Description
ETSC’s OM3680SX200 is a parallel 400GE Quad Small Form Factor Pluggable double density (QSFP-DD) SR8 optical module designed for optical communication applications. The optical module uses a 4- level pulse amplitude modulation (PAM4) format. The optical module provides point-to-point 400 Gigabit Ethernet links over eight pairs of multimode fiber, with a reach of up to 100 m for OM4 (MMF) and 70 m for OM3 (MMF).
It is compliant with QSFP-DD MSA standard and IEEE 802.3cm 400GBASE-SR8 standard and IEEE 802.3bs 400GAUI-8 standard. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP-DD MSA.
Features
- QSFP-DD MSA compliant
- QSFP-DD CMIS4.0 Management interface compliant
- IEEE 802.3cm 400GBASE-SR8 standard compliant
- IEEE 802.3bs 400GAUI-8 standard compliant
- Digital diagnostic functions
- 8 channels full-duplex transceiver module
- 425 Gbit/s aggregate bit rate
- Maximum link length of 70 m OM3, 100 m OM4 with FEC
- Single MPO-16/APC receptacle
- Maximum power dissipation < 10 W
- Operating case temperature range 0 to 70℃
- Single 3.3 V power supply
- RoHS 2.0 compliant
Applications
- 400G Ethernet
- Data center network
Absolute Maximum Ratings
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Maximum supply voltage | Vcc | -0.3 | 3.3 | 3.6 | V | |
Storage temperature | Ts | -40 | 85 | ℃ | ||
Relative humidity | RH | 5 | 85 | % | 1 | |
Damage threshold, each lane | THd | 5 | dBm |
Notes
- Non-condensing.
Operating Environments
Electrical and optical characteristics below are defined under this operating environment, unless otherwise specified.
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Supply voltage | Vcc | 3.135 | 3.3 | 3.465 | V | |
Case temperature | Tc | 0 | 70 | ℃ | ||
Data rate, each lane | 26.5625 | GBd | ||||
Data rate accuracy | -100 | 100 | ppm | |||
Modulation format | PAM4 | |||||
Link distance with OM3 MMF | 70 | m | ||||
Link distance with OM4 MMF | 100 | m | ||||
Link distance with OM5 MMF | 100 | m |
Notes
- Initialization Flows: The Host Initialization Flows of CMIS Rev4.0 Standard Appendix C are recommended.
Electrical Characteristics
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Power dissipation | 9 | 10 | W | |||
Steady state current | Icc | 3189 | mA | 1 | ||
Instantaneous peak current | 4000 | mA | ||||
Sustained peak current | 3300 | mA | ||||
Module-to-Host electrical specifications at TP4 (module output) | ||||||
Differential voltage pk-pk | Vpp | 900 | mV | |||
Common mode voltage | Vcm | -350 | 2850 | mV | 2 | |
AC common-mode output voltage (RMS) | 17.5 | mV | ||||
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Transition time | Trise/Tfall | 9.5 | ps | 20%~80% | ||
Differential termination resistance mismatch | 10 | % | ||||
Near-end ESMW (eye symmetry mask width) | 0.265 | UI | ||||
Near-end eye height, differential | 70 | mV | ||||
Far-end ESMW (eye symmetry mask width) | 0.20 | UI | ||||
Far-end eye height, differential | 30 | mV | ||||
Far-end pre-cursor ISI ratio | -4.5 | 2.5 | % | |||
Differential output return loss | IEEE 802.3-2018 Equation (83E-2) | dB | ||||
Common to differential mode con- version return loss | IEEE 802.3-2018 Equation (83E-3) | dB | ||||
Host-to-Module electrical specifications (module input) | ||||||
Differential termination resistance mismatch | 10 | % | ||||
Overload differential voltage pk-pk | Vpp | 900 | mV | TP1a | ||
DC common mode voltage | Vcm | -350 | 2850 | mV | TP1 | |
Single-ended voltage tolerance | -0.4 | 3.3 | V | TP1a | ||
Module stressed input test | IEEE 802.3bs 120E.3.4.1 | TP1a | ||||
Differential input return loss | IEEE 802.3-2018 Equation (83E-5) | dB | TP1 | |||
Differential to common mode input return loss | IEEE 802.3-2018 Equation (83E-6) | dB | TP1 |
Notes
- The module must stay within its declared power class.
- DC common mode voltage is generated by the host. Specification includes effects of ground offset voltage.
Optical Characteristics
Parameter | Symbol | Min | Typ | Max | Unit | Notes |
Center wavelength | λc | 840 | 868 | nm | ||
Host-to-Module electrical specifications (module input) | ||||||
RMS spectral width | 0.65 | nm | ||||
Average launch power, each lane | PAVG | -6.5 | 4 | dBm | ||
Outer optical modulation amplitude (OMA outer), each lane | POMA | -4.5 | 3 | dBm | ||
Launch power in OMA outer minus TDECQ, each lane | -5.9 | dBm | ||||
Transmitter and dispersion eye clo- sure for PAM4, each lane | TDECQ | 4.5 | dB | |||
TDECQ – 10log10 (Ceq), each lane | 4.5 | dB | ||||
Extinction ratio, each lane | ER | 3 | dB | |||
Transmitter transition time, each lane | 34 | ps | ||||
Average launch power of OFF transmitter, each lane | POFF | -30 | dBm | |||
RIN12OMA | -128 | dB/Hz | ||||
Optical return loss tolerance | 12 | dB | ||||
Encircled flux | ≥ 86% at 19 um ≤ 30% at 4.5 um | Encircled flux | ||||
Receiver | ||||||
Average receiver power, each lane | -8.4 | 4 | dBm | |||
Receiver power, each lane (OMA) | 3 | dBm | ||||
Damage threshold, each lane | THd | 5 | dBm | |||
Receiver reflectance | -12 | dB | ||||
LOS assert | LosA | -24.6 | dBm | |||
LOS de-assert | LosD | -8 | dBm | |||
LOS hysteresis | LosH | 0.5 | dB | |||
Receiver sensitivity (OMA outer), each lane | Sen | Max (– 6.5,SE CQ –7.9) | dB | |||
Stressed receiver sensitivity (OMA) , each lane | SRS | -3.4 | dBm | |||
Conditions of stressed receiver sensitivity test | ||||||
Stressed eye closure for PAM4, lane under test | SECQ | 4.5 | dB | |||
SECQ – 10log10 (Ceq), lane under test | 4.5 | dB | ||||
OMA outer of each aggressor lane | 3 | dBm |