Ascent’s QSFP28-100G-LP40 is a 100Gb/s transceiver module designed for optical communication applications compliant to Ethernet 100GBASE-ER4 Lite standard. The module converts 4 input channels of 25Gb/s electrical data to 4 channels of LAN WDM optical signals and then multiplexes them into a single channel for 100Gb/s optical transmission. Reversely on the receiver side, the module de- multiplexes a 100Gb/s optical input into 4 channels of LAN WDM optical signals and then converts them to 4 output channels of electrical data.
• Compliant with 100GBASE-ER4
• Support line rates from 103.125 Gbps to 111.81 Gbps
• Integrated LAN WDM TOSA / APD ROSA for up to 40 km reach with FEC, 30 km without
• Digital Diagnostics Monitoring Interface
• Duplex LC optical receptacle
• No external reference clock
• Electrically hot-pluggable
• Compliant with QSFP28 MSA with LC connector
• Case operating temperature range:0 °C to 70 °C
• Power dissipation < 4.0 W
Note that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
Parameter | Symbol | Min. | Max. | Unit | Notes |
Storage Temperature | TS | ‑40 | 85 | °C | |
Operating Case Temperature | TOP | 0 | 70 | °C | |
Power Supply Voltage | VCC | ‑0.5 | 3.6 | V | |
Relative Humidity (Non‑Condensing) | RH | 0 | 85 | % | |
Damage Threshold, per Lane | THd | ‑3.0 | dBm |
Recommended Operating Conditions and Power Supply Requirements
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Operating Case Temperature | TOP | 0 | 70 | °C | ||
Power Supply Voltage | VCC | 3.135 | 3.3 | 3.465 | V | |
Data Rate (per Lane) | 25.78125 | Gb/s | ||||
Data Rate Accuracy | ‑100 | 100 | ppm | |||
Control Input Voltage High | 2 | Vcc | V | |||
Control Input Voltage Low | 0 | 0.8 | V | |||
Link Distance with G.652 (without FEC) | D1 | 30 | km | 1 | ||
Link Distance with G.652 (with FEC) | D2 | 40 | km | 1 |
1. Depending on actual fiber loss/km (link distance specified is for fiber insertion loss of 0.4dB/km)
Electrical Characteristics
The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter | Test Point | Min. | Typ. | Max. | Unit | Notes |
Power Consumption | 4.5 | W | ||||
Supply Current | Icc | 1.36 | A | |||
Transmitter (per Lane) | ||||||
Overload Differential Voltage pk‑pk | TP1a | 900 | mV | |||
Common Mode Voltage (Vcm) | TP1 | ‑350 | 2850 | mV | 1 | |
Differential Termination Resistance Mismatch | TP1 | 10 | % | At 1 MHz | ||
Differential Return Loss (SDD11) | TP1 | See CEI‑ 28G‑VSR Equation 13‑19 | dB | |||
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11) | TP1 | See CEI‑ 28G‑VSR Equation 13‑20 | dB | |||
Stressed Input Test | TP1a | See CEI‑ 28G‑VSR Section 13.3.11.2.1 | ||||
Receiver (per Lane) | ||||||
Differential Voltage, pk‑pk | TP4 | 900 | mV | |||
Common Mode Voltage (Vcm) | TP4 | ‑350 | 2850 | mV | 1 | |
Common Mode Noise, RMS | TP4 | 17.5 | mV | |||
Differential Termination Resistance Mismatch | TP4 | 10 | % | At 1 MHz | ||
Differential Return Loss (SDD22) | TP4 | See CEI‑ 28G‑VSR Equation 13‑19 | dB | |||
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC22, SCD22) | TP4 | See CEI‑ 28G‑VSR Equation 13‑21 | dB | |||
Common Mode Return Loss (SCC22) | TP4 | ‑2 | dB | 2 | ||
Transition Time, 20 to 80% | TP4 | 9.5 | ps | |||
Vertical Eye Closure (VEC) | TP4 | 5.5 | dB | |||
Eye Width at 10‑15 probability (EW15) | TP4 | 0.57 | UI | |||
Eye Height at 10‑15 probability (EH15) | TP4 | 228 | mV |
Notes:
1. Vcm is generated by the host. Specification includes effects of ground offset voltage.
2. From 250 MHz to 30 GHz.
Optical Characteristics
Ethernet 100GBASE‑ER4 Lite | ||||||
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Lane Wavelength | L0 | 1294.53 | 1295.56 | 1296.59 | nm | |
L1 | 1299.02 | 1300.05 | 1301.09 | nm | ||
L2 | 1303.54 | 1304.58 | 1305.63 | nm | ||
L3 | 1308.09 | 1309.14 | 1310.19 | nm | ||
Transmitter | ||||||
SMSR | SMSR | 30 | dB | |||
Total Average Launch Power | PT | 10.5 | dBm | |||
Average Launch Power (per Lane) | PAVG | ‑2.9 | 4.5 | dBm | 1 | |
OMA (per Lane) | POMA | 0.1 | 4.5 | dBm | 2 | |
Difference in Launch Power Between Any Two Lanes (OMA) | Ptx, diff | 3.6 | dB | |||
Launch Power in OMA Minus Transmitter and Dispersion Penalty (TDP) (per Lane) | ‑0.65 | dBm | ||||
TDP (per Lane) | TDP | 2.5 | dB | |||
Extinction Ratio | ER | 7 | dB | |||
RIN20OMA | RIN | ‑130 | dB/Hz | |||
Optical Return Loss Tolerance | TOL | 20 | dB | |||
Transmitter Reflectance | RT | ‑12 | dB | |||
Average Launch Power OFF Transmitter (per Lane) | Poff | ‑30 | dBm | |||
Eye Mask {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | |||||
Receiver | ||||||
Damage Threshold (per Lane) | THd | ‑3.0 | dBm | 3 | ||
Average Receive Power (per Lane) | ‑16.9 | ‑4.9 | dBm | For 30 km link distance | ||
Average Receive Power (per Lane) | ‑20.9 | ‑4.9 | dBm | For 40 km link distance | ||
Receive Power (OMA) (per Lane) | ‑1.9 | dBm | ||||
Receiver Sensitivity (OMA) (per Lane) | SEN1 | ‑14.65 | dBm | For BER = 1x10‑12 | ||
Stressed Receiver Sensitivity (OMA) (per Lane) | ‑12.65 | dBm | For BER = 1x10‑12 | |||
Receiver Sensitivity (OMA) (per Lane) | SEN2 | ‑18.65 | dBm | For BER = 5x10‑5 | ||
Stressed Receiver Sensitivity (OMA) (per Lane) | ‑16.65 | dBm | For BER = 5x10‑5 | |||
Receiver Reflectance | ‑26 | dB | ||||
Difference in Receive Power between any Two Lanes (Average and OMA) | Prx, diff | 3.6 | dB | |||
LOS Assert | LOSA | ‑26 | dBm | |||
LOS De‑Assert | LOSD | ‑24 | dBm | |||
LOS Hysteresis | LOSH | 0.5 | dB | |||
Receiver Electrical 3 dB Upper Cutoff Frequency (per Lane) | Fc | 31 |
GHz | |||
Conditions of Stress Receiver Sensitivity Test (Note 4) | ||||||
Vertical Eye Closure Penalty (per Lane) | 1.5 | dB | ||||
Stressed Eye J2 Jitter (per Lane) | 0.3 | UI | ||||
Stressed Eye J9 Jitter (per Lane) | 0.47 | UI |
Notes:
1. The minimum average launch power spec is based on ER not exceeding 9.5dB and transmitter OMA higher than 0.1dBm.
2. Even if the TDP < 0.75 dB, the OMA min must exceed the minimum value specified here.
3. The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input signal having this power level on one lane. The receiver does not have to operate correctly at this input power.
4. Vertical eye closure penalty, stressed eye J2 jitter, and stressed eye J9 jitter are test conditions for measuring stressed receiver sensitivity. They are not characteristics of the receiver.
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