ASCENT’s QSFP+ Series are designed for use in 40 Gigabit per second links over multimode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-SR4.
• High channel capacity: 40 Gbps per module
• Up to 11.1 Gbps data rate per channel
• 100 m links on OM3 multi-mode fiber
• 150 m links on OM4 multi-mode fiber
• High reliability 850 nm VCSEL technology
• Hot-pluggable
• Digital diagnostic SFF-8436 compliant
• Power dissipation < 0.7 W
• ROHS, FCC complaint
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
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 | ||
Damage threshold | 3.4 | dBm |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Case Operating Temperature | Tcase | 0 | ‑ | 70 | °C | Without air flow |
Power Supply Voltage | VCC | 3.14 | 3.3 | 3.46 | V | |
Power Supply Current | ICC | ‑ | 200 | mA | ||
Data Rate | BR | 10.3125 | Gbps | Each channel | ||
Transmission Distance | TD | ‑ | 100 | m | OM3 MMF | |
150 | m | OM4 MMF |
Optical Characteristics
Parameter | Symbol | Min | Typ. | Max | Unit | Note |
Transmitter | ||||||
Center Wavelength | λ0 | 840 | 860 | nm | ||
Average Launch Power Each Lane | ‑7.6 | 1.0 | dBm | |||
Spectral Width (RMS) | σ | 0.65 | nm | |||
Optical Extinction Ratio | ER | 3 | dB | |||
Average Launch Power Off Each Lane | Poff | ‑30 | dBm | |||
Transmitter and Dispersion Penalty Each Lane | TDP | 3.5 | dB | |||
Optical Return Loss Tolerance | ORL | 12 | dB | |||
Output Eye Mask | Compliant with IEEE 802.3ba-2010 | |||||
Receiver | ||||||
Receiver Wavelength | λin | 840 | 860 | nm | ||
Rx Sensitivity per Lane | RSENS | ‑11.1 | dBm | 1 | ||
Input Saturation Power (Overload) | Psat | 2.4 | dBm | |||
Receiver Reflectance | Rr | ‑12 | dB | |||
LOS De‑Assert | LOSD | ‑12 | dBm | |||
LOS Assert | LOSA | ‑30 | dBm | |||
LOS Hysteresis | 0.5 | dBm |
Notes:
1. Measured with a PRBS 231‑1 test pattern, @10.325 Gb/s, BER<10‑12.
Electrical Characteristics
Parameter | Symbol | Min | Typ. | Max | Unit | Note |
Supply Voltage | Vcc | 3.14 | 3.3 | 3.46 | V | |
Supply Current | Icc | 200 | mA | |||
Transmitter | ||||||
Input Differential Impedance | Rin | 100 | Ω | 1 | ||
Differential Data Input Swing | Vin, pp | 180 | 1000 | mV | ||
Single‑Ended Input Voltage Tolerance | VinT | ‑0.3 | 4.0 | V | ||
Receiver | ||||||
Differential Data Output Swing | Vout, pp | 300 | 850 | mV | 2 | |
Single‑Ended Output Voltage | ‑0.3 | 4.0 | V |
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Into 100 Ω differential termination.
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