Ascent QSFP+ LR4 is designed to operate over single-mode fiber system using 4X10 CWDM channel in 1310 band and links up to 10km. The module converts 4 inputs channel of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical data.
• 4 CWDM lanes Mux/Demux design
• Up to 11.1Gbps Data rate per wavelength
• Up to 10km transmission on SMF
• Electrically hot-pluggable
• Digital Diagnostics Monitoring Interface
• Compliant with QSFP+ MSA with LC connector
• Case operating temperature range:0°C to 70°C
• Power dissipation < 3.5 W
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 |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Case Operating Temperature | Tcase | 0 | - | 70 | °C | Without air flow |
Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
Power Supply Current | ICC | - | 900 | mA | ||
Data Rate | BR | 10.3125 | Gbps | Each channel | ||
Transmission Distance | TD | - | 10 | km | ||
Coupled fiber | Single mode fiber | 9/125um SMF |
Optical Characteristics
Parameter | Symbol | Min | Typ | Max | Unit | Note |
Transmitter | ||||||
Wavelength Assignment | λ0 | 1264.5 | 1271 | 1277.5 | nm | |
λ1 | 1284.5 | 1291 | 1297.5 | nm | ||
λ2 | 1304.5 | 1311 | 1317.5 | nm | ||
λ3 | 1324.5 | 1331 | 1337.5 | nm | ||
Total Output. Power | POUT | 8.3 | dBm | |||
Average Launch Power Per lane | -7 | 2.3 | dBm | |||
Spectral Width (-20dB) | σ | 1 | nm | |||
SMSR | 30 | dB | ||||
Optical Extinction Ratio | ER | 3.5 | dB | |||
Average launch Power off per lane | Poff | -30 | dBm | |||
Transmitter and Dispersion Penalty | TDP | 2.3 | dB | |||
RIN | RIN | -128 | dB/Hz | |||
Output Eye Mask | Compliant with IEEE 802.3ba | |||||
Receiver | ||||||
Rx Sensitivity per lane(OMA) | RSENS | -11.5 | dBm | 1 | ||
Input Saturation Power (Overload) | Psat | 2.3 | dBm | |||
Receiver Reflectance | Rr | -26 | dB |
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 | 3.13 | 3.3 | 3.47 | V | |
Supply Current | Icc | 900 | mA | |||
Transmitter | ||||||
Input differential impedance | Rin | 100 | Ω | 1 | ||
Differential data input swing | Vin,pp | 180 | 1000 | mV | ||
Transmit Disable Voltage | VD | Vcc–1.3 | Vcc | V | ||
Transmit Enable Voltage | VEN | Vee | Vee+ 0.8 | V | 2 | |
Transmit Disable Assert Time | 10 | us | ||||
Receiver | ||||||
Vout,pp | 300 | 850 | mV | 3 | ||
Data output rise time | tr | 28 | ps | 4 | ||
Data output fall time | tf | 28 | ps | 4 | ||
LOS Fault | VLOS fault | Vcc–1.3 | VccHOST | V | 5 | |
LOS Normal | VLOS norm | Vee | Vee+0.8 | V | 5 | |
Power Supply Rejection | PSR | 100 | mVpp | 6 |
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Or open circuit.
3. Into 100 ohms differential termination.
4. 20 – 80 %.
5. Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
6. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the recommended power supply filtering network.
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