Ascent’s SFPP-28-LP-85-01 SFP28 transceiver is an integrated fiber optic transceiver that provides a high-speed serial link at signaling rates up to 28 Gb/s. The module complies with SFF-8431 and SFF 8472standards. It is suitable for 25G Ethernet applications and has a transmission distance of up to 70 m on OM3 and 100 m on OM4 multi-mode fibers.
• Up to 70 m transmission distance on OM3
• Up to 100 m transmission distance on OM4
• VSCEL laser and PIN receiver
• Metal enclosure, for lower EMI
• 2-wire interface with integrated Digital Diagnostic monitoring
• Hot-pluggable SFP+ footprint
• Specifications compliant with SFF 8431 and SFF 8472
• Compliant with SFP+ MSA with LC connector
• Single 3.3 V power supply
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Storage Temperature | Ts | ‑40 | ‑ | 85 | °C | |
Relative Humidity | RH | 5 | ‑ | 95 | % | |
Power Supply Voltage | VCC | ‑0.3 | ‑ | 4 | V | |
Signal Input Voltage | Vcc‑0.3 | ‑ | Vcc+0.3 | V |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Case Operating Temperature | Tcase | 0 | ‑ | 70 | °C | Commercial |
Power Supply Voltage | VCC | 3.14 | 3.3 | 3.47 | V | |
Power Supply Current | ICC | ‑ | 300 | mA | ||
Data Rate | BR | 25.78 | Gbps | |||
Transmission Distance | TD | ‑ | 100 | m | OM4 or 70 m OM3 | |
Coupled fiber | Multi‑mode fiber |
Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Transmitter | ||||||
Output Optical Power | POUT | ‑9.1 | 2.4 | dBm | 1 | |
Optical Wavelength | λ | 840 | 850 | 860 | nm | |
Spectral Width (RMS) | σ | 0.6 | nm | |||
Optical Extinction Ratio | ER | 3.0 | dB | |||
RIN | RIN | ‑128 | dB/Hz | |||
Receiver | ||||||
Rx Sensitivity | RSENS | ‑11 | dBm | 2 | ||
Input Saturation Power (Overload) | PSAT | 2.4 | dBm | |||
Wavelength Range | λC | 770 | 850 | 860 | nm | |
LOS De‑Assert | LOSD | ‑13 | dBm | |||
LOS Assert | LOSA | ‑30 | dBm | |||
LOS Hysteresis | 0.5 | dB |
Notes:
1. Class 1 Laser Safety per FDA/CDRH and IEC‑825‑1 regulations.
2. Measured with a PRBS 231 ‑ 1 test pattern, @25.78Gb/s, BER<10‑5.
Electrical Characteristics
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Supply Voltage | VCC | 3.14 | 3.3 | 3.46 | V | |
Supply Current | ICC | 300 | mA | |||
Transmitter | ||||||
Input Differential Impedance | Rin | 100 | Ω | 1 | ||
Single Ended Data Input Swing | Vin, pp | 180 | 700 | mV | ||
Transmit Disable Voltage | VD | Vcc‑1.3 | Vcc | V | ||
Transmit Enable Voltage | VEN | Vee | Vee+0.8 | V | 2 | |
Receiver | ||||||
Differential data output swing | Vout, pp | 300 | 850 | mV | 3 | |
LOS Fault | VLOSfault | Vcc‑1.3 | VccHOST | V | 4 | |
LOS Normal | VLOSnorm | Vee | Vee+0.8 | V | 4 |
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Or open circuit.
3. Into 100 Ω differential termination.
4. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
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