nm VCSEL transmitter
● Maximum link length of 70m links on OM3 or 100m links on OM4 multi-mode fiber
● High transmission margin
● Low power consumption<1W
● Operating case temperature: Commerical:0 to 70 °C
Optical Characteristics (TOP(C) = 0 to 70 ℃, VCC = 3.13 to 3.47 V)
| Parameter | Symbol | Min. | Typ | Max. | Unit | Note |
| Transmitter |
| Operating Wavelength | λ | 840 | 850 | 860 | nm | |
| Ave. output power (Enabled) | PAVE | -8.2 | | 2.4 | dBm | |
| Side-Mode Suppression Ratio | SMSR | 30 | | | dB | |
| Extinction Ratio | ER | 2 | | | dB | |
| RMS spectral width(-20dB) | Δλ | | | 1 | nm | |
| Relative Intensity Noise | RIN | | | -130 | dB/Hz | |
| Receiver |
| Operating Wavelength | | 840 | 850 | 860 | nm | |
| Stressed Receiver Sensitivity(OMA) | RsenS | | | -5.2 | dBm | |
| Average Receiver Power | Pimax | -10.3 | | 3 | dBm | 1 |
| LOS Assert | Pa | -30 | | | dBm | |
| LOS De-assert | Pd | | | -12 | dBm | |
| LOS Hysteresis | Pd-Pa | 0.5 | | 5 | dB | |
Notes:
1. Measured at the BER less than 5E-5, back to back. The measure pattern is PRBS 231-1 with worst ER=4.5@ 25.78Gb/s.
Absolute Maximum Ratings
| Parameter | Symbol | Min. | Max. | Unit | Note |
| Supply Voltage | Vcc | -0.5 | 4.0 | V | |
| Storage Temperature | TS | -40 | 85 | °C | |
| Relative Humidity | RH | 0 | 85 | % | |
Note: Stress in excess of the maximum absolute ratings can cause permanent damage to the transceiver.
General Operating Characteristics
| Parameter | Symbol | Min. | Typ | Max. | Unit | Note |
| Data Rate | | | 25.78 | | Gb/s | |
| Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
| Supply Current | Icc | | | 300 | mA | |
| Operating Case Temp. | Tc | 0 | | 70 | °C | |
Electrical Characteristics (TOP(C) = 0 to 70 ℃, VCC = 3.13 to 3.47 V)
| Parameter | Symbol | Min. | Typ | Max. | Unit | Note |
| Transmitter |
| Differential data input swing | VINPP | 120 | | 800 | mVpp | 1 |
| Tx Disable input | H | TDH | 2.0 | | Vcc+0.3 | V | |
| L | TDL | 0 | | 0.8 |
| Tx Fault output | H | TFH | 2.0 | | Vcc+0.3 | V | 2 |
| L | TFL | 0 | | 0.8 |
| Input differential impedance | Rin | | 100 | | Ω | |
| Receiver |
| Differential data output swing | Vout,pp | 340 | 650 | 800 | mVpp | 3 |
| Rx Los Output | H | VOH | 2.0 | | Vcc+0.3 | V | 2 |
| L | VOL | 0 | | 0.8 |
Note:
1. TD+/- are internally AC coupled with 100Ω differential termination inside the module.
2. Tx Fault and Rx LOS are open collector outputs, which should be pulled up with 4.7k to 10kΩ resistors on the host board. Pull up voltage between 2.0V and Vcc+0.3V.
3. RD+/- outputs are internally AC coupled, and should be terminated with 100Ω (differential) at the user SERDES.
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Cisco Compatible Ethernet Optical Transceiver SFP28 25G 850nm 100m Images
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