Ascent’s 100G CFP2 LR4 optical Transceiver integrates receiver and transmitter path on one module. In the transmit side, four lanes of serial data streams are recovered, retimed, and passed to four laser drivers. The laser drivers control four EMLs (Electric-absorption Modulated Lasers) with center wavelength of 1296 nm, 1300nm, 1305nm and 1309 nm. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. In the receive side, the four lanes of optical data streams are optically de-multiplexed by the integrated optical de-multiplexer. Each data stream is recovered by a SOA to amplify, then go to PIN photo-detector and trans-impedance amplifier, retimed. This module features a hot-pluggable electrical interface, low power consumption and MDIO management interface.
• Compliant with 100GBASE-ER4
• Support line rates from 103.125 Gbps to 111.81 Gbps
• Integrated LAN WDM EML TOSA, SOA, ROSA for up to 40 km reach over SMF
• Digital Diagnostics Monitoring Interface
• Duplex LC optical receptacle
• No external reference clock
• Single 3.3 V power supply
• Case operating temperature range:0 °C to 70 °C
• Power dissipation < 9W
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 | ||
Receive Input Optical Power (Damage Threshold) | Pdmg | 5.0 | dBm |
Low Speed Electrical Characteristics
Parameter | Symbol | Min.. | Typ. | Max. | Unit | Notes |
Supply Currents and Voltages | ||||||
Voltage | Vcc | 3.2 | 3.3 | 3.4 | V | With Respect to GND |
Supply Current | Icc | 2.3 | A | |||
Power Dissipation | Pwr | 9.0 | W | |||
Power Dissipation (Low Power Mode) | Plp | 2.5 | W | |||
Low Speed Control and Sense Signals, 3.3 V LVCMOS | ||||||
Outputs Low Voltage | VOL | 0.2 | V | IOH=100 μA | ||
Output High Voltage | VOH | Vcc‑0.2 | V | IOH=‑100 μA | ||
Input Low Voltage | VIL | ‑0.3 | 0.8 | V | ||
Input High Voltage | VIH | 2 | Vcc3+0.3 | V | ||
Input Leakage Current | IIN | ‑10 | 10 | μA | ||
Low Speed Control and Sense Signals, 1.2 V LVCMOS | ||||||
Outputs Low Voltage | VOL | ‑0.3 | 0.2 | V | ||
Output High Voltage | VOH | 1.0 | 1.5 | V | ||
Output Low Current | IOL | 4 | mA | |||
Output High Current | IOH | ‑4 | mA | |||
Input Low Voltage | VIL | ‑0.3 | 0.36 | V | ||
Input High Voltage | VIH | 0.84 | 1.5 | V | ||
Input Leakage Current | IIN | ‑100 | 100 | μA | ||
Input Capacitance | C | 10 | pF | |||
MDC Clock Rate | 0.1 | 4 | MHz |
High Speed Electrical Specifications
Parameter | Symbol | Min. | Max. | Unit | Notes |
Transmitter Electrical Input from Host | |||||
Differential Voltage pk‑pk | 100 | 1200 | mV | ||
Common Mode Noise (rms) | 17.5 | mV | |||
Differential Termination Mismatch | 10 | % | |||
Transition Time | 10 | ps | 20/80 % | ||
Common Mode Voltage | ‑0.3 | 2.8 | V | ||
Eye Width | EW15 | 0.46 | UI | At10‑15probability | |
Eye Height | EH15 | 100 | mV | At 10‑15 probability | |
Receiver Electrical Output to Host | |||||
Differential Voltage pk‑pk | 100 | 1200 | mV | ||
Common Mode Noise (rms) | 17.5 | mV | |||
Differential Termination Mismatch | 10 | % | |||
Transition Time | 9.5 | ps | 20/80 % | ||
Vertical Eye Closure | VEC | 6.5 | dB | ||
Eye Width | EW15 | 0.57 | UI | At 10‑15 probability | |
Eye Height | EH15 | 240 | mV | At 10‑15 probability |
Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Notes |
Transmitter | ||||||
Signaling Speed per Lane | 25.78125 | Gbps | ||||
Wavelength Assignment | λ0 | 1294.53 | 1295.56 | 1296.59 | nm | |
λ1 | 1299.02 | 1300.05 | 1301.09 | nm | ||
λ2 | 1303.54 | 1304.58 | 1305.63 | nm | ||
λ3 | 1308.09 | 1309.14 | 1310.19 | nm | ||
Rate Tolerance | ‑100 | 100 | ppm | 1 | ||
Side‑Mode Suppression Ratio | SMSR | 30 | dB | |||
Total Launch Power | 8.9 | dBm | ||||
Average Launch Power, per Lane | Pavg | ‑2.9 | 2.9 | dBm | ||
Extinction Ratio | ER | 8 | dB | |||
Optical Modulation Amplitude, per Lane (OMA) | OMA | 0.1 | dBm | |||
Difference in Launch Power between any Two Lanes (Average and OMA) | 3.6 | dB | ||||
Transmitter and Dispersion Penalty, per Lane | TDP | 2.5 | dB | |||
Average Launch Power of OFF Transmitter, per Lane | ‑30 | dBm | ||||
Transmitter Reflectance | ‑12 | dB | ||||
Output Eye Mask definition {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | |||||
Receiver | ||||||
Signaling Rate, Each Lane | 25.78125 | Gbps | ||||
Rate Tolerance | ‑100 | 100 | ppm | 1 | ||
Average Receive Power, per Lane | Pavg | ‑20.9 | 4.5 | dBm | ||
Receive Power, per Lane (OMA) | 4.5 | dBm | ||||
Difference in Launch Power between any Two Lanes (Average and OMA) | 4.5 | dB | ||||
Receiver Sensitivity (OMA), per Lane | Rsen | ‑21.4 | dBm | 2 | ||
Stressed Receiver Sensitivity (OMA), per Lane | SRS | ‑17.9 | dBm | |||
Stressed Receiver Sensitivity Test Conditions | ||||||
Vertical Eye Closure Penalty, per Lane | VECP | 3.5 | dB | |||
Stressed Sys J2 Jitter, per Lane | J2 | 0.3 | UI | 3 | ||
Stressed Sys J9 Jitter, per Lane | J9 | 0.47 | UI | 3 | ||
Receiver Reflectance | ‑26 | dB | ||||
Los Assert | Plos_on | ‑36 | dBm | |||
Los De‑Assert | Plos_off | ‑24 | dBm | |||
Los Hysteresis | 0.5 | 4 | dB |
Notes:
1. From nominal rate
2. Receiver sensitivity (OMA), per lane, is informative.
3. 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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