The QSFP28 100G-CWDM4-2km module is a highly integrated 4x25G transceiver focused on reach, bandwidth, density and cost for high port-count 100G systems, and client-side 100G interfaces. It is compliant with the 100G 4WDM-10 MSA, which is based on the CWDM4 MSA version 1.1. It is interoperable with CWDM4 transceivers over a 2 km reach.
Parameters | Symbol | Min. | Max. | Unit | Ref. |
Power Supply Voltage | VCC | -0.5 | +3.6 | V | - |
Storage Temperature | Tc | -40 | +85 | °C | - |
Relative Humidity | RH | 15 | 85 | % | 1 |
Notes:
1. Non-condensing.
Parameter | Symbol | Min | Typical | Max | Unit |
Power Supply Voltage | VCC | 3.15 | 3.30 | 3.45 | V |
Supply current | Icc | - | - | 2898 | mA |
Operating Case Temperature | Tca | 0 | - | 70 | °C |
Parameter | Symbol | Min. | Typical | Max | Unit | Ref. |
Transmitter | ||||||
Signaling rate per lane | - | 26.5625± 100 ppm | GBd | - | ||
Differential peak-peak input voltage tolerance | Vin | 900 | - | - | mV | 1 |
Differential input return loss | - | Per equation (83E–5) IEEE802.3bm | - | - | ||
Differential to common mode input return loss | - | Per equation (83E–6) IEEE802.3bm | - | - | ||
Differential termination mismatch | - | - | - | 10 | % | - |
Module stress input test | - | Per 120E.3.4.1 IEEE802.3bs | - | 2 | ||
Single-ended voltage tolerance range | - | -0.4 | - | 3.3 | V | |
DC common mode voltage | - | -350 | - | 2850 | mV | 3 |
Receiver | ||||||
Signaling rate per lane | - | 26.5625± 100 ppm. | GBd | - | ||
AC common-mode output voltage (RMS) | - | - | - | 17.5 | mV | - |
Differential peak-to-peak output voltage | - | - | - | 900 | mV | - |
Near-end ESMW (Eye symmetry mask width) | - | 0.265 | UI | - | ||
Near-end Eye height, differential (min) | - | 70 | - | - | mV | - |
Far-end ESMW (Eye symmetry mask width) | - | 0.2 | UI | - | ||
Far-end Eye height, differential (min) | - | 30 | - | - | mV | - |
Differential output return loss | - | Per equation 83E-2 IEEE802.3bm | - | - | ||
Common to differential mode conversion return loss | - | Per equation 83E-3 IEEE802.3bm | - | - | ||
Differential termination mismatch | - | - | - | 10 | % | - |
Transition time (min, 20% to 80%) | - | 9.5 | - | - | ps | - |
DC common mode voltage | - | -350 | - | 2850 | mV | 3 |
Notes:
1. With the exception to 120E.3.1.2 that the pattern is PRBS31Q or scrambled idle.
2. Meets specified BER
3. DC common mode voltage generated by the host. Specification includes effects of ground offset voltage.
Parameter | Symbol | Min | Typical | Max | Unit | Ref. |
Signaling Speed per Lane | - | 26.5625 ± 100ppm | GBd | 1 | ||
Modulation format | - | PAM4 | - | - | ||
Center Wavelength | λ | 840 | 850 | 860 | nm | - |
RMS spectral width | ∆λ | - | - | 0.6 | nm | 1 |
Average Launch Power per Lane | Po | -6.5 | - | 4 | dBm | - |
Outer Optical Modulation Amplitude (OMAouter), each lane | OMA | -4.5 | - | 3 | dBm | 2 |
Launch power in OMAouter minus TDECQ, each lane | - | -5.9 | - | - | dBm | - |
Transmitter and dispersion eye closure for PAM4 (TDECQ), each lane | - | - | - | 4.5 | dB | - |
TDECQ – 10log10(Ceq), each lane | - | - | - | 4.5 | dB | 3 |
Extinction Ratio | ER | 3 | - | - | dB | - |
Optical Return Loss Tolerance | ORL | - | - | 12 | dB | - |
Encircled Flux | FLX | > 86% at 19 um < 30% at 4.5 um | - | 4 | ||
Average launch power of OFF transmitter, each lane | - | - | - | -30 | dBm | - |
Notes:
1. RMS spectral width is the standard deviation of the spectrum.
2. Even if the TDECQ < 1.4 dB, the OMAouter (min) must exceed this value.
3. Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.
4. If measured into type A1a.2 or type A1a.3, or A1a.4, 50 μm fiber, in accordance with IEC 61280-1-4.
Parameter | Symbol | Min | Typical | Max | Unit | Ref. | ||
Signaling Rate per Channel | DR | 26. 5625 ± 100ppm | GBd | - | ||||
Modulation format | - | PAM4 | - | - | ||||
Center Wavelength | λ | 840 | 850 | 860 | nm | - | ||
Damage Threshold | DT | 5 | dBm | 1 | ||||
Average receive power, each lane | RXPOW | -8.4 | - | 4 | dbm | 2 | ||
Receive power (OMAouter), each lane | RxOMA | - | - | 3 | dBm | - | ||
Stressed Receiver Sensitivity (OMA) per Lane | SRS | - | - | -3.4 | dBm | 3 | ||
Stressed eye closure for PAM4 (SECQ), lane under test | - | 4.5 | dB | 4 | ||||
SECQ – 10log10(Ceq)f, each lane (max) | - | 4.5 | dB | |||||
OMAouter of each aggressor lane | - | 3 | dBm | - | ||||
LOS De-Assert | Lda | - | - | -9 | dBm | - | ||
LOS Assert | Lsa | -30 | - | - | dBm | - | ||
LOS Hysteresis | Lh | 0.5 | - | - | dB | - |
Notes:
1. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level on one lane. The receiver does not have to operate correctly at this input power.
2. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant; however, a value above this does not ensure compliance.
3. Measured with conformance test signal at TP3 (see IEEE 802.3cd 138.8.10) for the BER specified in 138.1.1.
4. Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.
Parameter | Symbol | Min | Typical | Max | Unit | Ref. |
Bit Rate (all wavelengths combined) | BR | - | - | 425 | Gb/s | 1 |
Bit Error Ratio (pre-FEC) | BER | - | - | 2.4E-4 | - | 2 |
Maximum Supported Distances | ||||||
Fiber Type | - | - | - | - | - | - |
OM3 MMF | LMAX1 | - | - | 70 | m | - |
OM4 MMF | LMAX2 | - | - | 100 | m | - |
Notes:
1. Supports 400GBASE-SR8 per IEEE P802.3cm.
2. As defined by IEEE P802.3cm.